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  • Other Sources  (3,202)
  • GEOPHYSICS  (2,228)
  • METEOROLOGY AND CLIMATOLOGY  (974)
  • Aluminium oxide; Calcium oxide; DEPTH, sediment/rock; Description; Event label; Finland; GulfBothnia_AA; Gulf of Bothnia, Baltic sea; Heinajarvi_AA; Identification; Insoluble material; Iron oxide, Fe2O3; Kuivajarvi_AA; Liesjarvi_AA; Loss on ignition; Magnesium oxide; Manganese oxide; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oksjarvi_AA; Onkimajarvi_AA; Phosphorus pentoxide; Punelianjarvi_AA; Pyhajarvi_AA; Saarijarvi_AA; Sakaranjarvi_AA; Salkolanjarvi_AA; Salovesi_AA; Silicon dioxide; Vahermajarvi_AA; Vuotinainenjarvi_AA; Wet chemistry
  • Organic Chemistry
  • 1975-1979  (3,198)
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  • 1
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    Kerogen structures in recently-deposited algal mats at Laguna Mormona, Baja California: A model system for the determination of kerogen structures in ancient sediments (1977)
    In:  CASI
    Details
    Publication Date: 2005-02-28
    Keywords: GEOPHYSICS
    Type: Res. in the Space Sci., Vol. 2, No. 1; 29 p
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  • 2
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    Wind estimates from cloud motions: Result of an in situ aircraft verification experiment (1977)
    In:  CASI
    Details
    Publication Date: 2009-11-16
    Description: A world wide system of 5 geostationary satellites is being established with a primary objective: the estimation of winds from cloud motions. A series of aircraft experiments were carried out to perform an in situ verification of the satellite cloud winds, under undisturbed to moderately disturbed oceanic weather regimes.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 235-239
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  • 3
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    Mathematical modelling of undrained clay behavior (1976)
    In:  CASI
    Details
    Publication Date: 2006-08-09
    Description: The proposed general analytical model describes the anisotropic, elastoplastic, path-dependent, stress-strain properties of inviscid saturated clays under undrained conditions. Model parameters are determined by using results from strain-controlled simple shear tests on a saturated clay. The model's accuracy is evaluated by applying it to predict the results of other tests on the same clay, including monotonic and cyclic loading. The model explains the very anisotropic shear strength behavior observed for weak marine clays.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 1; p 95-102
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  • 4
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    Experience with the inversion of Nimbus 4 BUV measurements to retrieve the ozone profile (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: The relative merits of pressure increment and partial derivative formulations of the ozone inversion problem are discussed briefly. The height range of validity of the retrieved ozone profile and the effects of adding wavelengths to or of dropping wave-length from the inversion system are indicated. Illustrative results are presented for profiles retrieved from BUV data using Backus-Gilbert, minimum information (Twomey), and quasi-optimum procedures.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 577-597
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  • 5
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    The inversion of stratospheric aerosol and ozone vertical profiles from spacecraft solar extinction measurements (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: The inversions of multi-channel solar extinction measurements have been analyzed for the 0.35-1.0 micron wavelength region to retrieve stratospheric aerosol and ozone vertical profiles using both the constrained linear inversion scheme and the iterative scheme. The inversions of the multi-wavelength solar extinction data obtained from spacecraft have been analyzed based on the inversion of computer simulated data using various atmospheric models with differing amounts of aerosol and ozone in the stratosphere. The sensitivities of the inversion schemes to different experimental errors are discussed in terms of accuracy and resolution of the retrieved profiles.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 505-527
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  • 6
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    Application of modified Twomey techniques to invert lidar angular scatter and solar extinction data for determining aerosol size distributions (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: Polarization properties of the angularly scattered laser light from a volume of air are used to determine the size distribution of the aerosol particles within the volume by the use of appropriate inversion techniques. Similar techniques are employed to determine a mean size distribution of the particulates within a vertical column through the atmosphere from determinations of the aerosol optical depth as a function of wavelength. In both of these examples, a modification of an inversion technique originally described by Twomey has been employed. Details of this method are presented as well as results from actual measurements employing bistatic lidar and solar radiometer.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 469-503
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  • 7
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    Application of statistical inversion to ground-based microwave remote sensing of temperature and water vapor profiles (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: Surface-based observations of downwelling microwave thermal emission are related to temperature and humidity profiles via a standard integral equation of radiative transfer. Both in clear and in cloudy atmospheres, statistical inversion techniques are used to retrieve profiles from a data vector of brightness observations and surface meteorological constraints. For the clear case, accuracy predictions and profile retrievals are illustrated for: (1) single frequency angular scanned data; (2) multi-frequency angular scanned data; and (3) multi-frequency zenith data. For the last case predicted and achieved accuracies were compared in a recently conducted radiometric experiment. Retrievals of cloud contaminated radiometric data are elaborated.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 395-427
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  • 8
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    Comparison of linear inversion methods by examination of the duality between iterative and inverse matrix methods (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: Linear numerical inversion methods applied to atmospheric remote sounding generally can be categorized in two ways: (1) iterative, and (2) inverse matrix methods. However, these two categories are not unrelated; a duality exists between them. In other words, given an iterative scheme, a corresponding inverse matrix method exists, and conversely. This duality concept is developed for the more familiar linear methods. The iterative duals are compared with the classical linear iterative approaches and their differences analyzed. The importance of the initial profile in all methods is stressed. Calculations using simulated data are made to compare accuracies and to examine the dependence of the solution on the initial profile.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 325-360
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  • 9
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    Analytic model approach to the inversion of scattering data (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: An analytic model approach is applied to several simple atmospheric inversion problems. This method gives a sharp determination of aerosol size distribution parameters. It is shown that this analytic approach, together with ground level point sampling data measurements, can be used to infer information on the tropospheric ozone profile.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 297-324
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  • 10
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    Inversion of infrared limb emission measurements for temperature and trace gas concentrations (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: Limb emission measurements are characterized by sharp weighting functions at high altitudes, and for temperature determinations, strongly nonlinear dependence of the weighting function on the temperature. Several methods for inverting this type of measurement have been described and used, including iterative, statistical, nonlinear and approximate direct approaches. These approaches are described and advantages and disadvantages of each are outlined.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 195-216
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  • 11
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    Inverse solution of the pseudoscalar transfer equation through nonlinear matrix inversion (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: Nonlinear matrix inversion operators have been developed which, applied to observed radiances, infer maximal information regarding atmospheric scattering parameters and vertical distribution of radiant sources and sinks. The algorithm has the attractive feature of noise discrimination, attributing instrumental errors to extra-atmospheric sources.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 139-153
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  • 12
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    Backus-Gilbert theory and its application to retrieval of ozone and temperature profiles (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: The inversion method provides a quantitative evaluation of the trade-off between vertical resolution of a retrieved profile and formal root-mean-square (rms) error due to measurement noise propagation. The problem of retrieving the top-side ozone profile from backscattered ultraviolet (BUV) measurements is considered. For measurements of the type currently being obtained with the Nimbus 4 and AE-E BUV experiments, it is found that a vertical resolution of approximately 0.75 scale height can be achieved for a formal volume mixing ratio profile error of 10%. Other examples include treatments of the retrieval of temperature profiles from measurements in the 15 micron CO2 absorption band for both the terrestrial and Martian atmospheres. Finally, the method is applied to the problem of retrieving temperature profiles of the Jovian planets from measurements in the far infrared pressure induced H2 lines to be obtained from the Mariner Jupiter/Saturn fly-by missions.
