The Experts below are selected from a list of 114 Experts worldwide ranked by ideXlab platform

Nasa - One of the best experts on this subject based on the ideXlab platform.

  • Shuttle Imaging Radar-C (SIR-C): Executive summary
    2013
    Co-Authors: Nasa
    Abstract:

    The scientific and technological objectives of the Shuttle Imaging Radar-C (SIR-C) Project are reviewed. Information regarding the implementation philosophy and approach, and the relationship of the project to the overall SIR program is also provided.

  • Shuttle Imaging Radar-C science plan
    2013
    Co-Authors: Nasa
    Abstract:

    The Shuttle Imaging Radar-C (SIR-C) mission will yield new and advanced scientific studies of the Earth. SIR-C will be the first instrument to simultaneously acquire images at L-band and C-band with HH, VV, HV, or VH polarizations, as well as images of the phase difference between HH and VV polarizations. These data will be digitally encoded and recorded using onboard high-density digital tape recorders and will later be digitally processed into images using the JPL Advanced Digital SAR Processor. SIR-C geologic studies include cold-region geomorphology, fluvial geomorphology, rock weathering and erosional processes, tectonics and geologic boundaries, geobotany, and Radar stereogrammetry. Hydrology investigations cover arid, humid, wetland, snow-covered, and high-latitude regions. Additionally, SIR-C will provide the data to identify and map vegetation types, interpret landscape patterns and processes, assess the biophysical properties of plant canopies, and determine the degree of Radar penetration of plant canopies. In oceanography, SIR-C will provide the information necessary to: forecast ocean directional wave spectra; better understand internal wave-current interactions; study the relationship of ocean-bottom features to surface expressions and the correlation of wind signatures to Radar backscatter; and detect current-system boundaries, oceanic fronts, and mesoscale eddies. And, as the first spaceborne SAR with multi-frequency, multipolarization Imaging capabilities, whole new areas of glaciology will be opened for study when SIR-C is flown in a polar orbit.

  • Space transportation system flight 2 OSTA-1 scientific payload data management plan: Addendum
    2013
    Co-Authors: Nasa, Oao Corp.
    Abstract:

    The Shuttle Imaging Radar-A (SIR-A), Shuttle Multispectral Infrared Radiometer (SMIRR), Future Identification and Location Experiment (FILE), Measurement of Air Pollution from Satellites (MAPS), Ocean Color Experiment (OCE), the Night/Day Optical Survey of Lightning (NOSL), and the Heflex Bioengineering Test (HBT) experiments are described.

  • Data Announcement Bulletin: Space Shuttle OSTA 1 payload data
    2013
    Co-Authors: Nasa
    Abstract:

    Data from the scientific payload, OSTA 1, is available. Images of the Earth's surface taken from the Shuttle Imaging Radar-A were processed, and can be obtained in the form of photographic prints, negatives, or positive transparencies. Magnetic tapes containing data for the ocean color experiment and the Shuttle multispectral infrared radiometer are also available.

  • Synthetic Aperture Radar Technology Conference, New Mexico State University, Las Cruces, N. Mex., March 8-10, 1978, Proceedings
    2011
    Co-Authors: Nasa
    Abstract:

    The following aspects of SAR development are discussed: calibration techniques, image simulation and interpretability, antennas, data processing, and system design. Papers are presented on such topics as a postlaunch calibration experiment for the Seasat-A SAR, computer simulation of an orbital SAR system, definition study of the Shuttle Imaging Radar, custom LSI circuits for spaceborne SAR processors, and random sampling adaptively focusing SAR.

R R Forster - One of the best experts on this subject based on the ideXlab platform.

  • Shuttle Imaging Radar sir c x sar reveals near surface properties of the south patagonian icefield
    Journal of Geophysical Research, 1996
    Co-Authors: R R Forster, Bryan L Isacks
    Abstract:

    Shuttle Imaging Radar C/X band synthetic aperture Radar (SIR-C/X-SAR) views of the South Patagonian Icefield in southern Chile and Argentina demonstrate the ability of spaceborne multiparameter Radar to detect climatically driven, intra-annual changes in the snow and ice conditions on glaciers. The SIR-C/X-SAR system aboard space Shuttle Endeavor acquired images during two 11-day missions in April and October 1994. The Radar signatures of differing snow and ice conditions are distinctive and homogeneous over large areas of the ice fields. The signatures are characterized mainly by (1) backscatter amplitude levels, (2) relative amplitudes of the C and L bands (wavelengths of 5.7 and 24 cm, respectively), and (3) polarization properties indicative of volumetric or surface scattering. The Radar signatures are interpreted by correlating the Radar characteristics with elevation of the snow and ice surfaces and with changes in the meteorological conditions. We are able to define four “Radar glacier zones”: (zone A) a relatively dry snow zone with dominant C band returns; (zone B) a moderately wet snow zone with dominant L band returns; (zone C) a wet snow zone with weak returns in all bands; and (zone D) bare ice and/or heavily crevassed surfaces with strong returns in all bands. The spatial changes in the Radar glacier zones between April and October are consistent with colder temperatures recorded in October, producing drier snow conditions at lower elevations than in April.

