TY - JOUR
T1 - Cone Metrics
T2 - A New Tool for the Intercomparison of Scatterometer Records
AU - Rivas, Maria Belmonte
AU - Stoffelen, Ad
AU - Verspeek, Jeroen
AU - Verhoef, Anton
AU - Neyt, Xavier
AU - Anderson, Craig
N1 - Publisher Copyright:
© 2008-2012 IEEE.
PY - 2017/5
Y1 - 2017/5
N2 - With an eye on the generation of a long-term climate record of ocean winds, soil moisture, and sea ice extents across the C-band ERS and ASCAT scatterometer spans, a new calibration tool termed cone metrics has been developed. The new method is based on monitoring changes in the location and shape of the surface of maximum density of ocean backscatter measurements, also known as 'the wind cone.' The cone metrics technique complements established calibration approaches, such as rain forest and NWP ocean calibration, through the characterization of linear as well as nonlinear beam offsets, the latter via wind cone deformations. Given instrument evolution, proven stability, and the monitoring by transponders, we take ASCAT-A data over 2013 as absolute calibration reference. This paper describes the new method and its application as intercalibration tool in the context of the reprocessing activities for ERS-1 and ERS-2. Cone metrics succeeds at establishing the linear and nonlinear corrections necessary to homogenize the ASCAT and ERS C-band records down to 0.05 dB.
AB - With an eye on the generation of a long-term climate record of ocean winds, soil moisture, and sea ice extents across the C-band ERS and ASCAT scatterometer spans, a new calibration tool termed cone metrics has been developed. The new method is based on monitoring changes in the location and shape of the surface of maximum density of ocean backscatter measurements, also known as 'the wind cone.' The cone metrics technique complements established calibration approaches, such as rain forest and NWP ocean calibration, through the characterization of linear as well as nonlinear beam offsets, the latter via wind cone deformations. Given instrument evolution, proven stability, and the monitoring by transponders, we take ASCAT-A data over 2013 as absolute calibration reference. This paper describes the new method and its application as intercalibration tool in the context of the reprocessing activities for ERS-1 and ERS-2. Cone metrics succeeds at establishing the linear and nonlinear corrections necessary to homogenize the ASCAT and ERS C-band records down to 0.05 dB.
KW - Antenna radiation pattern
KW - calibration
KW - radar signal processing
UR - http://www.scopus.com/inward/record.url?scp=85011659588&partnerID=8YFLogxK
U2 - 10.1109/JSTARS.2017.2647842
DO - 10.1109/JSTARS.2017.2647842
M3 - Article
AN - SCOPUS:85011659588
SN - 1939-1404
VL - 10
SP - 2195
EP - 2204
JO - IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
JF - IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
IS - 5
M1 - 7839297
ER -