    Keywords: GEOPHYSICS
    Type: Inversion Methods in Atmospheric Remote Sounding; p 155-193
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  • 13
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    Statistical principles of inversion theory (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: Statistical methods are used to deal with the inverse problem of radiative transfer. All the available information about an unknown profile can be expressed in the form of values of functions of that profile and error estimates of these values. Estimation theory shows how these values are combined to give an estimate of the unknown profile and its error covariance. Many inversion methods are expressed in this form, although the error estimate is not usually carried out. Practical applications are described, both for inversion of individual profiles, and the global analysis of satellite data.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 117-138
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  • 14
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    Some aspects of the inversion problem in remote sensing (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: Several commonly used methods for inversion--constrained linear inversion, synthesis (Backus-Gilbert) methods and nonlinear iterative techniques for the Chahine type--are discussed. It is demonstrated that a very close connection exists between Backus-Gilbert solutions and those given by constrained linear inversion. A number of examples of the application of such methods are presented, showing that resolution is not greatly different for quite different algorithms, a result quite in accord with general theoretical considerations: more resolution can be achieved at the expense of introducing greater a priori bias in the procedure.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 41-65
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  • 15
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    Review of radiative transfer methods in scattering atmospheres (1977)
    In:  CASI
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    Publication Date: 2006-05-22
    Description: The radiative transfer in a scattering plane-parallel atmosphere is discussed, considering the exact analytical, the computational and the approximate methods. Some results of numerical comparisons are given. Finally, the difficulties of realistic atmospheric models are emphasized.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 21-40
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  • 16
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    Hybrid methods are helpful (1977)
    In:  CASI
    Details
    Publication Date: 2006-05-22
    Description: Multiple scattering problems in a plane layer often permit the convenient use of different methods joined together. Sample numerical results to illustrate this point refer to X- and Y-functions, asymptotic fitting, the small-loss approximations, polarization in high orders, and photon path distribution.
    Keywords: GEOPHYSICS
    Type: NASA. Langley Res. Center Inversion Methods in Atmospheric Remote Sounding; p 1-19
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  • 17
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    Ion production in the D region (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Ionization processes for the D region are reviewed. Levels of ionization range from the fairly steady rates produced through galactic cosmic rays to the large rates generated during solar flares and associated geomagnetic storms. The normal quiescent daytime D region is ionized by solar UV radiation available because of certain windows and solar X-rays, although this later source is generally weak. Cosmic rays are important roughly below 65 km. At night, stellar X-ray sources may be important along with precipitating electrons at high latitudes from the quiet magnetosphere. Solar flares can result in ionization rates due to X-rays, electrons, or nuclei which are greatly enhanced over quiet conditions. Typical ionization production rates from these various sources are illustrated.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 599-616
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  • 18
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    D region predictions (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Present knowledge of D region phenomena is briefly reviewed and the status of current methods of predicting their effects on radio propagation considered. The ELF, VLF and LF navigational and timing systems depend on the stability of the lower part of the D layer where these waves are reflected, whereas MF and HF waves are absorbed as they penetrate the region, in most cases mainly in the upper part of the layer. Possible methods of improving predictions, warnings, and real time operations are considered with particular stress on those which can be implemented in the near future.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 573-598
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  • 19
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    Morphology and phenomenology of the high-latitude E and F regions (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Results obtained at high latitude observatories on the behavior of E and F region ionization are presented including a bibliography. Behavior of E and F region ionization during day and night for quiet and disturbed conditions in the auroral and polar regions is described. Daily, seasonal and sunspot variations are also outlined.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 543-561
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  • 20
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    Report of the mid- and low-latitude E and F Region Working Group (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The formation and variation of the ionosphere is addressed with regard to the ability to understand, specify, and predict the low and mid latitude E and F regions. A brief survey of prediction methods and techniques is given for long and short term variability in the E and F regions. It is indicated that the usefulness of theoretical models to predict electron density distribution in the low and mid latitude ionospheric E and F regions is limited by the ability to predict the parameters which enter the relevant equations; i.e., neutral atmospheric constituents, neutral and charged particle temperatures, neutral wind, electric fields, and ionizing sources such as solar (E sub uv) radiation and energetic particles. It is recommended that areas for research include improving knowledge of the input parameters and how they respond to changing solar and geophysical conditions.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 562-572
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  • 21
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    On the approach to forecasting polar ionospheric conditions (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The major properties of polar ionospheric main anomalous events are summarized. The monitoring of large scale features of the ionization distribution that are the projections of large scale structural characteristics of magnetospheric plasma on the upper ionosphere is suggested as a basic principle of polar ionospheric condition forecasting. It is concluded that the processes of the magnetosphere/ionosphere interaction appear to play a predominant role in the creation of the polar ionosphere.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 528-542
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  • 22
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    High-latitude E and F region ionospheric predictions (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The physical processes and morphology of the high latitude E and F layers are discussed. The existence and adequacy of models, and features to be included are examined, as well as reliability of ionospheric predictions.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 513-527
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  • 23
