长基线航空重力测量精度分析

doi:10.11720/wtyht.2022.0073

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Abstract

It is difficult to set up GPS base stations for airborne gravimetry in offshore and far seas, leading to long baselines. Given this, this study analyzed the impacts of long baselines on the precision of airborne gravimetry based on the principle of airborne gravimetry and the real measurement data. Moreover, this study comprehensively analyzed the effects of long baselines on differential positioning precision and evaluated the internal coincidence precision of airborne gravity anomaly. Compared to the precision required for airborne gravimetry, it is believed that long baselines (600-800 km) have limited and almost negligible impacts on the precision of airborne gravimetry. This study can provide technical support for further development of airborne gravimetry in offshore and far seas.

Key words： airborne gravimetry long baseline internal coincidence precision

Received: 23 February 2022 Published: 17 August 2022

ZTFLH:

P631

Corresponding Authors: Zhou Jian-Xin E-mail: 510231865@qq.com;zjxhkwt@163.com

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	Articles by authors
	Rui Li
	Qing Shu
	Yao Luo
	Chen-Yang Wang
	Wei Gao
	Jian-Xin Zhou

Cite this article:

Rui Li,Qing Shu,Yao Luo, et al. The precision of airborne gravimetry under the condition of long baselines[J]. Geophysical and Geochemical Exploration, 2022, 46(4): 955-960.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.0073 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I4/955

The minimum value of space vehicles of survey line

The maximum value of space vehicles of survey line

The mean value of space vehicles of survey line

The minimum value of PDOP of survey line

The maximum value of PDOP of survey line

The mean value of PDOP of survey line

Internal accordance accuracy of survey line L2780 under long and short baseline conditions

Internal accordance accuracy statistics of gravity anomaly obtained by different two base stations of the same survey line(L) and the same tie line(T)

	最大值 /mGal	最小值 /mGal	平均值 /mGal	$σ$ /mGal
方案1	8.59	-6.49	0.22	1.31
方案2	9.41	-4.90	0.60	1.29
方案3	6.17	-7.63	-0.35	1.32
方案4	6.98	-5.86	0.03	1.21

Intersection accuracy evaluation of airborne gravity anomaly

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