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  • EARTH RESOURCES AND REMOTE SENSING  (6)
  • METEOROLOGY AND CLIMATOLOGY  (5)
  • 2005-2009
  • 1980-1984  (11)
  • 1935-1939
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  • 1
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    A numerical evaluation of TIROS-N and NOAA-6 analyses in a high resolution limited area model (1981)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-18
    Beschreibung: Vertical temperature profiles derived from TIROS-N and NOAA-6 radiance measurements were used to create separate analyses for the period 0000 GMT 6 January to 0000 GMT 7 January 1980. The 0000 GMT 6 January satellite analyses and a conventional analysis were used to initialize and run the University of Wisconsin's version of the Australian Region Primitive Equations model. Forecasts based on conventional analyses were used to evaluate the forecasts based only on satellite upper air data. The forecasts based only on TIROS-N or NOAA-6 data did reasonably well in locating the main trough and ridge positions. The satellite initial analyses and forecasts revealed errors correlated to the synoptic situation. The trough in both TIROS-N and NOAA-6 forecasts which was initially too warm remained too warm as it propagated eastward during the forecast period. Thus, it is unlikely that the operational satellite data will improve forecasts in a data dense region. However, in regions of poor data coverage, the satellite data should have a beneficial effect on numerical forecasts.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: Optimum Employment of Satellite Indirect Soundings as Numerical Model Input; p 82-108
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 2
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    Evaluation of TIROS-N and NOAA-6 satellite data: Comparisons of colocated soundings and analyses for a January case (1981)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-18
    Beschreibung: An early January 1980 synoptic situation was used in evaluating the performance of TIROS-N and NOAA-6 operational temperature soundings. Visual and statistical comparisons of temperature and thickness fields were employed to determine the effects of manual screening of the satellite soundings and measure the accuracy of both the satellite soundings and analyses derived from them. Comparisons between the performance of TIROS-N and NOAA-6 were emphasized. Both satellites were able to correctly position the major troughs and ridges. Gradients were underestimated though, with troughs markedly too warm and ridges slightly too cold. The poorest data occurred near the surface and tropopause as reflected by larger standard deviations in those layers. The performance of TIROS-N was slightly superior to that of NOAA-6.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: Optimum Employment of Satellite Indirect Soundings as Numerical Model Input; p 51-81
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 3
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    The Use of Available Potential Energy to Evaluate Two GLAS FGGE Data Sets (1984)
    In:  CASI
    Details
    Publikationsdatum: 2014-09-16
    Beschreibung: Meteorological data derived from satellites provided an essential component of the FGGE data sets, especially in data sparse regions of the globe. The impact of satellite derived observations on objective analyses and numerical model predictions are investigated. The FGGE data sets and resulting numerical forecasts and the ability to define the available potential energy of the atmosphere, and its relationship to synoptic scale features such as extratropical cyclones are studied.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: NASA. Goddard Space Flight Center Global Scale Atmospheric Processes Res. Program Review; p 115
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
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    Geobotanical discrimination of ultramafic parent materials An evaluation of remote sensing techniques (1984)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-18
    Beschreibung: Color and color infrared aerial photography and imagery acquired from a Daedalus DEI-1260 multispectral airborne scanner were employed in an investigation to discriminate ultramafic rock types in a test site in southwest Oregon. An analysis of the relationships between vegetation characteristics and parent materials was performed using a vegetation classification and map developed for the project, lithologic information derived from published geologic maps of the region, and terrain information gathered in the field. Several analytical methods, including visual image analysis, band ratioing, principal components analysis, and contrast enhancement and subsequent color composite generation were used in the investigation. There was a close correspondence between vegetation types and major rock types. These were readily discriminated by the remote sensing techniques. It was found that ultramafic rock types were separable from non-ultramafic rock types and serpentine was distinguishable from non-serpentinized peridotite. Further investigations involving spectroradiometric and digital classification techniques are being performed to further identify rock types and to discriminate chromium and nickel-bearing rock types.