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    Long term magnetospheric particle variations (1 day T infinity), appendix 2 (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Effects of solar variations on energetic particle propagation are discussed, as well as prediction techniques for such particles within the magnetosphere. Magnetic field models, magnetic energy stored in the tail, magnetic monitoring measurements in the geostationary orbit and at certain ground based stations are important elements concerning improving such techniques.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 441-445
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  • 24
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    Ionospheric modeling at Air Force Global Weather Central (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The four Dimensional Ionospheric Model (4-D) is described. The 4-D integrates a wide variety of ionospheric data types into a consistent ionospheric specification. At each observing location, the 4-D reduces an entire electron density profile to four weighting coefficients. These weighting coefficients are interconnected in time and space by spectral analysis techniques. The resultant field of spectral coefficients can be used to reconstruct an electron density profile at any latitude, longitude and time.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 367-377
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  • 25
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    Geophysical forecasting at AFGWC (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Methods for forecasting the state of the space environment, Sun, interplanetary field, magnetosphere, and ionosphere are discussed. Areas requiring scientific advancements to support the increasing operational requirements of systems that use or are affected by the environment above 50 km are identified.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 350-366
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  • 26
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    A weekly ionospheric index (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The monthly and weekly T indices are discussed. Some possibilities for improving the reliability of the weekly T index are considered, including extending its applicability to daily variations of the global ionosphere.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 279-287
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  • 27
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    A review of the operation of the IUWDS Regional Warning Centre at the Ionospheric Prediction Service, Sydney (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The operation of the Sydney Regional Warning Centre is reviewed. Routine data reports are issued daily, while disturbance warnings (short-term forecasts) are issued as necessary. An outline of the methods used in forecasting solar activity and geomagnetic disturbances is given.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 229-238
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  • 28
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    A disturbance forecaster's view of the September 1977 events (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The solar-geophysical events of 1977 September 7-26 are presented. A variety of disturbance forecasting problems, viz, disc transit of a center of activity with high microwave flux but relatively low meter-wave flux, flares in this region near east limb, central meridian, and west limb with major radio events, and the presence of two coronal holes, were observed. The Sydney daily GEOSYD message and IPS Disturbance Warnings issued during this period are related to the solar geophysical data available, at the time, about these events.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 239-248
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  • 29
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    Forecasting ionospheric and geomagnetic conditions at the IAG forecasting center (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: A description of the Moscow Regional Warning Center activity in the field of geomagnetic and ionospheric forecasting is presented.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 104-117
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  • 30
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    A simplified indexing of F-region geophysical noise at low latitudes (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: A simple method of deriving an F-region index that can warn the prediction users at low latitudes as to the specific months when they have to be more careful in using the long term predictions is described.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 134-139
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  • 31
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    A method of predictions geomagnetic activity based on a coronal model of relations between solar and geomagnetic activities (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: A method developed to predict both disturbed and quiet geomagnetic periods is described. The method uses solar situations along the CM with the key role of filaments, giving indirect evidence of types of directly unobservable coronal structures above them. The time lag, not to be interpreted in terms of propagation speed, between the CM activity and the commencement of the geomagnetic response is about one to two days. Solar phenomena serve as indicators within approximately 10 deg of the CM and up to the zone of high latitude filaments.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 44-60
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  • 32
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    National geodetic satellite program, part 1 (1977)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: Determinations of tracking station locations and the gravitational constant of the earth, based on Doppler-tracking data from lunar and planetary spacecraft are presented. Two-way Doppler data obtained by the Deep Space Network of the Jet Propulsion Laboratory (JPL) were used. The Deep Space Station instrumentation that JPL employed is described. How the stations were located is detailed, and the data used are discussed. Results are given together with an analysis of the errors.
    Keywords: GEOPHYSICS
    Type: Natl. Geodetic Satellite Program, Pt. 1; p 249-292
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  • 33
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    National geodetic satellite program, part 1 (1977)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: The Applied Physics Laboratory (APL) space research program was directed toward modeling the gravitational field of the earth from an analysis of the Doppler shifts on the transmitted frequencies of the satellites as obtained by the tracking stations. Emphasis is on the satellites involved and the methods used in accomplishing this aim.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Natl. Geodetic Satellite Program, Pt. 1; p 89-138
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  • 34
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    The communications industry's requirements and interests (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Of interest to the communications industry are the amplitude, waveshape, duration and frequency of lightning-originated voltage surges and transients on the communications network, including the distribution system and AC power supply circuits. The cloud-to-ground lightning discharge and its characteristics are thought to be most meaningful. Of specific interest are peak current, waveshape, number of flashes, strokes per flash, and zone of influence. Accurate and meaningful lightning data at the local level (telephone district office) is necessary for a decision on the appropriate protection level. In addition to lightning, the protection engineer must consider other factors such as: AC induction, switching surges, ground potential rise, soil resistivity, bonding and grounding techniques, shielding and isolation, and exposure of the telephone loop.
