| 摘要 |
In a satellite position fixing system, where an earth station 38 communicates with a satellite 10 which, in turn, communicates with selectable ones out of a plurality of user terminals 44 whose position, on the surface of the earth 14, is measured, the accuracy of measurement of the position of the satellite 10 is improved by using all of the user terminals 44 as further triangulation points, the improved position being incorporated in further user terminal 44 position determinations, and so on to create a cumulative improvement. Weighting is applied so that user terminals 44 with large errors in triangulation are given small significance and those with small errors are given great significance. <IMAGE> |
