ASCAT Scatterometer Ocean Calibration

A new scatterometer, the so-called Advanced scatterometer (ASCAT), onboard MetOp-A satellite was successfully launched on October 19 2006. During the commissioning phase one of the main goals is to accurately calibrate the instrument. The radar backscatter has been calibrated using three ground-base...

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Bibliographic Details
Main Authors: Verspeek, J., Stoffelen, A., Portabella, M., Verhoef, A., Vogelzang, J.
Format: Conference Proceeding
Language:English
Subjects:
ASCAT
Backscatter
Calibration
Geophysical measurements
Instruments
ocean
Oceans
Radar measurements
Satellites
scatterometer
Sea measurements
Spaceborne radar
Transponders
wind
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Description
Summary:A new scatterometer, the so-called Advanced scatterometer (ASCAT), onboard MetOp-A satellite was successfully launched on October 19 2006. During the commissioning phase one of the main goals is to accurately calibrate the instrument. The radar backscatter has been calibrated using three ground-based transponders in February 2008. Calibration of the ASCAT retrieved winds over the ocean is done by comparing the backscatter measurement with backscatter values derived from collocated NWP winds. Using calibration corrections, ASCAT winds are produced routinely at KNMI since March 2007 as the first MetOp-A geophysical product. Ocean calibration results and scatterometer wind speed statistics show that the Ocean and Sea Ice Satellite Application Facility (OSISAF) wind product is of high quality.
ISSN:2153-6996
2153-7003
DOI:10.1109/IGARSS.2008.4780074