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 5
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    An evaluation of soundings, analyses and model forecasts derived from TIROS-N and NOAA-6 satellite data (1983)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: TIROS-N and NOAA-6 temperature soundings over North America during three days in January 1980, and synoptic analyses and numerical-model forecasts derived from them, are compared with conventional data and analyses from NMC's limited-area fine-mesh model (LFM). The collocated sounding comparison revealed significant errors, especially near the surface and the tropopause. Satellite-derived thermal gradients were found to be weak, and thickness-analysis difference fields to propagate eastward, suggesting that sounding errors are correlated with synoptic patterns. The same pattern of anomalies is seen in the model forecasts. More detailed determinations of the correlation detected here could be used to optimize the assimilation of satellite soundings to conventional data.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: Monthly Weather Review (ISSN 0027-0644); 111; March 19
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 6
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    Optimum employment of satellite indirect soundings as numerical model input (1981)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The characteristics of satellite-derived temperature soundings that would significantly affect their use as input for numerical weather prediction models were examined. Independent evaluations of satellite soundings were emphasized to better define error characteristics. Results of a Nimbus-6 sounding study reveal an underestimation of the strength of synoptic scale troughs and ridges, and associated gradients in isobaric height and temperature fields. The most significant errors occurred near the Earth's surface and the tropopause. Soundings from the TIROS-N and NOAA-6 satellites were also evaluated. Results again showed an underestimation of upper level trough amplitudes leading to weaker thermal gradient depictions in satellite-only fields. These errors show a definite correlation to the synoptic flow patterns. In a satellite-only analysis used to initialize a numerical model forecast, it was found that these synoptically correlated errors were retained in the forecast sequence.
    Schlagwort(e): METEOROLOGY AND CLIMATOLOGY
    Materialart: NASA-CR-168509
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 7
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    Detection and damage assessment of citrus tree losses with aerial color infrared photography /ACIR/ (1981)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Detection and disease damage assessment of citrus tree losses in a Florida citrus grove were made by establishing a registration (grove site location) coordinate system, developing a damage assessment system, and testing sequential aerial color infrared (ACIR) photography at the scale of 1 in. = 333 ft (2.5 cm = 100 m) during the winter, spring, and summer seasons of 1978 and spring of 1979. Spring photography was the easiest to photo interpret, showed the greatest differences between healthy and diseased trees, and had the least shadow and background interference for photo interpretation. Trees showing slight disease damage were detected in ACIR before they were found in ground surveys.
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Materialart: Color aerial photography in the plant sciences and related fields; Apr 21, 1981 - Apr 23, 1981; Luray, VA
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 8
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    Use of Thematic Mapper for water quality assessment (1984)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: The evaluation of simulated TM data obtained on an ER-2 aircraft at twenty-five predesignated sample sites for mapping water quality factors such as conductivity, pH, suspended solids, turbidity, temperature, and depth, is discussed. Using a multiple regression for the seven TM bands, an equation is developed for the suspended solids. TM bands 1, 2, 3, 4, and 6 are used with logarithm conductivity in a multiple regression. The assessment of regression equations for a high coefficient of determination (R-squared) and statistical significance is considered. Confidence intervals about the mean regression point are calculated in order to assess the robustness of the regressions used for mapping conductivity, turbidity, and suspended solids, and by regressing random subsamples of sites and comparing the resultant range of R-squared, cross validation is conducted.
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Materialart: Machine processing of remotely sensed data: Thematic Mapper data and geographic information systems; Jun 12, 1984 - Jun 14, 1984; West Lafayette, IN
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 9
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    Remote sensing of the marginal ice zone during Marginal Ice Zone Experiment (MIZEX) 83 (1984)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: The remote sensing techniques utilized in the Marginal Ice Zone Experiment (MIZEX) to study the physical characteristics and geophysical processes of the Fram Strait Region of the Greenland Sea are described. The studies, which utilized satellites, aircraft, helicopters, and ship and ground-based remote sensors, focused on the use of microwave remote sensors. Results indicate that remote sensors can provide marginal ice zone characteristics which include ice edge and ice boundary locations, ice types and concentration, ice deformation, ice kinematics, gravity waves and swell (in the water and the ice), location of internal wave fields, location of eddies and current boundaries, surface currents and sea surface winds.
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Materialart: ESA IGARSS 84. Remote Sensing: From Res. towards Operational Use, Vol. 1; p 339-346
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Effects of altitude, focal length, and filter combinations on color infrared photography of citrus groves (1981)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Schlagwort(e): EARTH RESOURCES AND REMOTE SENSING
    Materialart: Annual Meeting; Feb 22, 1981 - Feb 27, 1981; Washington, DC
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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