    Keywords: GEOPHYSICS
    Type: Proc.: Workshop on the Need for Lightning Observations from Space; p 115-125
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  • 35
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    The state of technology in electromagnetic (RF) sensors (for lightning detection) (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: A brief overview of the radio-frequency sensors which were applied to the detection, isolation, and/or identification of the transient electromagnetic energy (sferics) radiated from one or more lightning discharges in the atmosphere is presented. Radio frequency (RF) characteristics of lightning discharges, general RF sensor (antenna) characteristics, sensors and systems previously used for sferic detection, electromagnetic pulse sensors are discussed. References containing extensive bibliographies concerning lightning are presented.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Proc.: Workshop on the Need for Lightning Observations from Space; p 88-109
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    Lightning hazards overview: Aviation requirements and interests (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A ten-year history of USAF lightning incidents is presented along with a discussion of the problems posed by lightning to current aircraft, and the hazards it constitutes to the electrical and electronic subsystems of new technology aircraft. Lightning technical protection technical needs, both engineering and operational, include: (1) in-flight data on lightning electrical parameters; (2) tech base and guidelines for protection of advanced systems and structures; (3) improved laboratory test techniques; (4) analysis techniques for predicting induced effects; (5) lightning strike incident data from general aviation; (6) lightning detection systems; (7) pilot reports on lightning strikes; and (8) better training in lightning awareness.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Proc.: Workshop on the Need for Lightning Observations from Space; p 126-135
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    State of technology in optical systems (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The use of silicon photodiode sensors and locator systems for lightning experiments is discussed. Tables are presented on: (1) satellite optical lightning experiments (silicon detectors); (2) reticon photodiode linear arrays; and (3) locator systems (grey code and reticon). An illustration of a grey code locator system for a low altitude satellite is also given.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Proc.: Workshop on the Need for Lightning Observations from Space; p 81-87
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    A review of satellite lightning experiments (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Over the past five years a series of satellite optical experiments were conducted to investigate terrestrial lightning. These experiments were designed to gather statistical information about the optical waveform of lightning, measure occurrence rates, demonstrate the feasibility of detecting lightning from space platforms, and study possible applications for satellite lightning sensors. These experiments are reviewed. Some of the results are presented, and some ideas for future satellite systems are discussed.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Proc.: Workshop on the Need for Lightning Observations from Space; p 61-80
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    Areas where solar-terrestrial coupling may influence or be influenced by the middle atmosphere (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The nature of the wave interactions, particularly those induced by transient solar and geomagnetic phenomena is discussed. Solar activity which includes modulations of galactic cosmic ray flux reaching Earth is discussed. Coupling processes involving charged particles and atmospheric electric structure are presented.
    Keywords: GEOPHYSICS
    Type: Middle Atmosphere Electrodyn.; p 219-249
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    Energy and mass transport in the thermosphere (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Examples illustrating the effects of large scale energy and mass transport in the thermosphere discussed include: (1) The seasonal variations reveal temperature, composition, and ionospheric anomalies involving energy exchange between the thermosphere and mesosphere. (2) The midnight temperature maximum in the thermosphere is interpreted as a signature of tidal waves emanating from the mesosphere and momentum coupling associated with ion drag. (3) The ionospheric storm in the F region illustrates the intricate effects of large scale atmospheric winds driven by magnetospheric energization processes. (4) Atmospheric signatures of Joule heating and electric field momentum coupling are markedly different.
    Keywords: GEOPHYSICS
    Type: Middle Atmosphere Electrodyn.; p 169-202
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    Middle atmosphere electrodynamics: Report of the Workshop on the Role of the Electrodynamics of the Middle Atmosphere on Solar Terrestrial Coupling (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The middle atmosphere (MA), which is defined as the region bounded below by the tropopause near 10 km and above by the mesopause near 90 to 100 km, is regarded as a passive medium through which electric fields and currents are transmitted from sources above and below. A scientific background is given for: sources of MA electric fields; MA conductivity and currents; and MA plasma characteristics. Recommendations are given for research in MA electrodynamics in the following areas: (1) MA electrodynamical parameters; (2) models and supportive laboratory measurements; and (3) investigation of specific problems in the coupled systems.
    Keywords: GEOPHYSICS
    Type: Middle Atmosphere Electrodyn.; p 1-25
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    A summary of monthly mean simulation experiments with the GISS model (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The statistical results of 8 monthly mean simulation experiments with the GISS general circulation model are summarized for the Northern Hemisphere in terms of the fields of sea-level pressure, 500-mb. height, and 850-mb. temperature.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 323-327
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    Sampling analysis for the earth radiation budget satellite system mission (1977)
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    Description: A study was conducted to identify problems related to sampling the Earth's radiant energy budget and to define a satellite system with sufficient sampling to satisfy science requirements on global, zonal, and regional scales.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 153-157
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    A simple algorithm for inferring the vertical ozone profile from satellite measurements (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A general methodology for establishing and testing remote sensing inversion procedures has yielded a simple procedure for inverting BUV radiances.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 129-133
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    A statistical method for time-continuous assimilation of remote sounding temperatures (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A time-continuous statistical method is presented for the four-dimensional assimilation of remote sounding temperatures based on radiometric measurements from polar-orbiting satellites. This method is applied to DST-6 data from the NOAA-4 and Nimbus-6 satellites. Experiments are reported in which the state of the atmosphere throughout the test period was determined using a varying amount of satellite data and in which different methods were used for their assimilation. Data from the NOAA-4 satellite only, from Nimbus-6 only, and from both satellites together were used; the methods tested include different variations of the statistical method as well as more traditional methods. The conclusions are that: (1) satellite-derived temperature data can have a modest, but statistically significant positive impact on numerical weather prediction in the two-to-three day range; (2) this impact is highly sensitive to the quantity of data available; and (3) the assimilation method plays a major role in the magnitude of the impact for the same data.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 93-103
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    Profiling of atmospheric water vapor with microwave radiometry (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Weighting functions were developed which express the water vapor information content of microwave radiometric measurements. Retrievals of water vapor profiles are performed using these weighting functions.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 81-85
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    The evaluation by numerical simulation of the design for a Microwave Pressure Sounder (MPS) (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The potential accuracy of an active multifrequency millimeter-wave technique for the remote measurement of atmospheric pressure at the Earth's surface was investigated by numerical simulation.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 71-75
