Quality assessment of HY-2A altimeter data through tide gauge comparisons

Hou Kaixin; Zhang Shengjun; Kong Xiangxue

doi:10.3969/j.issn.0253-4193.2019.07.012

Volume 41 Issue 7

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Hou Kaixin，Zhang Shengjun，Kong Xiangxue. Quality assessment of HY-2A altimeter data through tide gauge comparisons[J]. Haiyang Xuebao，2019, 41(7)：136–142，doi:10.3969/j.issn.0253−4193.2019.07.012

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Quality assessment of HY-2A altimeter data through tide gauge comparisons

doi: 10.3969/j.issn.0253-4193.2019.07.012

1.
College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
2.
Liaoning Earthquake Agency, Shenyang 110031, China

Received Date: 2018-08-02
Rev Recd Date: 2018-12-10

Available Online: 2021-04-21

Publish Date: 2019-07-25

Abstract

Abstract

The tide gauge data provide an effective way to evaluate the accuracy of satellite altimeter data. The HY-2A data are filtered based on the data edited criterion and the model of real-time atmospheric pressure provided by NCEP are used to solve the problem caused by the unavailable dry tropospheric correction and inverse barometer correction in the later stage of the HY-2A exact repeat mission (ERM). By matching the HY-2A altimeter data and the tide gauges data in temporal and spatial, the correlation coefficient and standard deviation between the two kinds of altimeter data are calculated in the nine selected tide gauges area. According to the analysis results, the average correlation coefficient is about 0.676 9, the optimum is up to 0.898 7, and the average standard deviation is 0.089 5 m. The results show that the quality of HY-2A satellite altimetry data meet the design target and achieve the expected level. It provides a new reliable data source for the application research of the marine gravity field inversion.
- HY-2A,
- satellite altimetry,
- tide gauges,
- quality assessment

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References(13)

References

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