Evaluation of HY-2A satellite-borne water vapor radiometer with shipborne GPS and GLONASS observations over the Indian Ocean

doi:10.1007/s10291-019-0876-5

	Evaluation of HY-2A satellite-borne water vapor radiometer with shipborne GPS and GLONASS observations over the Indian Ocean
	Liu, Yang 1; Liu, Yanxiong 1; Chen, Guanxu 1,2; Wu, Zhilu 1,3
刊名	GPS SOLUTIONS
	2019-07
卷号	23 期号:3
关键词	HY-2A Marine water vapor Shipborne GNSS Spaceborne microwave radiometer Uncertainty evaluation
ISSN号	1080-5370
DOI	10.1007/s10291-019-0876-5
英文摘要	The Chinese Haiyang-2A (HY-2A) altimetry satellite is equipped with a calibration microwave radiometer (CMR) for correcting atmospheric water vapor path delay in radar altimeter observations. To evaluate the satellite-borne CMR, we retrieved 1Hz high-frequency precipitable water vapor (PWV) using shipborne GPS and GLONASS from a two-month cruise in the Indian Ocean. This open-sea evaluation of the satellite-borne radiometer is free of the contamination of the satellite footprints induced by coastal lands, which occurs inevitably in ground-based or coastal stations. The estimates and errors of the retrieved PWV from shipborne GNSS kinematic precise point positioning were analyzed and then compared to the CMR-retrieved PWV. The results show that the shipborne GNSS kinematic precise point positioning can obtain marine PWV with an uncertainty of about 2.8mm. When the HY-2A sub-satellite point and the ship cross, the HY-2A CMR-retrieved PWV is in good agreement with the GNSS PWV with the difference of about 0.8mm, which demonstrates that the HY-2A satellite can contribute high-precision precipitable water vapor measurements to weather and atmospheric studies.
资助项目	China Scholarship Council (CSC)[201706710115]
WOS关键词	TROPOSPHERIC PATH DELAY ; MICROWAVE RADIOMETER ; PRECIPITABLE WATER ; CALIBRATION ; GNSS ; TEMPERATURE ; METEOROLOGY ; ERRORS ; VALIDATION ; RADIOSONDE
WOS研究方向	Remote Sensing
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000472182100004
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/24612]
专题	自然资源部第一海洋研究所
通讯作者	Wu, Zhilu
作者单位	1.Minist Nat Resources, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China 2.Wuhan Univ, Sch Geodesy & Geomat, Wuhan 430079, Hubei, Peoples R China 3.Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yang,Liu, Yanxiong,Chen, Guanxu,et al. Evaluation of HY-2A satellite-borne water vapor radiometer with shipborne GPS and GLONASS observations over the Indian Ocean[J]. GPS SOLUTIONS,2019,23(3).
APA	Liu, Yang,Liu, Yanxiong,Chen, Guanxu,&Wu, Zhilu.(2019).Evaluation of HY-2A satellite-borne water vapor radiometer with shipborne GPS and GLONASS observations over the Indian Ocean.GPS SOLUTIONS,23(3).
MLA	Liu, Yang,et al."Evaluation of HY-2A satellite-borne water vapor radiometer with shipborne GPS and GLONASS observations over the Indian Ocean".GPS SOLUTIONS 23.3(2019).