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    Cloud temperatures and prediction of hurricane intensity (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Equivalent black body temperatures of clouds around tropical cyclones are used in a statistical technique to forecast changes in maximum winds for 24 hours in advance.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 41-45
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    A real-time subsynoptic, meso, and microscale severe storm forecast system (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A system of differential equations is integrated numerically in space and time over several different matrices in an effort to simulate the atmospheric wave structures which organize severe local storms. Preliminary results with case studies indicate that dynamical fields produced by the numerical simulations can be translated into very fine scale space and time zones where severe storm forecast indices can be developed. These fine scale indices are now available in real-time when run on Langley's STAR 100 computer system.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 29-33
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    Detection of severe storms through a tropospheric-ionospheric coupling mechanism (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Acoustic-gravity waves were detected by a ground-based ionospheric sounding array, and the location of the wave generation source was determined by a reverse group ray path computation. Computed sources of these waves were located near locations where tornadoes touched down from 2 to 4 hours later. It is suggested that the overshooting and ensuing collapse of convective turrets may be responsible for generating the acoustic-gravity waves observed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 11-15
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    Three dimensional cloud top changes related to thunderstorm severity (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Digital infrared data from a geostationary satellite are used to study thunderstorm top growth rates and other parameters in relation to the occurrence of severe weather on the ground. Both the rate of upward growth of the thunderstorm top and the maximum height reached are shown to be useful parameters in the detection of severe thunderstorms.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 7-10
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    Climatological features revealed by ESMR derived oceanic rainfall maps (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Several new climatological patterns become apparent from the analysis of satellite-derived global oceanic rainfall maps. Five interesting features are briefly discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 135-139
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    The effect of sea ice extent on the climatology of the Giss general circulation model (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Two model simulations were calculated with the GISS general circulation model corresponding to hypothetical maximum and minimum January sea ice conditions in the north and south polar regions. Results indicate that there were large differences in the Northern Hemisphere circulation between maximum and minimum ice conditions in zonally averaged temperature, vertically averaged eddy sensible heat flux, and mean 500 mb geopotential height. The calculated differences are found to be greater than the inherent variability of the model.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 105-109
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    Operation Aurorozone: An experiment in sun/weather (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Operation Aurorozone was a highly coordinated sequence of 33 rocket flights launched from Poker Flat, Alaska, in September 1976. The effects of aurorally produced X-rays on stratospheric neutral and electrical parameters was studied. The sun/weather coupling between upper and lower regions of the atmosphere is thought to be related to these middle atmospheric parameters. The results show a consistent depletion of ozone above 1 mb during three independent auroral events, with magnitudes in excess of those expected from the measured energy radiation sources. Simultaneously, enhanced conductivity changes were observed to occur in accord with the measured ionizing radiations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 121-125
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    Design and testing of a new planetary boundary layer parameterization (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A new planetary boundary layer parameterization was developed. Tests included forecasting experiments.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 117-120
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    Numerical simulation of flow near steep mountains with a potential enstrophy conserving scheme for the shallow water equations (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Numerical experiments show that use of a potential enstrophy conserving scheme drastically improves numerical simulation of flow near steep mountains.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 111-115
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    Remote sensing of the boundary layer (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Limited information about the boundary layer stratification is obtained from remote infrared spectral measurements in the water vapor window region. A global map of the average strength of the water vapor spectral lines in the 9 micron window region derived from Nimbus 4 IRIS data is presented to indicate this boundary layer information. Presence of deep convective layer in the intertropical convergence zone and trade wind inversion over the subtropical oceanic high pressure systems are appropriately revealed in this map.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 77-80
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    Wind speed and aerosol optical thickness estimates from aircraft observations of sea flitter (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Aircraft observed radiances were used to measure surface wind speed and aerosol thickness. Results show that the surface wind speed is related to the width of the glitter pattern.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 67-70
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    Objective tropical cyclone analysis and forecasting technique using conventional and Nimbus-5 electrically scanning microwave radiometer measurements (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The ADAPT empirical analysis programs, based on finding an optimal representation of the data in the Karhunen-Loeve sense, were applied to 120 observations of twenty-nine 1973 and 1974 Pacific tropical cyclones. Each observation consists of NIMBUS-5 electrically scanning microwave radiometer (ESMR) radiation measurements at 267 grid points covering and surrounding the tropical cyclone plus nine other non-satellite derived descriptors. Analysis and forecast algorithms to estimate storm motion and intensity were developed for times ranging from the observation time up to 72 hours later. The 24 hr wind speed forecasts with an accuracy of 11.7 knots and position forecasts with accuracies 15% better than persistence were demonstrated using independent tests.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 47-50
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    Latent heat calculations and their relationship to tropical cyclone intensity (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Data from the Nimbus-5 electrically scanning microwave radiometer (ESMR) were used to calculate total storm latent heat release (LHR) and other precipitation parameters for over 100 satellite observations of Pacific Ocean tropical cyclones. The data are useful in determining the rainfall characteristics of these storms and appear to be potentially useful in monitoring them.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 35-39
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    Severe storms and their interaction with the environment (1977)
    In:  CASI
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    Description: A brief description is given of significant research accomplishments and of planned research on atmospheric variability and the interaction of severe storms with their environment using atmospheric variability experiments data. Use of the results for the assessment of satellite capabilities are described briefly.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 23-27
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    The Limb Infrared Monitor of the Stratosphere (LIMS) experiment (1978)
    In:  CASI
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    Description: The Limb Infrared Monitor of the Stratosphere is used to obtain vertical profiles and maps of temperature and the concentration of ozone, water vapor, nitrogen dioxide, and nitric acid for the region of the stratosphere bounded by the upper troposphere and the lower mesosphere.
