First flight test and accuracy evaluation of domestic dynamic gravimeter through the principle of zero length spring

doi:10.13474/j.cnki.11-2246.2021.0046

Bulletin of Surveying and Mapping ›› 2021, Vol. 0 ›› Issue (2): 68-71.doi: 10.13474/j.cnki.11-2246.2021.0046

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First flight test and accuracy evaluation of domestic dynamic gravimeter through the principle of zero length spring

ZHAI Zhenhe^1,2, FAN Haopeng³, GUAN Bin^1,2, MA Jian^1,2, DUAN Weichao^1,2

1. Xi'an Institute of Surveying and Mapping, Xi'an 710054, China;
2. State Key Laboratory of Geo-information Engineering, Xi'an 710054, China;
3. Information Engineering University, Zhengzhou 450052, China

Received:2020-04-06 Revised:2020-06-25 Online:2021-02-25 Published:2021-03-09

Abstract

Abstract: CHZ-Ⅱ gravimeter is the first completely domestic airborne gravimeter through the principle of zero length spring. In April 2018, the first flight test was carried out in Weinan area of Shaanxi Province, a total of 4 sorties and 24 flight surveying lines have been completed, which markes that China's airborne gravimeter has made great progress on the road of independent research and development. Using the ground gravity data of the flying area, the accuracy of CHZ-Ⅱ gravimeter's line disturbing gravity and grid disturbing gravity data is evaluated. Under the condition of 10 km resolution, the accuracy of the surveying line disturbing gravity data is up to or better than 1 mGal by using the point-mass method. The downward continuation of 5' air grid gravity data is made by using the terrain assist method, the accuracy of the 5' grid gravity data after the downward continuation is better than 5 mGal in comparison with land gravity data, which basically meets the measurement requirement of the plain area.

Key words: CHZ-Ⅱ dynamic gravimeter, zero length spring, disturbing gravity, downward continuation, degree variance model

CLC Number:

P223

ZHAI Zhenhe, FAN Haopeng, GUAN Bin, MA Jian, DUAN Weichao. First flight test and accuracy evaluation of domestic dynamic gravimeter through the principle of zero length spring[J]. Bulletin of Surveying and Mapping, 2021, 0(2): 68-71.

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First flight test and accuracy evaluation of domestic dynamic gravimeter through the principle of zero length spring

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