Bryan L Isacks - One of the best experts on this subject based on the ideXlab platform.

  • Shuttle Imaging Radar sir c x sar reveals near surface properties of the south patagonian icefield
    Journal of Geophysical Research, 1996
    Co-Authors: R R Forster, Bryan L Isacks
    Abstract:

    Shuttle Imaging Radar C/X band synthetic aperture Radar (SIR-C/X-SAR) views of the South Patagonian Icefield in southern Chile and Argentina demonstrate the ability of spaceborne multiparameter Radar to detect climatically driven, intra-annual changes in the snow and ice conditions on glaciers. The SIR-C/X-SAR system aboard space Shuttle Endeavor acquired images during two 11-day missions in April and October 1994. The Radar signatures of differing snow and ice conditions are distinctive and homogeneous over large areas of the ice fields. The signatures are characterized mainly by (1) backscatter amplitude levels, (2) relative amplitudes of the C and L bands (wavelengths of 5.7 and 24 cm, respectively), and (3) polarization properties indicative of volumetric or surface scattering. The Radar signatures are interpreted by correlating the Radar characteristics with elevation of the snow and ice surfaces and with changes in the meteorological conditions. We are able to define four “Radar glacier zones”: (zone A) a relatively dry snow zone with dominant C band returns; (zone B) a moderately wet snow zone with dominant L band returns; (zone C) a wet snow zone with weak returns in all bands; and (zone D) bare ice and/or heavily crevassed surfaces with strong returns in all bands. The spatial changes in the Radar glacier zones between April and October are consistent with colder temperatures recorded in October, producing drier snow conditions at lower elevations than in April.

M Sultan - One of the best experts on this subject based on the ideXlab platform.

  • deformational history of the neoproterozoic keraf zone in ne sudan revealed by Shuttle Imaging Radar
    The Journal of Geology, 1995
    Co-Authors: Mohamed G Abdelsalam, Robert J Stern, H Schandelmeier, M Sultan
    Abstract:

    The location of the boundary between juvenile Neoproterozoic crust of the Arabian-Nubian Shield in the Red Sea Hills and older crust of the Nile craton to the west is defined by the Keraf zone in northern Sudan, but little is known about its deformation history. Shuttle Imaging Radar (SIR-A), Landsat Thematic Mapper (TM), and Large Format Camera (LFC) images, combined with ground investigation, were used to carry out the first detailed study of the Keraf zone. This N-trending zone is ~45 km wide and is defined by multiply deformed carbonate-rich turbidites and volcanogenic sediments. Six deformational phases (D1 to D6) were identified, associated with two tectonic events: (1) D1 and D2 are related to emplacement of SSE-verging ophiolitic nappes due to collision between the Haifa and Bayuda terranes along the ENE-trending Atmur suture at ~800-700 Ma. The Atmur suture marks the site of a former Neoproterozoic oceanic re-entrant that extended WSW from the Mozambique ocean into the interior of the Nile craton...

Mohamed G Abdelsalam - One of the best experts on this subject based on the ideXlab platform.

  • deformational history of the neoproterozoic keraf zone in ne sudan revealed by Shuttle Imaging Radar
    The Journal of Geology, 1995
    Co-Authors: Mohamed G Abdelsalam, Robert J Stern, H Schandelmeier, M Sultan
    Abstract:

    The location of the boundary between juvenile Neoproterozoic crust of the Arabian-Nubian Shield in the Red Sea Hills and older crust of the Nile craton to the west is defined by the Keraf zone in northern Sudan, but little is known about its deformation history. Shuttle Imaging Radar (SIR-A), Landsat Thematic Mapper (TM), and Large Format Camera (LFC) images, combined with ground investigation, were used to carry out the first detailed study of the Keraf zone. This N-trending zone is ~45 km wide and is defined by multiply deformed carbonate-rich turbidites and volcanogenic sediments. Six deformational phases (D1 to D6) were identified, associated with two tectonic events: (1) D1 and D2 are related to emplacement of SSE-verging ophiolitic nappes due to collision between the Haifa and Bayuda terranes along the ENE-trending Atmur suture at ~800-700 Ma. The Atmur suture marks the site of a former Neoproterozoic oceanic re-entrant that extended WSW from the Mozambique ocean into the interior of the Nile craton...