Preliminary marine gravity field from HY-2A/GM altimeter data

Qiankun Liu; Ke Xu; Maofei Jiang; Jiaming Wang

doi:10.1007/s13131-020-1610-4

Volume 39 Issue 7

Jul. 2020

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Qiankun Liu, Ke Xu, Maofei Jiang, Jiaming Wang. Preliminary marine gravity field from HY-2A/GM altimeter data[J]. Acta Oceanologica Sinica, 2020, 39(7): 127-134. doi: 10.1007/s13131-020-1610-4

Citation:

Qiankun Liu, Ke Xu, Maofei Jiang, Jiaming Wang. Preliminary marine gravity field from HY-2A/GM altimeter data[J]. Acta Oceanologica Sinica, 2020, 39(7): 127-134. doi: 10.1007/s13131-020-1610-4

Qiankun Liu, Ke Xu, Maofei Jiang, Jiaming Wang. Preliminary marine gravity field from HY-2A/GM altimeter data[J]. Acta Oceanologica Sinica, 2020, 39(7): 127-134. doi: 10.1007/s13131-020-1610-4

Citation:

Qiankun Liu, Ke Xu, Maofei Jiang, Jiaming Wang. Preliminary marine gravity field from HY-2A/GM altimeter data[J]. Acta Oceanologica Sinica, 2020, 39(7): 127-134. doi: 10.1007/s13131-020-1610-4

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Preliminary marine gravity field from HY-2A/GM altimeter data

doi: 10.1007/s13131-020-1610-4

Qiankun Liu^{1, 2},
Ke Xu^{1
,
,},
Maofei Jiang¹,
Jiaming Wang^{1, 2}

1.
The CAS Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences (CAS), Beijing 100190, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: The National Natural Science Foundation of China under contract No. 41906199; the Youth Innovation Project of National Space Science Center of Chinese Academy of Sciences under contract No. E0PD40012S.

More Information

Corresponding author: E-mail: xuke@mirslab.cn
Received Date: 2019-10-22
Accepted Date: 2020-01-13

Available Online: 2020-12-28

Publish Date: 2020-07-25

Abstract

Abstract

HY-2A (Haiyang-2A), launched in 2011, is the first ocean dynamic environment satellite of China and is equipped with a radar altimeter as one of the primary payloads. HY-2A shifted the drift orbit in March 2016 and has been accumulating geodetic mission (GM) data for more than three years with 168-day cycle. In this paper, we present the preliminary gravity field inverted by the HY-2A/GM data from March 2016 to December 2017 near Taiwan (21°–26°N, 119°–123°E). The gravity anomaly is computed by Inverse Vening Meinesz (IVM) formula with a one-dimensional FFT method during remove-restore procedure with the EGM2008 gravity model as the reference field. For comparison, CryoSat-2 altimeter data are used to inverse the gravity field near Taiwan Island by the same method. Comparing with the gravity field derived from CryoSat-2, a good agreement between the two data sets is found. The global ocean gravity models and National Geophysical Data Center (NGDC) shipboard gravity data also are used to assess the performance of HY-2A/GM data. The evaluations show that HY-2A and CryoSat-2 are at the same level in terms of gravity field recovery and the HY-2A/GM altimeter-derived gravity field has an accuracy of 2.922 mGal. Therefore, we can believe that HY-2A will be a new reliable data source for marine gravity field inversion and has the potentiality to improve the accuracy and resolution of the global marine gravity field.
- HY-2A,
- radar altimeter,
- geodetic mission,
- marine gravity anomaly,
- inversion

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References(34)

