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Seasat altimeter calibration: initial results.

B D Tapley, G H Born, H H Hagar

    Science (New York, N.Y.)
    |June 29, 1979
    PubMed
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    Radar altimeter data meets precision specifications for measuring spacecraft height and ocean wave height. This technology is now ready for advanced oceanographic research and practical applications.

    Area of Science:

    • Oceanography
    • Remote Sensing
    • Geophysics

    Background:

    • Radar altimetry has evolved through multiple space missions, including Skylab, GEOS-3, and Seasat.
    • Previous missions have established a foundation for precise oceanographic measurements.

    Purpose of the Study:

    • To evaluate the performance of a radar altimeter against its predefined specifications.
    • To determine the readiness of radar altimeter technology for quantitative oceanographic studies.

    Main Methods:

    • Preliminary analysis of data acquired from a radar altimeter.
    • Verification of measurements for spacecraft height above the ocean surface.
    • Assessment of significant wave height measurements.

    Main Results:

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    • The radar altimeter successfully met its specifications for measuring spacecraft height with +/- 10 cm accuracy.
    • Significant wave height measurements achieved the target precision of +/- 0.5 meters.
    • Data analysis confirmed the instrument's reliable performance.

    Conclusions:

    • The radar altimeter has reached a significant level of precision, meeting all key performance specifications.
    • The validated precision enables the use of radar altimeter data for critical quantitative oceanographic investigations.
    • The instrument is deemed suitable for various practical oceanographic applications.