Far-zone contributions of airborne gravity anomalies' upward/downward continuation

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• 作者：Boyang Zhou^a ; ^{wdzbyang@163.com}Author Vitae ; Zhicai Luo^b ; Yihao Wu^b ; Yuqiao Cen^c
• 关键词：Airborne gravimetry ; Poisson integral ; Upward/downward continuation ; Far-zone contributions ; Remove-Compute-Restore technique
• 刊名：Geodesy and Geodynamics
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：7
• 期：6
• 页码：444-450
• 全文大小：2160 K
• 卷排序：7

文摘

Airborne gravimetry has become a vital technique in local gravity field approximation, and upward/downward continuation of gravity data is a key process of airborne gravimetry. In these procedures, the integral domain is divided into two parts, namely the near-zone and the far-zone. The far-zone contributions are approximated by the truncation coefficients and a global geo-potential model, and their values are controlled by several issues. This paper investigates the effects of flight height, the size of near-zone cap, and Remove-Compute-Restore (RCR) technique upon far-zone contributions. Results show that at mountainous area the far-zone contributions can be ignored when EIGEN-6C of 360 degree is removed from the gravity data, together with a near-zone cap of 1° and a flight height less than 10 km, while at flat area EIGEN-6C of 180 degree is feasible.