Modified navigation algorithm for GPS / GLONASS positioning of the space consumer
Control and navigation systems
Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
The problem of location determining of an artificial Earth satellite (AES) using the Global Navigation Satellite Systems (GNSS) GPS and GLONASS was considered. To improve the accuracy of navigation it is proposed to use a modified navigation algorithm, which, in addition to measurements of GNSS, uses information about the motion of the satellite model in non-central gravitational field of the Earth. There is also considered the specific challenges with which the companies pursuing international manufacturing strategies are faced.The mathematical modeling of the orbital segment GNSS GPS and GLONASS, disturbances, and movement of space consumer were used for the research. The disturbances on the satellite, inaccurate knowledge of satellite ephemeris and time were mathematically modeled.The resulting navigation algorithm can be used for navigation of nano-satellites, remote sensing satellites and scientific satellites. In addition, these algorithms can be used in navigation of aircraft moving along the ballistic trajectory.The present study provides a starting-point for further research on advanced model of orbital consumers. Research can be carried out by the refined model of the consumer motion. The correct motion model is able to compensate the perturbations provided by non-spherical gravitational field of the Earth, gravity of the moon and the sun, the pressure force of sunlight.The use of modified navigation algorithm can significantly improve the accuracy of consumer navigation space, especially in the field of continuous navigation. The appliance of this method allowed to increase the accuracy by 75% in comparison with the least square method.
Keywords:satellite navigation, artificial satellite, space consumer, modified Kalman filter, satellite motion model
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