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 componentof 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 analysisof the gravity satellite system.

Description

1. Technical field [0001] The present invention relates to intersecting technical fields such as satellite geodesy, geophysics, and space science, and in particular relates to a method of constructing The new intersatellite distance interpolation satellite observation equation, and then the technical field of quickly establishing a high-precision and high-spatial-resolution global gravity field model. 2. Background technology [0002] like figure 1 As shown, the gravity satellite moves around the earth in a near-circular polar orbit under the action of the earth's gravity field. If the orbit is determined accurately, the accurate parameters of the earth's gravity field must be known; Improve the accuracy of the Earth's gravity field parameters, and the two complement each other. In the field of geodesy, the earth's gravity field plays an important role in studying the shape of the earth and accurately determining the three-dimensional coordinates of ground control points; ...

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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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