In this paper,the achievements of the worldwide observing sites system and the analytical orbit prediction models in the past 50 years are summarized,which are the key components of satellite tracking and cataloging in the U.

The orbit prediction of the SAR satellite is the precondition of anti-satellite.

Orbit prediction of spacecrafts is considered as a forerunner of mission analysis, technology coordinating, scheme constitution and target tracking of ground telemetering, tracking and control (TT&C) system of aerospace engineering.

Based on founding a stable orbit prediction system, researching on the techniques for countering the reconnaissance satellite, especially the SAR(Synthetic Aperture Radar) satellite, is of great meaning to the counterreconnaissance of some important areas.

Error analysis of prediction orbit determined by GLONASS ephemeris;

Application of stochastic trajectory model in tail-nozzle SRM flow field numerical simulation;

It is suggested that the part ide- motion- resolution trajectory model is efficient for simulating the dynamic behavior of circulating fluidized beds.

In order to provide analysis results for fault diagnosis in a tailpipe nozzle to make some suggestions,twophase flow field is studied for a tailpipe nozzle by using the trajectory model and finite volume method to obtain the gas temperature and Mach number distributions,and to simulate the collision between the wall and different size particles under different total pressures.

Analysis of vehicle-track system vibration (Comparison between Timoshenko beam and Euler beam track model);

Meanwhile,for a droplet falling freely under gravity with horizontal projection,the track model and the longest distance in both horizontal and vertical directions are obtained.

This paper presents an orbit model capable of being applied to the collaboration of enterprises in supply chains of which the members locate in different orbits around the core enterprise in accordance with the degree in which they collaborate.