Absolute calibration of HY-2A and Jason-2 altimeters for sea surface height using GPS buoy in Qinglan, China

Chuntao CHEN; Jianhua ZHU; Wanlin ZHAI; Longhao YAN; Yili ZHAO; Xiaoqi HUANG; Weiwei YANG

doi:10.1007/s00343-019-8216-8

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Absolute calibration of HY-2A and Jason-2 altimeters for sea surface height using GPS buoy in Qinglan, China

Physics | Updated：2023-05-20

- Absolute calibration of HY-2A and Jason-2 altimeters for sea surface height using GPS buoy in Qinglan, China
- Journal of Oceanology and Limnology Vol. 37, Issue 5, Pages: 1533-1541(2019)
- Affiliations：
  
  National Ocean Technology Center, Ministry of Natural Resources(MNR), Tianjin 300112, China
- Author bio：
  
  CHEN Chuntao, kuroshiocct@163.com
- Funds：
- DOI：10.1007/s00343-019-8216-8
  CLC：
- Received：29 August 2018，
  
  Accepted：21 November 2018，
  
  Online First：01 February 2019，
  
  Published：2019-09
- Accepted：
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Chuntao CHEN, Jianhua ZHU, Wanlin ZHAI, et al. Absolute calibration of HY-2A and Jason-2 altimeters for sea surface height using GPS buoy in Qinglan, China[J]. Journal of Oceanology and Limnology, 2019, 37(5): 1533-1541.
DOI：

Chuntao CHEN, Jianhua ZHU, Wanlin ZHAI, et al. Absolute calibration of HY-2A and Jason-2 altimeters for sea surface height using GPS buoy in Qinglan, China[J]. Journal of Oceanology and Limnology, 2019, 37(5): 1533-1541. DOI： 10.1007/s00343-019-8216-8.

摘要

Abstract

GPS buoy methodology is one of the main calibration methodologies for altimeter sea surface height calibration. This study introduces the results of the Qinglan calibration campaign for the HY-2A and Jason-2 altimeters. It took place in two time slices; one was from August to September 2014

and the other was in July 2015. One GPS buoy and two GPS reference stations were used in this campaign. The GPS data were processed using the real-time kinematic (RTK) technique. The final error budget estimate when measuring the sea surface height (SSH) with a GPS buoy was better than 3.5 cm. Using the GPS buoy

the altimeter bias estimate was about -2.3 cm for the Jason-2 Geophysical Data Record (GDR) Version 'D' and from -53.5 cm to -75.6 cm for the HY-2A Interim Geophysical Data Record (IGDR). The bias estimates for Jason-2 GDR-D are similar to the estimates from dedicated calibration sites such as the Harvest Platform

the Crete Site and the Bass Strait site. The bias estimates for HY-2A IGDR agree well with the results from the Crete calibration site. The results for the HY-2A altimeter bias estimated by the GPS buoy were verified by cross-calibration

and they agreed well with the results from the global analysis method.

关键词

Keywords

references

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