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A Fast Method for Calculation of Marine Gravity Anomaly

Authors :
Hanhan Tang
Xiaohong Meng
Jun Wang
Yongkang Gan
Shuiyuan He
Yuan Fang
Source :
Applied Sciences, Volume 11, Issue 3, Applied Sciences, Vol 11, Iss 1265, p 1265 (2021)
Publication Year :
2021
Publisher :
MDPI AG, 2021.

Abstract

Gravity data have been playing an important role in marine exploration and research. However, obtaining gravity data over an extensive marine area is expensive and inefficient. In reality, marine gravity anomalies are usually calculated from satellite altimetry data. Over the years, numerous methods have been presented for achieving this purpose, most of which are time-consuming due to the integral calculation over a global region and the singularity problem. This paper proposes a fast method for the calculation of marine gravity anomalies. The proposed method introduces a novel scheme to solve the singularity problem and implements the parallel technique based on a graphics processing unit (GPU) for fast calculation. The details for the implementation of the proposed method are described, and it is tested using the geoid height undulation from the Earth Gravitational Model 2008 (EGM2008). The accuracy of the presented method is evaluated by comparing it with marine shipboard gravity data. Its efficiency is demonstrated through comparison with the conventional sequential method. The tests demonstrate that the proposed method can be employed for accurately calculating marine gravity anomalies and provides an advantage on computational efficiency.

Details

ISSN :
20763417
Volume :
11
Database :
OpenAIRE
Journal :
Applied Sciences
Accession number :
edsair.doi.dedup.....cef20e621bef1f15449d1562eaf5f69b
Full Text :
https://doi.org/10.3390/app11031265