    Keywords: GEOPHYSICS
    Type: NASA. Goddard Space Flight Center The Nimbus 7 User's Guide; p 71-104
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    Summary report of the Weather Services Committee (1978)
    In:  CASI
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    Description: Weather services to severe storms, turbulence, icing, visibility, and lightning are discussed. Each weather phenomenon area was explored in terms of needs, problems related to providing services, and availability of timely and appropriate information.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 234-236
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    Summary report of the Aircraft Design Committee (1978)
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    Description: Aircraft models were designed to solve aircraft lightning, severe storms, turbulence, icing, and visibility problems. Analytical modeling, wind tunnel simulation tests, ground tests, and in-flight tests were conducted.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 229-238
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    Summary report of the Human Factors Committee (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Reduced visibility as a human factors problem was studied in terms of the number of lives lost and cost of aircraft accidents and incidents. Human factors in flight through turbulence in detection and avoidance techniques, pilot and crew procedures for handling workloads and distractions caused by turbulence, and aircraft handling techniques for safe flights through turbulence are investigated. Education and training were reviewed in icing problems on aircraft. Pilots failure to recognize and detect wind shear in severe storms is examined. The pilots avoidance of lightning is discussed from the human factors point of view.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 219-228
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    Summary of the Aircraft Operations Committee (1978)
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    Publication Date: 2006-01-12
    Description: Severe storms and turbulence, icing, visibility, and lightning are discussed in new programs on aircraft operations. The education of pilots and ground service personnel are reviewed. More available information of weather programs and services are examined.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 215-218
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    Summary report of the Lightning and Static Electricity Committee (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Lightning protection technology as applied to aviation and identifying these technology needs are presented. The flight areas of technical needs include; (1) the need for In-Flight data on lightning electrical parameters; (2) technology base and guidelines for protection of advanced systems and structures; (3) improved laboratory test techniques; (4) analysis techniques for predicting induced effects; (5) lightning strike incident data from General Aviation; (6) lightning detection systems; (7) obtain pilot reports of lightning strikes; and (8) better training in lightning awareness. The nature of each problem, timeliness, impact of solutions, degree of effort required, and the roles of government and industry in achieving solutions are discussed.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 203-214
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    Summary Report of the Icing Committee (1978)
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    Description: Icing parameters have created problems and the problem areas that still exist today are presented. The problem areas include; (1) instrumentation; (2) test facilities; (3) weather forecasting of icing conditions; (4) meteorological design criteria; and (5) meteorological data.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 193-199
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    Summary report of the Turbulence Committee (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The effects of atmospheric turbulence are discussed. Aircraft design and aircraft operations are reviewed. Turbulence in terms of intensity and scale in design considerations was examined. Turbulence models were used in the form of discrete gusts, spectral distributions, and probability distributions. Various aspects of the design and operations problems, simulation and training factors of pilots, and weather services and forecasts are reported.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Tenn. Univ. Space Inst. Proc. of the 2nd Ann. Workshop on Meteorol. and Environ. Inputs to Aviation Systems; p 185-191
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    Microwave radiometer measurement of water vapor path delay: Data reduction techniques (1978)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Data reduction techniques are developed to compensate for water vapor path delay, a limiting error source in geodetic measurements made with very long baseline interferometry and in radio ranging to spacecraft. It is shown that water vapor path delay is proportional to a linear combination of saturation-corrected sky brightness temperatures, measured on and off the water vapor line. The effects of emission from liquid water droplets in clouds as well as most of the oxygen emission are removed by the off-line channel. Sky brightness temperatures are saturation-corrected or 'linearized' using estimates of effective sky temperatures made from surface temperature. Tipping curves are used to remove instrumental error. Coefficients are found by two methods: from a regression analysis of measured brightness temperatures versus radiosonde measured delay, and from a regression analysis of theoretical brightness temperatures versus radiosonde measured delay. In each case the coefficients are adjusted for differing climatic conditions by measurements of surface temperature, pressure, and relative humidity. Regression solutions are constrained to remove liquid water contributions and to give the correct slope for radiometer versus radiosonde path delay.
    Keywords: GEOPHYSICS
    Type: The Deep Space Network; p 22-30
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    Current status of understanding quasi-permanent fields associated with earthquakes (1975)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The basic concepts relating to displacement fields associated with earthquakes are described. Factors discussed include: understanding the geologic and tectonic setting, the discovery of fault creep, and an extended range of possible models of strain buildup. Problems in tectonic modeling reviewed relate to understanding (1) frictional heat generation on faults, (2) the character of stress and strain on faults below the depth of earthquakes, and (3) the predictability of major earthquakes.
    Keywords: GEOPHYSICS
    Type: Ohio State Univ. Res. Found. Proc. of the Geodesy/Solid Earth and Ocea; 103-110
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    The geoid: Definition and determination (1975)
    In:  CASI
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    Description: The principles and problems relative to the determination of the geoid are outlined. Factors discussed include: gravity data requirements for a precise geoid; mean sea level; and satellite altimetry. It is indicated that geoid undulations can be determined on a global basis to plus or minus 3 m. Application of geoid information to oceanography and the determination of sea surface topography considered.
    Keywords: GEOPHYSICS
    Type: Proc. of the Geodesy/Solid Earth and Ocean; 69-77
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    OGO 3 (1975)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The OGO 3 spacecraft characteristics are briefly described. Brief descriptions of experiments are presented along with bibliographies of papers pertaining to these experiments.
    Keywords: GEOPHYSICS
    Type: OGO Program Summary; 8 p
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    OGO 2 (1975)
    In:  CASI
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    Description: The OGO 2 spacecraft characteristics are briefly described. Brief descriptions of experiments are presented along with a bibliography of papers pertaining to that experiment.
