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  • 1
    Publication Date: 2018-06-08
    Keywords: Earth Resources and Remote Sensing
    Type: International Conference and Workshops on Applied Geologic Remote Sensing; Las Vegas, NV; United States
    Format: text
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  • 2
    Publication Date: 2013-08-31
    Description: During September 3 to 5, 1979, a multisensor oceanographic experiment was conducted off Cape Mendocino, California. The purpose of this experiment was to validate the use of remote sensing techniques over an area along the U.S. west coast where coasted upwelling is known to be intense. Remotely sensed mutlispectral data, including thermal infrared imagery, were collected above an upwelling feature off Cape Mendocino. Data were acquired from the TIRNOS-N and NOAA-6 polar orbiting satellites, the NASA Ames Research Center's high altitude U-2 aircraft, and a U.S. Coast Guard C-130 aircraft. Supporting surface truth data over the same feature were collected aboard the National Oceanic and Atmospheric Administration (NOAA) ship, OCEANOGRAPHER. Atmospheric soundings were also taken aboard the ship. The results indicate that shipboard measurements of sea surface temperatures can be reproduction within 1 C or better through remote observation of absolute infrared radiance values (whether measured aboard the NOAA polar orbiting satellite, the U-2 aircraft, or the Coast Guard aircraft) by using appropriate atmospheric corrections. Also, the patterns of sea surface temperature which were derived independently from the various remote platforms provide a consistent interpretation of the surface temperature field.
    Keywords: OCEANOGRAPHY
    Type: NASA-TM-86712 , NAS 1.15:86712 , REPT-85208
    Format: application/pdf
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  • 3
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    In:  CASI
    Publication Date: 2013-08-31
    Description: A methodology for adjusting baseline cost estimates according to project schedule changes is described. An algorithm which performs a linear expansion or contraction of the baseline project resource distribution in proportion to the project schedule expansion or contraction is presented. Input to the algorithm consists of the deck of cards (PACE input data) prepared for the baseline project schedule as well as a specification of the nature of the baseline schedule change. Output of the algorithm is a new deck of cards with all work breakdown structure block and element of cost estimates redistributed for the new project schedule. This new deck can be processed through PACE to produce a detailed cost estimate for the new schedule.
    Keywords: ADMINISTRATION AND MANAGEMENT
    Type: NASA-TM-82419
    Format: application/pdf
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  • 4
    Publication Date: 2013-08-31
    Description: Accomplishments and directions for further research aimed at developing methods for assessing a candidate design of an avionic computer with respect to susceptability to lightning upset are reported. Emphasis is on fault tolerant computers. Both lightning stress and shielding are covered in a review of the electromagnetic environment. Stress characterization, system characterization, upset detection, and positive and negative design features are considered. A first cut theory of comparing candidate designs is presented including tests of comparative susceptability as well as its analysis and simulation. An approach to lightning induced transient fault effects is included.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Format: application/pdf
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  • 5
    Publication Date: 2017-06-27
    Description: Proposed test of theory of gravitation by an unshielded earth orbiting gyroscope using passive telemetry
    Keywords: PHYSICS, GENERAL
    Type: NASA-CR-94933 , R-378
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  • 6
    Publication Date: 2017-06-26
    Description: Nodal regression of orbit effect on gravity precession of gyroscopic satellite
    Keywords: SPACE SCIENCES
    Type: NASA-CR-78875 , R-309
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  • 7
    Publication Date: 2016-06-07
    Description: A unique approach to onboard processing was developed that is capable of acquiring high quality image data for users in near real time. The approach is divided into two steps: the development of an onboard cloud detection system; and the development of a landmark tracker. The results of these two developments are outlined and the requirements of an operational guidance and control system capable of providing continuous estimation of the sensor boresight position are summarized.
    Keywords: ASTRODYNAMICS
    Type: NASA. Goddard Space Flight Center Fifth Ann. Flight Mech.(Estimation Theory Symp.; 17 p
    Format: application/pdf
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  • 8
    Publication Date: 2017-06-27
    Description: Effect of nodal regression of orbit on gravity gradient precession of gyroscopic satellite in testing general theory of relativity
    Keywords: SPACE SCIENCES
    Type: NASA-CR-82592 , R-309
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  • 9
    Publication Date: 2018-12-01
    Description: Two complementary sensors, the DAEDALUS DEI-1260 Multispectral Scanner aboard the NASA U-2 aircraft and the Advanced Very High Resolution Radiometer aboard National Oceanographic and Atmospheric Administration orbiting satellites were tested for their applicability in monitoring and predicting parameters such as fire location, temperature and rate of spread, soil heating and cooling rates, and plume characteristics and dimensions. In addition, the satellite system was tested for its ability to extend the relationships found between fire characteristics and biospheric consequences to regional and global scales. An overall system design is presented, and special requirements are documented for the application of this system for fire research and management.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: AIAA PAPER 87-0187
    Format: text
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  • 10
    Publication Date: 2010-06-21
    Description: The Lewisian Gneiss Complex of northwestern Scotland consists of Archaean gneisses, variably reworked during the Proterozoic. It can be divided into three districts - a central granulite-facies district between districts of amphibolite-facies gneiss to the north and south. Recent work has interpreted these districts in terms of separate terranes, initiating a controversy that has implications for how Precambrian rocks are understood worldwide. The northern district of the Lewisian Gneiss Complex (the Rhiconich terrane) is separated from the central district (the Assynt terrane) by a broad ductile shear zone known as the Laxford Shear Zone. This paper reviews the geology of the Laxford Shear Zone, clarifying field relationships and discussing other evidence, to consider whether or not it does indeed represent a terrane boundary. A detailed review of field, geochemical and geochronological evidence supports the recognition of the separate Assynt and Rhiconich terranes. Mafic dykes (the Scourie Dyke Swarm) and granitoids, of Palaeoproterozoic age, occur on both sides of the Laxford Shear Zone and thus the terranes were most probably juxtaposed during the late Archaean to early Palaeoproterozoic Inverian event. Subsequently, the less-competent, more-hydrous amphibolite-facies gneisses of the Rhiconich terrane were affected by later Palaeoproterozoic (Laxfordian) deformation and partial melting, to a greater extent than the more-competent granulite-facies gneisses of the Assynt terrane.
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