Review of the Research Progress on Static Earth Gravity Field and Vertical Datum in China during 2019—2023

doi:10.11947/j.JGGS.2023.0308

Abstract

Abstract:

The contribution presents the representative research progress on global static gravity field modeling, regional geoid/quasigeoid determination, vertical datum study, as well as the theory, algorithm and software for gravity field study in China from 2019 to 2023, which are the highlights of the chapter 6 “Progress in Earth Gravity Model and Vertical Datum” in the “2019—2023 China National Report on Geodesy” that submitted to the International Association of Geodesy(IAG). In addition, suggestions are proposed to promote the research in the fields of earth gravity field, geoid/quasigeoid and vertical datumin China according to trends of international geodesy and related disciplines.

Key words: Earth gravity field; geoid; International Height Reference System; quasigeoid; vertical datum

Tao JIANG, Xinyu XU, Yonghai CHU, Taoyong JIN, Wei LIANG, Yihao WU, Yanguang FU, Yongqi ZHAO, Xinwei GUO. Review of the Research Progress on Static Earth Gravity Field and Vertical Datum in China during 2019—2023[J]. Journal of Geodesy and Geoinformation Science, 2023, 6(3): 76-86.

Figures/Tables 6

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	Model	Max	Min	Mean	STD
USA	GOSG02S	1.046	-2.184	-0.562	0.441
	WHU-SWPU-GOGR2022S	1.050	-2.179	-0.561	0.440
	GO_CONS_GCF_2_DIR_R6	1.080	-2.196	-0.565	0.438
	GO_CONS_GCF_2_TIM_R6	1.038	-2.221	-0.554	0.432
	Tongji-GMMG2021S	1.068	-2.193	-0.561	0.437
	GOCO06s	1.001	-2.234	-0.557	0.435
China	GOSG02S	1.023	-1.690	0.073	0.388
	WHU-SWPU-GOGR2022S	1.024	-1.689	0.070	0.389
	GO_CONS_GCF_2_DIR_R6	0.969	-1.640	0.070	0.391
	GO_CONS_GCF_2_TIM_R6	0.963	-1.584	0.075	0.385
	Tongji-GMMG2021S	1.070	-1.665	0.072	0.389
	GOCO06s	0.953	-1.578	0.072	0.384

	Model	Max	Min	Mean	STD	RMS
USA	EGM2008	0.360	-1.396	-0.511	0.284	0.584
	SGG-UGM-1	0.317	-1.407	-0.511	0.280	0.583
	SGG-UGM-2	0.386	-1.394	-0.511	0.277	0.578
	GECO	0.313	-1.391	-0.513	0.281	0.585
	EIGEN-6C4	0.397	-1.392	-0.512	0.282	0.585
	XGM2019e_2159	0.345	-1.404	-0.507	0.277	0.578
China	EGM2008	1.729	-1.535	0.239	0.240	0.339
	SGG-UGM-1	0.744	-0.618	0.246	0.162	0.294
	SGG-UGM-2	0.744	-0.603	0.246	0.161	0.292
	GECO	1.165	-0.847	0.244	0.180	0.303
	EIGEN-6C4	0.729	-0.698	0.243	0.157	0.289
	XGM2019e_2159	0.630	-0.761	0.244	0.143	0.283