    Keywords: GEOPHYSICS
    Type: OGO Program Summary; 7 p
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    Forecasts of geomagnetic activity by Ottawa Magnetic Observatory: Their reliabilty and application (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: A 27 day forecast of geomagnetic activity based on the forecasts from two locations is presented. To evaluate the reliability of the forecasts, the predicted activity was compared with the actual geomagnetic activity at five geomagnetic observatories located in different magnetic zones: Ottawa (57.0N, 351.5E); Meanook (61.8N, 301.0E); Fort Churchill (68.8N, 322.5E); Cambridge Bay (76.7N, 294.0E); and Resolute Bay (83.1N, 287.7E). Results indicate that the percentage of correct predictions varies with the geomagnetic latitude of the observatory used for comparison. The percentage is on the average highest for lower latitude stations and lowest for the northern stations. The number of incorrect predictions ranges from 4.7% for Ottawa to 8.4% for Churchill.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 398-405
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    Prediction limits for foF2 (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Some of the factors limiting the prediction of foF2 are investigated using median and hourly foF2 values recorded at stations in the Australian ionosonde network. Different time and spatial scales together with different levels of solar and geomagnetic activity are considered. All data used in the analysis are displayed in a series of scatter diagrams which provide an overall view of the accuracy limits for foF2 predictions.
    Keywords: GEOPHYSICS
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 259-278
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    The forecasting center of Meudon, France (1979)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Main features of solar activity are described in relation to solar and geophysical forecasting. Spectroheliograms, radio and X-ray data, white light coronal observations, particles data, photospheric images, and photospheric magnetic fields are among the types of data used to identify the active centers and flares of the Sun. Forecasting and identification of geomagnetic activity is also discussed. The forecasting technique is described along with the types of users.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NOAA Solar-Terrest. Predictions Proc., Vol. 1; p 1-11
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    Introduction: National geodetic satellite program, part 1 (1977)
    In:  CASI
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    Publication Date: 2006-01-16
    Description: Background for the National Geodetic Satellite Program (NGSP) is presented. An historical summary of the program and its technical structure is given. The technical structure of the program is described in enough detail that the reader can relate the work of the individual contributors to each other and to the NGSP.
    Keywords: GEOPHYSICS
    Type: NASA, Washington Natl. Geodetic Satellite Program, Pt. 1; p 3-85
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    The geographical distribution of lightning: Forestry and range requirements and interests (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: In an attempt to reduce the response time of the initial attack forces to lightning-caused fire, a lightning detection system that effectively locates accurate directions to lightning discharges to over 200 miles from the detection equipment was developed. The system was first tested in Alaska in 1975. Since that time, further development and operational testing led to the implementation of wide area networks. For the 1979 fire season an eight station network in Alaska is to be implemented that will cover virtually all of the lightning-caused fire areas in the state. In the western United States, an eighteen station network that will cover approximately 85% of eleven states is to be implemented. For the first time, large scale ground discharge lightning distribution information is to be available.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Proc.: Workshop on the Need for Lightning Observations from Space; p 110-114
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    Lightning properties and associated emissions (1979)
    In:  CASI
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    Description: A brief overview of the lightning observables and environment is provided. A selective review is presented of those properties of lightning which might be useful as space observables.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Proc.: Workshop on the Need for Lightning Observations from Space; p 25-60
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    Ion chemistry of the middle atmosphere (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Difficulties in making in situ and laboratory measurements of the ion composition of the middle atmosphere are related. An approach is presented which extends theoretical and laboratory results for both negative and positive ions from the D-region down to the stratosphere. In each case, the extension of data from the D-region 'down' to the higher pressure stratosphere is primarily a matter of inquiring into the role of the minor constituents whose absolute concentrations become large enough to allow them to become involved in the ion chemistry.
    Keywords: GEOPHYSICS
    Type: NASA. Goddard Space Flight Center Middle Atmosphere Electrodyn.; p 71-88
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    Solar-terrestrial coupling through atmospheric electricity (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: There are a number of measurements of electrical variations that suggest a solar-terrestrial influence on the global atmospheric electrical circuit. The measurements show variations associated with solar flares, solar magnetic sector boundary crossings, geomagnetic activity, aurorae, differences between ground current and potential gradients at high and low latitudes, and solar cycle variations. The evidence for each variation is examined. Both the experimental evidence and the calculations made with a global model of atmospheric electricity indicate that there is solar-terrestrial coupling through atmospheric electricity which operates by altering the global electric current and field distribution. A global redistribution of currents and fields can be caused by large-scale changes in electrical conductivity, by alteration of the columnar resistance between thunderstorm cloud tops and the ionosphere, or by both. If the columnar resistance is altered above thunderstorms, more current will flow in the global circuit, changing the ionospheric potential and basic circuit variables such as current density and electric fields. The observed variations of currents and fields during solar-induced disturbances are generally less than 50% of mean values near the earth's surface.
    Keywords: GEOPHYSICS
    Type: NASA. Goddard Space Flight Center Middle Atmosphere Electrodyn.; p 89-139
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    Direct energy inputs to the middle atmosphere (1979)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: As a working definition of the extent of the middle atmosphere (MA), the height range from 30 to 100 km was adopted. The neutral and ionic composition and the dynamics within this height range are, for the most part, poorly understood. From available information, the importance of various particle and photon energy sources, including their variability, for ionization of the neutral atmosphere in this height range is assessed. The following topics are discussed: (1) penetration of the MA by particle and electromagnetic energy; (2) ionization sources for the MA; (3) galactic cosmic rays; (4) solar H Ly alpha, other EUV, and X-rays; (5) magnetospheric electrons and bremsstrahlung X-rays; and (6) solar cosmic rays.
