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Spaceborne radiometric measurements at L-band from the Aquarius instrument are compared to numerical model simulation. The empirical calibration of the data, performed over oceans only, is checked for consistency with measurements over the celestial sky. The calibration for the horizontal polarization is found to extend properly to the cold sky temperature, but the vertical polarization exhibit large...
Spaceborne radiometric measurements at L-band from the Aquarius instrument are compared to numerical model simulation. A calibration bias is estimated: of the order of 3K to 5K in vertical polarization, and of the order of 1.5 K or less in horizontal polarization. A bias temporal drift of about 1 K over five months is identified for all beams and polarizations. Measurements/model comparisons are also...
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