References

[1]	Andersen O B, Knudsen P. 1998. Global marine gravity field from the ERS-1 and Geosat geodetic mission altimetry. Journal of Geophysical Research, 103(C4): 8129–8137. doi: 10.1029/97JC02198
[2]	Andersen O B, Knudsen P, Berry P A M. 2010. The DNSC08GRA global marine gravity field from double retracked satellite altimetry. Journal of Geodesy, 84(3): 191–199. doi: 10.1007/s00190-009-0355-9
[3]	Andersen O B, Knudsen P, Kenyon S, et al. 2014. Global and arctic marine gravity field from recent satellite altimetry (DTU13). In: Proceedings of the 76th EAGE Conference and Exhibition. Amsterdam: European Association of Geoscientists & Engineers
[4]	Andersen O B, Jain M, Knudsen P. 2015. The impact of using jason-1 and cryosat-2 geodetic mission altimetry for gravity field modeling. In: Rizos C, Willis P, eds. IAG 150 Years. Cham: Springer, 205–210, doi: 10.1007/1345_2015_95
[5]	Bao Lifeng, Gao Peng, Peng Hailong, et al. 2015. First accuracy assessment of the HY-2A altimeter sea surface height observations: cross-calibration results. Advances in Space Research, 55(1): 90–105. doi: 10.1016/j.asr.2014.09.034
[6]	Garcia E S, Sandwell D T, Smith W H F. 2014. Retracking CryoSat-2, Envisat and Jason-1 radar altimetry waveforms for improved gravity field recovery. Geophysical Journal International, 196(3): 1402–1422. doi: 10.1093/gji/ggt469
[7]	Guan Yihe, Sheng Hui, Liu Shanwei, et al. 2016. Inversion of the gravity anomalies by using multi-generation satellite altimeter data in the South China Sea. Hydrographic Surveying and Charting (in Chinese), 36(1): 11–14
[8]	Guo Jinyun, Gao Yonggang, Hwang C, et al. 2010. A multi-subwaveform parametric retracker of the radar satellite altimetric waveform and recovery of gravity anomalies over coastal oceans. Science China Earth Sciences, 53(4): 610–616. doi: 10.1007/s11430-009-0171-3
[9]	Haxby W F, Karner G D, Labrecque J L, et al. 1983. Digital images of combined oceanic and continental data sets and their use in tectonic studies. EOS, Transactions American Geophysical Union, 64(52): 995–1004. doi: 10.1029/EO064i052p00995
[10]	Hsiao Y S, Hwang C, Cheng Y S, et al. 2016. High-resolution depth and coastline over major atolls of South China Sea from satellite altimetry and imagery. Remote Sensing of Environment, 176: 69–83. doi: 10.1016/j.rse.2016.01.016
[11]	Hwang C. 1998. Inverse Vening Meinesz formula and deflection-geoid formula: applications to the predictions of gravity and geoid over the South China Sea. Journal of Geodesy, 72(5): 304–312. doi: 10.1007/s001900050169
[12]	Hwang C, Guo J Y, Deng X L, et al. 2006. Coastal gravity anomalies from retracked Geosat/GM altimetry: improvement, limitation and the role of airborne gravity data. Journal of Geodesy, 80(4): 204–216. doi: 10.1007/s00190-006-0052-x
[13]	Hwang C, Hsu H Y, Jang R J. 2002. Global mean sea surface and marine gravity anomaly from multi-satellite altimetry: applications of deflection-geoid and inverse Vening Meinesz formulae. Journal of Geodesy, 76(8): 407–418. doi: 10.1007/s00190-002-0265-6
[14]	Hwang C, Kao E C, Parsons B. 1998. Global derivation of marine gravity anomalies from Seasat, Geosat, ERS-1 and TOPEX/POSEIDON altimeter data. Geophysical Journal International, 134(2): 449–459. doi: 10.1111/j.1365-246X.1998.tb07139.x
[15]	Jiang Maofei, Xu Ke, Liu Yalong. 2018a. Global Statistical Assessment and Cross-Calibration with Jason-2 for Reprocessed HY-2A Altimeter Data. Marine Geodesy, 41(3): 289–312. doi: 10.1080/01490419.2017.1375053
[16]	Jiang Maofei, Xu Ke, Liu Yalong, et al. 2018b. Assessment of reprocessed sea surface height measurements derived from HY-2A radar altimeter and its application to the observation of 2015-2016 El Niño. Acta Oceanologica Sinica, 37(1): 115–129. doi: 10.1007/s13131-018-1162-z
