Refinement of satellite ballistic factors for the estimation of atmosphere density variations and improved LEO orbit prediction

摘要

In an earlier work, Prof. Nazarenko discussed an atmosphere density tracking process that operates in parallel with the orbit determination process. This atmosphere density tracking process employs ballistic coefficient data observed over short arcs from multiple satellites. The process includes: 1. A procedure for constructing the density variations that operates on a 2- or 3-hour grid. 2. A procedure for estimating the true ballistic coefficients of the employed satellites that operates on a 28- or 56-day interval (1 or 2 monthly solar cycles). 3. Procedures for forecasting the atmosphere density at future times.