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  • 1
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    SAR Ambiguity Study for the Cassini Radar (1993)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: The Cassini Radar's synthetic aperture radar (SAR) ambiguity analysis is unique with respect to other spaceborne SAR ambiguity analyses owing to the non-orbiting spacecraft trajectory, asymmetric antenna pattern, and burst mode of data collection. By properly varying the pointing, burst mode timing, and radar parameters along the trajectory this study shows that the signal-to-ambiguity ratio of better than 15 dB can be achieved for all images obtained by the Cassini Radar.
    Keywords: Earth Resources and Remote Sensing
    Type: IEEE IGARSS '93 Geoscience and Remote Sensing; Tokyo; Japan
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Improvements to the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) Calibration System (1994)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: As a continuing effort to increase the calibration accuracy of the AVIRIS data a number of recent improvements have been implemented and are in the process of being tested during the 1994 flight season. These include the following innovations: A direct observation of a laboratory radiance standard is now used to double check the wide field-of-view calibration via an integrating sphere source. Launch site field calibration of the AVIRIS sensor is now being planned to augment the laboratory and inflight calibration. Modification to a dry air conditioning unit has been made to enable ground calibration at flight operating temperatures. One hundred lines of dark imagery has been added to the end of each flight line to assist in the analysis and removal of residual coherent noise. The intensity of the onboard calibration lamp has been modified to improve response in the blue end of the spectrum. Novel spectral filters have been installed in the onboard calibration source.
    Keywords: Earth Resources and Remote Sensing
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Development Status of Cassini Radar For Remote Sensing of Titan (1994)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: Cassini Radar is a multimode rada instrument designed to probe the optically inaccessible surface of Titan, Saturn's largest moon. The individual modes will allow surface imaging, surface emissivity measurements. Recently, the breadboard model of this instrument was built and has undergone a series of functional and perfomance tests. The results obtained from these tests indicate that the instrument design is satisfactory and that the various required performance parameters are suffieciently met.
    Keywords: Earth Resources and Remote Sensing
    Format: text
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    NASA TECHNICAL REPORTS
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