These spectrograms from the MARSIS instrument on the European Space Agency Mars Express orbiter show the intensity of radar echo in Mars far-northern ionosphere at three times on Oct. 19 and 20, 2014.
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Details
Title: Radar-Detected Change in Martian Near-Polar Ionosphere After Comet Flyby
Creator: ASI/NASA/ESA/JPL/Univ. of Rome/Univ. of Iowa
Date Created: 2014-11-07
Rights: JPL
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