Method for building global gravitational field model by utilizing inter-satellite distance interpolation

Abstract

The invention discloses a method for building a global gravitational field model by utilizing an inter-satellite distance interpolation. The method disclosed by the invention is as follows: an inter-satellite distance interpolation satellite observation equation is built through introducing the precise inter-satellite distance of a satellite-borne K waveband gauge into a star attachment component of a double-star opposite rail position vector so as to build a global gravitational field model with high precision and high spatial resolution. The method has high satellite gravity inversion precision, explicit observation equation physical meaning and low computer performance requirement, is easy to sense medium and high frequency gravity field signals, and is favorable for the error analysis of the gravity satellite system.

Description

1. Technical Field [0001] The invention relates to the cross-technology fields of satellite geodesy, geophysics, space science, etc., and particularly relates to a method of constructing a connection component by introducing the precise inter-satellite distance of a satellite-borne K-band measuring instrument into the star connection component of the relative orbit position vector of the binary star A new type of inter-satellite distance interpolation satellite observation equation, and then quickly establish the technical field of high-precision and high-resolution global gravity field model. 2. Background technology [0002] Such as figure 1 As shown, the gravity satellite makes a near-circular polar orbit movement around the earth under the action of the earth's gravity field. If precise orbit determination must know the accurate earth's gravity field parameters; conversely, it is possible to accurately determine the satellite orbit perturbation and use the perturbation trackin...

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Problems solved by technology

The advantage of the orbital dynamics method is that the solution accuracy is higher; the disadvantage is that the observation data has a large amount of calculation, the solution process is more complicated, and high-performance parallel computer support is required to invert the higher-order gravity field; the advantage of the energy conservation method is that The physical meaning of the observation equation is clear and easy to analyze the sensitivity of the earth's gravity field. The calculation amount is greatly reduced under the premise of ensuring the accuracy of the solution. Usually, a PC computer can be used to complete the fast solution of the high-order earth's gravity field; the disadvantage is the measurement accuracy of the satellite velocity more demanding

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