Global marine gravity anomalies recovered from multi-beam laser altimeter data of ICESat-2

被引：0
|
作者：
Li Z. [1 ]
Guo J. [1 ]
Sun Z. [2 ]
Jia Y. [3 ]
Huang L. [2 ]
Sun H. [4 ]
机构：
[1] College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao
[2] State Key Laboratory of Geo-In formation Engineering, Xi'an
[3] National Satellite Ocean Application Service, Beijing
[4] Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan
来源：
Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | 2024年 / 53卷 / 02期
基金：
中国国家自然科学基金;
关键词：
deflection of the vertical; ICESat-2; marine gravity anomaly; satellite laser altimetry; sea surface height;
D O I：
10.11947/j.AGCS.2024.20230207
中图分类号：
学科分类号：
摘要：
Satellite altimetry is one of the crucial techniques for the recovery of marine gravity anomalies. The along-track altimeter data is commonly used, while the cross-track data from conventional altimetry missions is not used to recover marine gravity anomalies due to the long time intervals or sparse ground-track spacing, which limits the improvement of the gravity anomaly model. The ICESat-2 laser altimetry mission operates with three pairs of laser beams, each pair separated by 3 km, which provides the possibility of using the cross-track altimeter data. The cross-track data processing method is presented and global marine gravity anomaly models (named IS2Gra_alo and IS2Gra_alo_acr) are recovered from the along-track altimeter data and the combination of along-track and cross-track altimeter data, respectively. The root mean square (RMS) of the difference between IS2Gra_alo_acr and global shipborne gravity is 5.54 mGal, which is 0.16 mGal better than that of IS2Gra_alo. According to the difference between ICESat-2 gravity models and released global gravity anomaly models, the RMS derived by IS2Gra alo acr is at least 0.10 mGal better than that of IS2Gra alo. The above results confirm that the accuracy of the gravity model recovered from along-track data is improved by incorporating cross-track data, and the ICESat-2 altimeter data is reliable for the recovery of global marine gravity anomalies. Additionally, the combination of different cross-track and along-track altimeter data is discussed for the accuracy of the gravity model recovered from ICESat-2. The accuracy of the gravity model is able to be improved by incorporating the appropriate cross-track altimeter data with the along-track altimeter data. This research provides a reference for the recovery of marine gravity anomalies from the future altimeter data of the SWOT altimetry mission and the two-satellite tandem mode altimetry of China. © 2024 SinoMaps Press. All rights reserved.
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页码：252 / 262
页数：10
相关论文
共 38 条
  • [1] ZINGERLE P, PAIL R, GRUBER T, Et al., The combined global gravity field model XGM2019e, Journal of Geodesy, 94, 7, (2020)
  • [2] XU Chuang, LI Jinbo, JIAN Guangyu, Et al., An adaptive nonlinear iterative method for predicting seafloor topography from altimetry-derived gravity data, Journal of Geophysical Research: Solid Earth, 128, 1, (2023)
  • [3] HWANG C, CHANG E T Y., Seafloor secretsr evealed, Science, 346, pp. 32-33, (2014)
  • [4] LI Xiaoping, ZHOU Xiangao, GONG Jing, Factor influencing mechanism modeling and test validation of gravity map matching navigation, Journal of Chinese Inertial Technology, 29, 6, pp. 777-781, (2021)
  • [5] LI Yang, GUO Jinyun, SUN Yu, Et al., Inversion of global sea level change and its component contributions by combining time-varying gravity data and altimetry data, Acta Geodaetica et Cartographica Sinica, 51, 8, pp. 1768-1778, (2022)
  • [6] GREEN C M, FLETCHER K M U, CHEYNEY S, Et al., Satellite gravity-enhancements from new satellites and new altimeter technology, Geophysical Prospecting, 67, 6, pp. 1611-1619, (2019)
  • [7] SANDWELL D T, MULLER R D, SMITH W H F, Et al., New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure, Science, 346, 6205, pp. 65-67, (2014)
  • [8] SCHWABE J, SCHEINERT M., Regional geoid of the Weddell Sea, Antarctica, from heterogeneous ground-based gravity data, Journal of Geodesy, 88, 9, pp. 821-838, (2014)
  • [9] ZHANG Shengjun, ABULAITIJIANG A, ANDERSEN O B, Et al., Comparison and evaluation of high-resolution marine gravity recovery via sea surface heights or sea surface slopes, Journal of Geodesy, 95, 6, (2021)
  • [10] JIN Taoyong, ZHOU Mao, ZHANG Huan, Et al., Analysis of vertical deflections determined from one cycle of simulated SWOT wide-swath altimeter data, Journal of Geodesy, 96, 4, (2022)
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