Use of GNSS for autonomous navigation on medium Earth orbits

Use of GNSS for space navigation is relatively cheap solution that provides a possibility to find your own position, improved recovery time after manoeuvres for spacecraft and satellites, etc. Medium Earth orbits are not that interesting for business; but they still have their own use. The research provides information about availability of different satellite constellations and some data on accuracy of navigation solution for the medium Earth orbitsNational Aviation University, Kyiv, Ukrain