METHOD OF PROVIDING MOBILE STATION OF SATELLITE POSITIONING SYSTEM WITH AUXILIARY DATA Russian patent published in 2011 - IPC G01S19/08 

FIELD: information technology.

SUBSTANCE: request for auxiliary data issued by a mobile station is received at a server station and in response to the request, the server station sends to the server station ephemeral data as part of auxiliary data. After receiving the request for auxiliary data issued by the mobile station, the server station decides on the possibility of the mobile station reaching given accuracy for determining location is provided with transmitted ephemeral data. In the affirmative case, the server station sends transmitted ephemeral data to the mobile station. In the negative case, the server station sends to the mobile station long-term ephemeral data instead of transmitted ephemeral data as part of the requested auxiliary data. The long-term ephemeral data are extracted from forecasts of orbit satellites and they have validity interval which is sufficiently long compared to the ephemeral data transmitted by satellites.

EFFECT: high accuracy of position finding.

8 cl, 3 dwg