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Aquarius whole range calibration: Celestial Sky, ocean, and land targets
- Source :
- 2014 13th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad).
- Publication Year :
- 2014
- Publisher :
- IEEE, 2014.
-
Abstract
- Aquarius is a spaceborne instrument that uses L-band radiometers to monitor sea surface salinity globally. Other applications of its data over land and the cryosphere are being developed. Combining its measurements with existing and upcoming L-band sensors will allow for long term studies. For that purpose, the radiometers calibration is critical. Aquarius measurements are currently calibrated over the oceans. They have been found too cold at the low end (celestial sky) of the brightness temperature scale, and too warm at the warm end (land and ice). We assess the impact of the antenna pattern model on the biases and propose a correction. We re-calibrate Aquarius measurements using the corrected antenna pattern and measurements over the Sky and oceans. The performances of the new calibration are evaluated using measurements over well instrument land sites.
- Subjects :
- L band
Radiometer
Meteorology
media_common.quotation_subject
Astrophysics::Instrumentation and Methods for Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Physics::Geophysics
Geography
Sky brightness
Sky
Brightness temperature
Calibration
Cryosphere
Radiometry
Astrophysics::Galaxy Astrophysics
Physics::Atmospheric and Oceanic Physics
media_common
Remote sensing
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2014 13th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)
- Accession number :
- edsair.doi...........10181fa83de2f16100b3a1b554ae81d9