Choliy V. Global geodynamics models and their testing from reprocessing of satellite observations

The purpose of this study is a solution of space geodynamics tasks by the new numerical theory of satellite motion, development of the mathematics methods and software to make the better precision geodynamics models, creating the newer approaches and setting up own observation and processing programs. Main approach consists in interpreting the geodynamic model as the object of analysis, itself, without links and dependencies with other models or observation method. Mathematical methods were developed and software was built to allow interpretation of all spectrum of models from the same positions. In some models there were errors found and corrected. Statistical testing procedure was introduced. Centimeter level numerical theories of motion of middle and low Earth’ orbiters were built with the precision sufficient to explain the observations. Their precision was determined. The software was written based upon these theories which allows to proceed all satellite system observations (SLR, LLR, DORIS, GNSS, VLBI). The Juliette software for solving the geodynamics tasks in distributed environment was built, tested and started an exploitation. Data processing center have been started with the special attention to low Earth orbiters. The most interesting result is that we are able to process low Earth orbiters observations for the determination of the Earth orientation parameters.