    Keywords: GEOPHYSICS
    Type: NASA. Goddard Space Flight Center Middle Atmosphere Electrodyn.; p 43-70
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    Simulation study of a method for analyzing wide field of view radiometer measurements from satellites and some analysis of ESSA 7 data (1977)
    In:  CASI
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    Description: Method of relating wide field of view radiometer measurements from satellites to the Earth longwave flux field is simulated and is used to obtain zonal and global averages of longwave (LW) flux for ESSA 7.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 305-309
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    Comparison of the last two winter season monthly zonal cloud fractions as derived from Nimbus-6 ERB data (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Monthly zonal albedo determinations made by Nimbus-6 ERB were used to form monthly zonal cloud fractions. The Fall-Winter-Spring seasons of 1975-76 are compared with the same seasons 1976-77.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 289-293
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    A summary of Nimbus-6 temperature retrieval accuracy statistics for DST-5 and DST-6 (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Statistics compiled from Nimbus-6 temperature retrievals processed during the 18 August-4 September 1975 DST-5, and the 1 February-4 March 1976 DST-6 are addressed. All statistics were compiled from samples of colocated satellite sounding and radiosonde measurements. The colocation window is 222 km in space and 6 hours in time.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 271-276
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    Mesoscale convergence proceding thunderstorm development determined from cloud motions (1977)
    In:  CASI
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    Description: Convergence was determined from wind vectors derived from cloudtracking on 5 minute interval SMS-2 data using the AOIPS.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 247-251
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    Equations for the dynamics of gust fronts and shock waves (1977)
    In:  CASI
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    Description: Equations are presented for the growth or decay rates of moving and deforming vortex sheets (gust fronts) and shock waves. The equations exhibit a cross-coupling between these two types of surface discontinuity.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 225-227
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    Stereographic cloud heights from SMS/goes imagery (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Stereographic pairs of SMS/GOES images, generated simultaneously by the spin-scan cameras of each of two geostationary satellites (SMS 1 and SMS2), separated by 32 degrees of longitude on February 1, 1975, were analyzed photogrametrically to yield cloud heights with a two-sigma uncertainty of 500 meters. These cloud heights compare favorably with heights of the same clouds measured by radar and IR methods. The same SMS image pairs were used to measure mountaintop heights with a mean deviation of 0.24 km from cartographic values.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 229-233
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    Spectral energetics and predictability studies (1977)
    In:  CASI
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    Description: One and two-dimensional spectral analyses were performed on the GISS general circulation model. The one-dimensional results imply that low eddy kinetic energy is caused by low conversions from the zonal mean kinetic energy. The two-dimensional results confirm that low wave number spectral coefficients approach the predictability limit slower than high wave number coefficients and suggest ways of estimating the rate of approach to the predictability limit.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 329-333
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    ERBSS scanner performance in the presence of radiation directional model errors (1977)
    In:  CASI
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    Description: Simulation studies of the ERBSS scanner were performed to determine the sensitivity of the inferred flux at the top of the atmosphere to radiation directional model errors for candidate scan plane orientations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 311-315
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  • 92
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    Commercial aircraft derived high resolution wind and temperature data from the tropics for FGGE: Implications for NASA (1977)
    In:  CASI
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    Description: Two programs involving over 100 commercial aircraft were initiated to provide global high resolution in-situ windfield and temperature data during the FGGE. The concepts developed for these programs could have important implications for both meteorology and aviation in the near term.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev; p 265-270
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    The data systems test-dress rehearsal for FGGE (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: A series of Data Systems Tests conducted by NASA as a precursor to the First GARP Global Experiment is described. Included is a description of the global data sets acquired and the influence the tests had on the observing system, the data processing plans and research activities of the Global Experiment itself.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 259-263
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    An error analysis of tropical cyclone divergence and vorticity fields derived from satellite cloud winds on the Atmospheric and Oceanographic Information Processing System (AOIPS) (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: An advanced Man-Interactive image and data processing system (AOIPS) was developed to extract basic meteorological parameters from satellite data and to perform further analyses. The errors in the satellite derived cloud wind fields for tropical cyclones are investigated. The propagation of these errors through the AOIPS system and their effects on the analysis of horizontal divergence and relative vorticity are evaluated.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 241-245
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    General solutions for the movement of storms (1977)
    In:  CASI
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    Description: Diagnostic solutions are presented for the displacement velocity of a storm vortex and the velocity of the centroid of the storm's convection.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 219-223
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    Molecular model of ice nucleation (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Two complementary techniques, semi-empirical quantum mechanical calculations and empirical central field pair potential calculations were used in developing a model of the interaction of water with simple surfaces.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 203-206
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    Fast but accurate techniques for calculating radiative terms in numerical atmospheric models and in remote sensing applications (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Methods were developed for calculating radiative terms with relatively high accuracy but with sufficient speed, so that they can be used in numerical atmospheric models or in high volume processing of satellite measured radiances for remote sensing of atmospheric and surface parameters. Comparison with commonly used methods in both types of applications indicate improvements in calculating transmittances of factors between two and three, and in calculating radiances and cooling rates of factors between two and seven.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: 3d NASA Weather and Climate Program Sci. Rev.; p 195-200
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    Mount Agung eruption provides test of a global climate perturbation (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The Mt. Agung volcanic eruption in 1963 is used as a test case to examine the climatic response to a global-scale radiative perturbation of the earth's atmosphere.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 165-169
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    On the interannual variability of the ocean atmospheric system (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: Several feedback mechanisms between ocean and atmosphere are discussed, which seem to have a decisive influence on the interannual variability of the atmosphere, and on climatic fluctuations of a time scale of 10 to 50 years. Satellite requirements to monitor these feedback processes are outlined briefly.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 141-146
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    Nimbus 6 ERB scanner studies for development of Earth Radiation Budget Satellite System (ERBSS) (1977)
    In:  CASI
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    Publication Date: 2006-01-12
    Description: The Nimbus 6 ERB scanner data were conducted to support the development of the Earth Radiation Budget Satellite System project. The ERB data were processed in terms of Earth targets and angular bins and used to evaluate currently available directional radiation models for the longwave and shortwave spectral ranges. Results indicate that available longwave models are adequate for the most part while available shortwave models are inadequate. An effort was initiated to develop improved shortwave models for various cloud conditions and various surface types for cloud free conditions.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA. Goddard Space Flight Center 3d NASA Weather and Climate Program Sci. Rev.; p 147-151
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