PHASE METHOD OF SOLVING THE TASK OF RELATIVE NAVIGATION ON SPACECRAFT RENDEZVOUS WITH THE INTERNATIONAL SPACE STATION BY SIGNALS OF GPS AND GLONASS SATELLITE NAVIGATION SYSTEMS

摘要

This paper presents the results of research on implementation of spacecraft (SC) rendezvous with the International Space station (ISS) on signals of GPS and GLONASS satellite navigation systems with the use of the developed phase method of solving the relative navigation task. It is shown that the developed method provides centimeter accuracies of defining the SC and ISS relative motion parameters at the final approach phase. Thanks to this, the entire process of approach from a distance of～30 km to a contact can be implemented using the satellite navigation equipment (ASN) means without additional navigation systems. The research was conducted with the use of the MODASN program package developed by RSC Energia together with the European Space Agency to support development tests of the process of ATV rendezvous with the ISS; this program package simulates the total budget of errors of GPS and GLONASS, including shading and multipath of navigation satellite signals from the ISS structural elements. The paper also presents the results of ground tests of the developed algorithms for realization of the phase method of the relative navigation task solution with the use of ASN real equipment similar to that installed on the ISS.