A method to improve the accuracy of low orbit satellite predietion

摘要

In this method, the orbit elements a, i, OMEGA , zeta chemical c sin omega , eta chemical bounds c cos omega and lambda M+ omega derived from IRV data are taken as basic variables in numcrical integration. By these elements the polynomial's degree of the interpolation can be decreased. The cheange of x-coordinate axis to Mean Equinox decreases the innfluence of the error of the proedicted TI-UTC. The usage of up date SLR data ean improve the orbit elements of satellites. The order and degrce of the Earth's spherical harmonic perturbation are extended to 20 x 20. The solar and lunar coordinates are improved to about 2', that can further improve the solar and hunar perturbations. The light proessure perturbation, the air drag perturbation, and the influcnecs from the coordinate system and the polar motion transformation are also taken into account. The improved satellite prediction proeedure would be available to the laser satellite observation at the daylight.