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Shuttle imaging radar experiment.

C Elachi, W E Brown, J B Cimino

    Science (New York, N.Y.)
    |December 3, 1982
    PubMed
    Summary
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    Shuttle Imaging Radar-Array (SIR-A) mapped 10 million sq km of Earth, revealing geologic and structural features. Combining SIR-A with Seasat data enhanced surface property analysis, including topography and roughness.

    Area of Science:

    • Geology
    • Remote Sensing
    • Oceanography

    Background:

    • The Shuttle Imaging Radar-Array (SIR-A) mission aimed to acquire radar imagery of diverse geological terrains.
    • Previous radar missions provided foundational data for Earth surface observation.

    Purpose of the Study:

    • To assess the capability of SIR-A in imaging geological and geomorphic features across various climate zones.
    • To evaluate the synergistic use of SIR-A and Seasat data for characterizing surface physical properties.
    • To identify and analyze oceanographic features using radar imaging.

    Main Methods:

    • Acquisition of radar images by SIR-A covering approximately 10 million square kilometers.
    • Analysis of structural and geomorphic features (faults, folds, outcrops, dunes) in tropical and arid regions.

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  • Integration of SIR-A data with Seasat imagery to derive topography and roughness information.
  • Observation and analysis of ocean features, such as internal waves.

    • Main Results:

    • SIR-A successfully imaged extensive geological areas, clearly depicting structural and geomorphic elements.
    • Features like faults, folds, outcrops, and dunes were identifiable in both tropical and arid environments.
    • Combined SIR-A and Seasat data provided enhanced insights into surface topography and roughness.
    • Significant ocean features, including large internal waves in the Andaman Sea, were detected.

    Conclusions:

    • SIR-A is a valuable tool for geological mapping and the identification of surface features globally.
    • The combination of different radar datasets (SIR-A and Seasat) improves the understanding of Earth's surface characteristics.
    • Radar remote sensing offers unique capabilities for observing both terrestrial and marine environments.