Calibration and validation of reprocessed HY-2A altimeter wave height measurements using data from Buoys, Jason-2, Cryosat-2, and SARAL/AltiKa

	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)
刊名	Journal of Atmospheric and Oceanic Technology
	2018
卷号	35 期号:6 页码:1331-1352
ISSN号	0739-0572
英文摘要	The 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.
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/6369]
专题	国家空间科学中心_微波遥感部
通讯作者	Jiang, Maofei (jiangmaofei1@163.com)
推荐引用方式 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.