Journal article
Airborne L-band radiometer mapping of the dome-C area in Antarctica
A 350 km × 350 km area near the Concordia station on the high plateau of Dome-C in Antarctica has been mapped by an airborne L-band radiometer system. The area was expected to display a rather uniform brightness temperature (TB) close to the yearly mean temperature-well suited for calibration checks for spaceborne instruments like SMOS, Aquarius, and SMAP.
The measured TBs show unexpected variations like 8-K variation over 240 km on an east-west profile through Concordia, and in certain local cases, a slope of about 0.7 K/km. Comparing the measured TB map with bottom topography reveals a convincing correlation. Simulations show that variations in bedrock topography can indeed modulate the TB appropriately to explain the observed variations.
It is concluded that use of the Dome-C area for calibration check of spaceborne radiometers is indeed viable, but with caution-especially when comparing instruments with different spatial resolutions.
Language: | English |
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Publisher: | IEEE |
Year: | 2015 |
Pages: | 3656-3664 |
ISSN: | 21511535 and 19391404 |
Types: | Journal article |
DOI: | 10.1109/JSTARS.2015.2425039 |
ORCIDs: | Skou, Niels , Kristensen, Steen Savstrup , Søbjærg, Sten Schmidl and Balling, Jan E. |
Aircraft Antennas Calibration L-band Radiometry Sun radiometer