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2021, 40(3) 671-679 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Post mission error compensation method of
gravity gradiometry based on deep learning |
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CHENG Yi,LI Tong-lin,ZHANG Rong-zhe,ZHOU Shuai |
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College of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China |
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Abstract:
The error compensation of dynamic measurement of rotating accelerometer gravity gradiometer is the key technology of airborne gravity gradiometry. Because of the direct extraction of data features by deep learning,it is expected to compensate the error which is difficult to be compensated by modeling in the past,so as to further improve the effect of error compensation. The authors put forward a post mission error compensation method for airborne
gravity gradiometry based on deep learning. The dataset is established by using the measured data of the aerial test,and the neural network is built and trained to map the motion parameters of the gradiometer to the output noise of the gradiometer,and the network is used to predict the output noise of the gradiometer. It is used to compensate the errors of other measured data. The results show that the output noise of the gradiometer predicted by deep learning is very close to the actual output noise. After compensation,the output noise of the gradiometer decreases by more than an order of magnitude,and the error level of compensation is close to the target accuracy of the prototype of the gradiometer. |
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Keywords:
airborne gravity gradiometry
rotating accelerometer gravity gradiometer
dynamic measurement
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Received Revised Online: |
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