Estimation of Spacing of Survey Line Layout with EGM2008 Model in Marine Gravity Survey

JIN Shaohua; LI Jiabiao; WU Ziyin; BIAN Gang; CUI Yang

doi:10.13203/j.whugis20160394

Volume 43 Issue 9

Sep. 2018

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Geomatics and Information Science of Wuhan University > 2018 > 43(9): 1315-1319. > DOI: 10.13203/j.whugis20160394

JIN Shaohua, LI Jiabiao, WU Ziyin, BIAN Gang, CUI Yang. Estimation of Spacing of Survey Line Layout with EGM2008 Model in Marine Gravity Survey[J]. Geomatics and Information Science of Wuhan University, 2018, 43(9): 1315-1319. DOI: 10.13203/j.whugis20160394

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Estimation of Spacing of Survey Line Layout with EGM2008 Model in Marine Gravity Survey

JIN Shaohua^{1, 2,},
LI Jiabiao¹,
WU Ziyin^1, ,,
BIAN Gang²,
CUI Yang²

1.
Key Laboratory of Submarine Geosciences of SOA, Hangzhou 310012, China
2.
Department of Military Oceanography and Hydrography & Cartography, Dalian Naval Academy, Dalian 116018, China

Funds:

The National Natural Science Foundation of China 41576105

The National Natural Science Foundation of China 41374018

The National Natural Science Foundation of China 41476087

More Information

Author Bio:
JIN Shaohua, PhD, associate professor, specializes in marine geodesy and data processing of hydrographic surveying and charting. E-mail:jsh_1978@163.com
Corresponding author:
WU Ziyin, PhD, professor. E-mail:ziyinwu@163.com
Received Date: November 07, 2017
Published Date: September 04, 2018

Graphical Abstract

Abstract

Abstract

The survey line layout is the primary content of the technique design in marine gravity survey, which has decisive effect on assurance of the survey precision and efficiency. Survey line layout involves two aspects:One is the choice of line direction; the other is the determination of line spacing. The line direction should be as perpendicular as possible to the direction of the gravity anomaly contour; the line spacing should be widened as much as possible to meet the requirements of the accuracy of the results, in order to reduce the workload and improve the measurement efficiency. Given no sufficient consideration to the characteristics of the gravity anomaly, the line spacing is decided by survey assignment at present. The precision of EGM2008 model gravity anomaly is high in marine area; it can be used as priori information for the layout of marine gravity measurement lines. Based on the characteristics of marine gravity measurement, the EGM2008 model is used to estimate the spacing of marine gravimetric survey lines under the premise of meeting the accuracy requirements. The measured data is further used to verify the reasonableness of the survey line spacing layout. The results show that applying EGM2008 model to estimating the line layout spacing can meet accuracy requirements in marine gravity survey, which can provide the quantitative index for the optimizing of the survey line layout.
- marine gravity survey,
- survey line direction,
- survey line spacing,
- EGM2008,
- gravity anomaly map

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