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| The latest progress in air gravity measurement and data processing technology abroad |
| Hong ZHANG1, Neng ZHOU2, Xiao-Dan DENG3, Meng WANG3, Xing-Su LI3 |
1. Beijing Information Technology School of Information Management, Beijing 100192, China
2. Beijing Super-sonic Technology Co., Ltd., Beijing 100192, China
3. Key Laboratory of Airborne Geophysics and Remote Sensing Geology Ministry of Natural Resources, Beijing 100083, China |
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Abstract As a new geophysical exploration technology, airborne gravity has developed rapidly. It is of great significance and practical value to master the latest foreign technology for carrying out this survey and research in China and catching up with the advanced world level. In this paper, for the first time, the latest airborne gravity survey and data processing technologies abroad were comprehensively studied and summarized. The most advanced systems integration, survey methods and data processing technologies abroad were systematically introduced. The analysis and comparison were carried out, and the future development trend was prospected. Therefore, readers can fully understand the most advanced airborne gravity technology abroad, and directly and deeply use these technologies in survey and research, so as to promote and push forward the development of airborne gravity technology in China.
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Received: 19 February 2019
Published: 25 October 2019
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DA-42 aircraft installed with AIRGrav gravimeter
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BN-2T aircraft installed with airborne gravity,magnetic,radiation
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GT-2A gelicopter airborne gravity survey system
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Airborne bouguer gravity anomaly of helicopter in Podolsky area
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| 参 数 | SGL公司(AIRGrav) | CMG公司(GT-1/2A) | 测量精度
(测线与控制线交叉
点残差的均方差) | 所有测线 | ≤0.7×10-5 m/s2(RMS)
(0阶水平调整后) | ≤0.8×10-5 m/s2(RMS)
(1阶水平调整后) | | 单架次 | ≤1.25×10-5 m/s2(RMS)
(0阶水平调整后) | ≤1.5×10-5 m/s2(RMS)
(1阶水平调整后) | | 内符合精度 | 所有重复线计算 | ≤ 0.6×10-5 m/s2(RMS) | ≤ 0.6×10-5 m/s2(RMS) | | 零 漂 | 整架次 | ≤ 2.0×10-5 m/s2 | ≤ 2.0×10-5 m/s2 | | 定位误差 | X、Y、Z精度(差分后) | ≤±5 m | ≤±10 cm | | 测线偏航距 | 测线偏航超过100 m | 连续长度<4 km | 连续长度<5 km | | 飞行高度 | 与设计高度 | 与设计高度偏差>15 m的连续
长度<7 km | (设计高度±10 m)之内占80%
以上(平飞) | | 离地垂直高度 | 采用沿起伏飞行,飞行高度
一般为200 m(真高) | 300 m~600 m(平飞),离最高障碍
物不小于200 m。 | | 测量比例尺 | 基础地质及油气调查等 | 1:5万~1:20万 | 1:5万~1:20万 | | 矿产资源等 | 1:5 000~1:2.5万 | 1:1万~1:5万 | | 控制线 | 控制线垂直于测线,其线距一般为
测线线距的10倍 | 控制线垂直于测线,其线距一般为
测线线距的10倍。 | | GPS卫星数 | 共用星数≥4颗 | 星数≥6颗 | | 飞行速度 | 固定翼:160~220 km/h
直升机:50~160 km/h | 固定翼:160~220 km/h
直升机:50~160 km/h |
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Summary of technical parameters of airborne gravity survey abroad
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Flow chart of Airborne gravity Bouguer correction
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