Methods for Underwater Gravity Measurement Error Compensations Based on Correlation Analysis
The measurement of Earth’s gravitational field is important in geophysics, geodynamics, geodesy, oceanography, and space science. The ocean covers 71% of the earth’s surface; therefore, measuring the ocean’s gravitational field is crucial. Compared with shipborne gravimetry, underwater gravimetry ne...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/20/10511 |
| _version_ | 1797475575046078464 |
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| author | Dongyao Yu Zhiming Xiong Juliang Cao Shaokun Cai Ruihang Yu Wei Liu |
| author_facet | Dongyao Yu Zhiming Xiong Juliang Cao Shaokun Cai Ruihang Yu Wei Liu |
| author_sort | Dongyao Yu |
| collection | DOAJ |
| description | The measurement of Earth’s gravitational field is important in geophysics, geodynamics, geodesy, oceanography, and space science. The ocean covers 71% of the earth’s surface; therefore, measuring the ocean’s gravitational field is crucial. Compared with shipborne gravimetry, underwater gravimetry near the seafloor is closer to gravity sources and can obtain short-wavelength gravity information that is useful for small-scale deposit detection and seawater intrusion monitoring. This article focuses on gravimetric errors caused by the poor dynamics of the carrier; an error compensation method for underwater gravimetry based on correlation analysis is proposed. By analyzing the error sources that affect the dynamics of the carrier, the relationship between the gravimetry error and impact factors related to the dynamics was established, and the model’s parameters were estimated by the least-squares fitting method. The experimental data show that this method can effectively compensate for gravimetric errors caused by carrier dynamics and provide the theoretical basis and algorithm model for underwater gravimetry in the bottom-tracking mode. |
| first_indexed | 2024-03-09T20:46:04Z |
| format | Article |
| id | doaj.art-d2ce78f660d64c498988777ee4ecfd44 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T20:46:04Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-d2ce78f660d64c498988777ee4ecfd442023-11-23T22:45:53ZengMDPI AGApplied Sciences2076-34172022-10-0112201051110.3390/app122010511Methods for Underwater Gravity Measurement Error Compensations Based on Correlation AnalysisDongyao Yu0Zhiming Xiong1Juliang Cao2Shaokun Cai3Ruihang Yu4Wei Liu5College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaThe measurement of Earth’s gravitational field is important in geophysics, geodynamics, geodesy, oceanography, and space science. The ocean covers 71% of the earth’s surface; therefore, measuring the ocean’s gravitational field is crucial. Compared with shipborne gravimetry, underwater gravimetry near the seafloor is closer to gravity sources and can obtain short-wavelength gravity information that is useful for small-scale deposit detection and seawater intrusion monitoring. This article focuses on gravimetric errors caused by the poor dynamics of the carrier; an error compensation method for underwater gravimetry based on correlation analysis is proposed. By analyzing the error sources that affect the dynamics of the carrier, the relationship between the gravimetry error and impact factors related to the dynamics was established, and the model’s parameters were estimated by the least-squares fitting method. The experimental data show that this method can effectively compensate for gravimetric errors caused by carrier dynamics and provide the theoretical basis and algorithm model for underwater gravimetry in the bottom-tracking mode.https://www.mdpi.com/2076-3417/12/20/10511underwater gravimetrycorrelation analysiserror compensationempirical mode decompositioncarrier dynamic |
| spellingShingle | Dongyao Yu Zhiming Xiong Juliang Cao Shaokun Cai Ruihang Yu Wei Liu Methods for Underwater Gravity Measurement Error Compensations Based on Correlation Analysis Applied Sciences underwater gravimetry correlation analysis error compensation empirical mode decomposition carrier dynamic |
| title | Methods for Underwater Gravity Measurement Error Compensations Based on Correlation Analysis |
| title_full | Methods for Underwater Gravity Measurement Error Compensations Based on Correlation Analysis |
| title_fullStr | Methods for Underwater Gravity Measurement Error Compensations Based on Correlation Analysis |
| title_full_unstemmed | Methods for Underwater Gravity Measurement Error Compensations Based on Correlation Analysis |
| title_short | Methods for Underwater Gravity Measurement Error Compensations Based on Correlation Analysis |
| title_sort | methods for underwater gravity measurement error compensations based on correlation analysis |
| topic | underwater gravimetry correlation analysis error compensation empirical mode decomposition carrier dynamic |
| url | https://www.mdpi.com/2076-3417/12/20/10511 |
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