The Formation of the Local Gravitational Model Based on Point-Mass Method

Virtual point-mass method has been widely used to approximating the local gravity field. However, the approximation area is usually too small. Thus point-mass model for large area is studied in this paper. And an experiment is conducted for the earth's gravity model in the region of Tibetan pla...

Full description

Saved in:
Bibliographic Details
Published in:Sensors & transducers 2013-04, Vol.20 (4), p.64-64
Main Authors: Jian-Qiang, Wang, Guo-Qiang, Zhao, Zhi-Qi, Yu
Format: Article
Language:English
Subjects:
Accuracy
Approximation
Boundary value problems
Construction
Disturbances
Eigenvalues
Formations
Geodetics
Gravitation
Gravitational fields
Gravity
Mathematical analysis
Mathematical models
Satellites
Truncation errors
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Virtual point-mass method has been widely used to approximating the local gravity field. However, the approximation area is usually too small. Thus point-mass model for large area is studied in this paper. And an experiment is conducted for the earth's gravity model in the region of Tibetan plateau, while the region is 74° -104° E and 25° - 40° N. The formatted point-mass model is a three-tier point-mass model which is on the base of the geopotential model with low degree and order. In addition, the resolution of the model is 2'×2'. The observations of gravity anomaly are simulated from EGM2008 with degree and order 2159. The focus is on the formation of the point masses in the space domain and the solution of the formatted equation for virtual point masses. The results of the experiments show that the truncation error of gravity disturbance created by using the point-mass model is less than 1mGal and the geoid formatted by point-mass is applicable to engineering. Furthermore, this method is easy to deal with higher resolution model. [PUBLICATION ABSTRACT]
ISSN:2306-8515
1726-5479
1726-5479