| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To shorten sufficiently TTFF (Time To First Fix) by performing in a short time, operation processing for calculating a self-position of a user terminal, after acquiring a receivable satellite. <P>SOLUTION: This satellite positioning system 10 includes: a plurality of GPS satellites 1 for transmitting GPS positioning signals; an observation station 2 for transmitting reinforcement data generated based on the received positioning signal to a reinforcement information generation uplink station; the reinforcement information generation uplink station 3 for generating a reinforcement message based on the received reinforcement data, and transmitting it to a reinforcement satellite; the reinforcement satellite 4 including, for example, a quasi-zenith satellite, for performing PSK modulation of the same frequency as a carrier wave of the positioning signal by the reinforcement message based on the reinforcement information in the received reinforcement message, and transmitting a signal including five kinds of parameters ofδr,ψ,λ,δi,δn to a GPS reinforcement user terminal; and the reinforcement user terminal 5 for receiving the positioning signal, and receiving the signal from the reinforcement satellite 4. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
