| 摘要 |
PROBLEM TO BE SOLVED: To provide a planetarium projection system in which a plurality of flight paths are registered, an operator easily selects desired flight path and natural images are maintained to audience. SOLUTION: Every set flight path is read first and present location P is then acquired, and one of the read flight paths is extracted to determine if the flight path stating point Ps is the same as the present location P. If yes, the flight path is displayed on an operation screen. If not, the flight path is not displayed. These processes are performed for the remaining flight paths. This processing is performed for every renewal of operation picture. COPYRIGHT: (C)2005,JPO&NCIPI
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