RELIABILITY DETERMINATION METHOD OF LONG-TERM PREDICTION ORBITAL DATA, PROVIDING METHOD OF THE LONG-TERM PREDICTION ORBITAL DATA, AND INFORMATION PROVIDING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a procedure for determining reliability of a long-term prediction ephemeris.;SOLUTION: In a positioning system 1, a server system 3 determines reliability of the long-term prediction ephemeris wherein a satellite orbit in a generation object period of at least one day or more is predicted by using a satellite prediction calendar which is a piece of prediction position data of a GPS satellite SV received from an external system 2 and a satellite precise calendar which is a piece of actual position data of the GPS satellite SV corresponding to the prediction position, and provides a determination result of reliability in the included state into the long-term prediction ephemeris to a cellular phone 4.;COPYRIGHT: (C)2010,JPO&INPIT