Mapping of the DOME-C area in Antarctica by an airborne L-band radiometer
A 350 × 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 close to the yearly mean temperature — well suited for calibration checks for s...
Published in: | 2014 IEEE Geoscience and Remote Sensing Symposium |
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Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
IEEE
2014
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Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/5c6db17e-4dc6-4eb2-b570-40e07af95e34 https://doi.org/10.1109/IGARSS.2014.6947264 |
Summary: | A 350 × 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 close to the yearly mean temperature — well suited for calibration checks for spaceborne instruments like SMOS, Aquarius, and SMAP. The measured brightness temperatures shows unexpected variations like 8 K variation on an East-West profile through Concordia, and in certain cases a slope of almost 1 K per km. Comparing the measured brightness temperature map with bottom topography reveals a convincing correlation. Simulations show that variations in bedrock topography can indeed modulate the brightness temperature appropriately to explain the observed variations. |
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