An Improved Orbit Model of Space Target Radar Based on Least Square Method and Its Program Implementation

Space target orbit determination module is an important component of the space target surveillance radar system. The development of this module requires very complex aerospace dynamics knowledge, which brings great difficulties to nonorbit mechanics researchers engaged in radar system design. Orbit improvement is a core content of orbit determination, and it is a necessary step to achieve high-precision orbit calculations. To this end, this paper focuses on the issue of batch processing orbit improvement of space target surveillance radar, introduces the principle of least-squares orbit improvement, the partial derivative of the model, and the main perturbation acceleration calculation methods, and gives the program design principle and implements the RadarOrbDet library. The developed library is compared and analyzed with STK and ODTK software, and the simulation results verify the effectiveness of the library. The library is also helpful for designers of space target surveillance radar systems to carry out a rapid demonstration of orbit determination indicators.