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Title:
METHOD FOR DETERMINING GRAVITY-RELATED RECIPROCAL OF TIME
Document Type and Number:
WIPO Patent Application WO/2021/120533
Kind Code:
A1
Abstract:
A method for determining a gravity-related reciprocal of time. During processing of gravity measurement data, a gravity anomaly is considered a stationary random process in the time domain, and is described by using a Gauss-Markov model of a second order, a third order or an mth order. A gravity-related reciprocal of time is an important parameter of a gravity anomaly model. A gravity-related reciprocal of time of the Gauss-Markov model of a second order, a third order or an mth order is determined according to a root mean square of an error of a gravity sensor, a root mean square of a height error of a global navigation satellite system, a priori gravity root mean square and a gravity filter cutoff frequency in a gravity measurement process performed by a moving base. The method for determining a gravity-related reciprocal of time enables an adjustment of positive and negative Kalman filters used to process gravity measurement data obtained by a moving base, thereby obtaining a highly precise gravity anomaly value having a high wavelength resolution.

Inventors:
CAI TIJING (CN)
Application Number:
PCT/CN2020/094336
Publication Date:
June 24, 2021
Filing Date:
June 04, 2020
Export Citation:
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Assignee:
UNIV SOUTHEAST (CN)
International Classes:
G01V7/06
Foreign References:
CN109212629A2019-01-15
US20170108612A12017-04-20
CN102043169A2011-05-04
CN109141436A2019-01-04
Other References:
CAI, TIJING ET AL.: "Kalman Filtering of Strapdown Airborne Gravity Measurement", PIEZOELECTRICS & ACOUSTOOPTICS, vol. 41, no. 3, 30 June 2019 (2019-06-30), pages 436 - 439, XP055822895
CAI, TIJING ET AL.: "A Two-step Gravity Matching Algorithm Based on Correlation Extremum", PIEZOELECTRICS & ACOUSTOOPTICS, vol. 41, no. 5, 31 October 2019 (2019-10-31), pages 747 - 751, XP055822899
Attorney, Agent or Firm:
NANJING ZHONGLIAN PATENT AGENCY CO., LTD. (CN)
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