[17]	McAdoo D C, Marks K M. 1992. Gravity fields of the southern ocean from Geosat data. Journal of Geophysical Research: Solid Earth, 97(B3): 3247–3260. doi: 10.1029/91JB02797
[18]	Pavlis N K, Holmes S A, Kenyon S C, et al. 2012. The development and evaluation of the earth gravitational model 2008 (EGM2008). Journal of Geophysical Research: Solid Earth, 117(B4): B04406
[19]	Peng Hailong, Lin Mingsen, Mu Bo, et al. 2015. Global statistical evaluation and performance analysis of HY-2A satellite radar altimeter data. Haiyang Xuebao (in Chinese), 37(7): 54–66
[20]	Rapp R H. 1979. Geos 3 data processing for the recovery of geoid undulations and gravity anomalies. Journal of Geophysical Research: Solid Earth, 84(B8): 3784–3792. doi: 10.1029/JB084iB08p03784
[21]	Rapp R H. 1986. Gravity anomalies and sea surface heights derived from a combined GEOS 3/Seasat altimeter data set. Journal of Geophysical Research: Solid Earth, 91(B5): 4867–4876. doi: 10.1029/JB091iB05p04867
[22]	Sandwell D T. 1992. Antarctic marine gravity field from high-density satellite altimetry. Geophysical Journal International, 109(2): 437–448. doi: 10.1111/j.1365-246X.1992.tb00106.x
[23]	Sandwell D, Garcia E, Soofi K, et al. 2013. Toward 1-mGal accuracy in global marine gravity from Cryosat-2, Envisat, and Jason-1. The Leading Edge, 32(8): 892–899. doi: 10.1190/tle32080892.1
[24]	Sandwell D T, McAdoo D C. 1988. Marine gravity of the southern ocean and Antarctic margin from Geosat. Journal of Geophysical Research: Solid Earth, 93(B9): 10389–10396. doi: 10.1029/JB093iB09p10389
[25]	Sandwell D T, Müller R D, Smith W H F, et al. 2014. New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure. Science, 346(6205): 65–67. doi: 10.1126/science.1258213
[26]	Sandwell D T, Smith W H F. 1997. Marine gravity anomaly from Geosat and ERS 1 satellite altimetry. Journal of Geophysical Research: Solid Earth, 102(B5): 10039–10054. doi: 10.1029/96JB03223
[27]	Sandwell D T, Smith W H F. 2009. Global marine gravity from retracked Geosat and ERS-1 altimetry: ridge segmentation versus spreading rate. Journal of Geophysical Research: Solid Earth, 114(B1): B01411
[28]	Wan Jianhua, Li Ruizhou, Liu Shanwei, et al. 2017. Effection analysis for gravity precision from HY-2A altimeter data. Hydrographic Surveying and Charting (in Chinese), 37(4): 24–27
[29]	Wang Lei, Xu Ke, Liu Peng, et al. 2013a. An echo model for big antenna mispointing angle and its application in HY-2A satellite radar altimeter. Acta Electronica Sinica (in Chinese), 41(9): 1836–1841
[30]	Wang Lei, Xu Ke, Xu Xiyu, et al. 2013b. A new method for computing radar altimeter look-up correction table and its application. Journal of Electronics & Information Technology (in Chinese), 35(4): 908–914
[31]	Yang Yuande, Hwang C, Hsu H J, et al. 2012. A subwaveform threshold retracker for ERS-1 altimetry: a case study in the Antarctic Ocean. Computers & Geosciences, 41: 88–98
[32]	Yang Lei, Zhou Xinghua, Lin Mingsen, et al. 2016. Global statistical assessment of HY-2A altimeter IGDR data. Progress in Geophysics (in Chinese), 31(2): 629–636
[33]	Zhang Shengjun, Li Jiancheng, Jin Taoyong, et al. 2018. HY-2A altimeter data initial assessment and corresponding two-pass waveform Retracker. Remote Sensing, 10(4): 507. doi: 10.3390/rs10040507
[34]	Zhang Shengjun, Sandwell D T, Jin Taoyong, et al. 2017. Inversion of marine gravity anomalies over southeastern China seas from multi-satellite altimeter vertical deflections. Journal of Applied Geophysics, 137: 128–137. doi: 10.1016/j.jappgeo.2016.12.014