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Calibration and validation of reprocessed HY-2A altimeter wave height measurements using data from Buoys, Jason-2, Cryosat-2, and SARAL/AltiKa
Jiang, Maofei; Xu, Ke; Liu, Yalong; Jiang, Maofei (jiangmaofei1@163.com)
Department微波遥感部
Source PublicationJournal of Atmospheric and Oceanic Technology
2018
Volume35Issue:6Pages:1331-1352
ISSN0739-0572
Language英语
AbstractThe Haiyang-2A (HY-2A) satellite is China's first ocean dynamic environment satellite, and the radar altimeter is one of its main payloads. In this study the HY-2A altimeter sensor interim geophysical dataset records (SIGDR) data are reprocessed to obtain better significant wave height (Hs) measurements over a period of more than four years (from 1 October 2011 to 15 March 2016). The reprocessed HY-2A Hsmeasurements are calibrated and validated using National Data Buoy Center (NDBC) buoys and several operating altimeters: Joint Altimetry Satellite Oceanography Network-2 (Jason-2), CryoSat-2, and Satellite with Argos Data Collection System and Ka-Band Altimeter (SARAL/ALtiKa) The final results of buoys and cross-altimeter comparisons show that the accuracy of the reprocessed HY-2A Hsmeasurements is significantly improved with respect to the Hsmeasurements in the operational HY-2A interim geophysical data record (IGDR) publicly distributed by the National Satellite Ocean Application Service (NSOAS), State Oceanic Administration (SOA) of China. Compared with the NDBC Hsmeasurements, the reprocessed HY-2A Hsmeasurements show a root-mean-square error (RMSE) of 0.215 m with a positive bias of 0.117 m. After calibrating with the two-branched corrections, the RMSE for the reprocessed HY-2A Hsmeasurements is reduced to 0.173 m, which is lower than those for the calibrated HY-2A IGDR, Jason-2, Cryosat-2, and SARAL measurements with an RMSE of 0.278, 0.233, 0.239, and 0.184 m, respectively. Long-term validation of the altimeter Hsmeasurements shows that the reprocessed HY-2A Hsmeasurements after calibration are stable with respect to the buoys and three other altimeters over the entire period. The reprocessed HY-2A Hsmeasurements are expected to improve the practical applicability of HY-2A Hsmeasurements significantly. © 2018 American Meteorological Society.
Indexed ByEI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6369
Collection微波遥感部
Corresponding AuthorJiang, Maofei (jiangmaofei1@163.com)
Recommended Citation
GB/T 7714
Jiang, Maofei,Xu, Ke,Liu, Yalong,et al. Calibration and validation of reprocessed HY-2A altimeter wave height measurements using data from Buoys, Jason-2, Cryosat-2, and SARAL/AltiKa[J]. Journal of Atmospheric and Oceanic Technology,2018,35(6):1331-1352.
APA Jiang, Maofei,Xu, Ke,Liu, Yalong,&Jiang, Maofei .(2018).Calibration and validation of reprocessed HY-2A altimeter wave height measurements using data from Buoys, Jason-2, Cryosat-2, and SARAL/AltiKa.Journal of Atmospheric and Oceanic Technology,35(6),1331-1352.
MLA Jiang, Maofei,et al."Calibration and validation of reprocessed HY-2A altimeter wave height measurements using data from Buoys, Jason-2, Cryosat-2, and SARAL/AltiKa".Journal of Atmospheric and Oceanic Technology 35.6(2018):1331-1352.
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