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Related Experiment Videos

Infrared radiometry experiment on mariner 9.

S C Chase, H Hatzenbeler, H H Kieffer

    Science (New York, N.Y.)
    |January 21, 1972
    PubMed
    Summary
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    Mariner 9 infrared radiometer measurements show significant differences in Mars

    Area of Science:

    • Planetary Science
    • Infrared Spectroscopy
    • Atmospheric Science

    Background:

    • Previous infrared radiometer data from Mariners 6 and 7 provided baseline thermal emission measurements for Mars.
    • Understanding Mars' atmospheric composition and thermal properties is crucial for planetary exploration.

    Purpose of the Study:

    • To analyze discrepancies in infrared brightness temperatures measured by the Mariner 9 mission compared to earlier Mariner missions.
    • To investigate the role of atmospheric dust in Mars' thermal emission.

    Main Methods:

    • Utilized infrared radiometer data from the Mariner 9 spacecraft.
    • Analyzed brightness temperatures at 10 and 20 micrometers.
    • Compared Mariner 9 data with results from Mariners 6 and 7.

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    Main Results:

    • Observed substantial differences in brightness temperatures between Mariner 9 and earlier missions.
    • Identified a significant latitude-dependent contribution of atmospheric dust to thermal emission.
    • Quantified the impact of dust on Mars' infrared spectral signature.

    Conclusions:

    • Atmospheric dust significantly influences Mars' observed thermal emission.
    • Latitude-dependent dust distribution is a key factor in thermal variations.
    • Mariner 9 data reveals a more complex thermal profile than previously understood.