3.2.3.6 Trimble GPS for Machine Control, FAA Certification
September 16th, 1999 at ION, Trimble (booth N) unveiled its BD750, a compact (100 x 177mm) real-time kinematic GPS card for machine and vessel positioning, guidance, and control applications. Capable of centimeter-level positioning, the card can deliver positions to guidance or control loop software with a latency of less than 20 milliseconds. For even more precise applications, it can provide horizontal accuracies of 1 centimeter at 5 Hz with a small increase in latency. The company also announced that it has just received the first FAA certification for a dual-use 12-channel GPS receiver for it's TA-12.
(URL http://www.gpsworld.com/ion/thurs/thurs_13.htmから引用)
3.3 関連情報
3.3.1 米国1999FRP
米国が1999 Federal Radionavigation Plan(第10版)を正式発行した。(2000年2月)
(URL http://www.navcen.uscg.mil/frp/FRP.htmからdownload可能)
3.3.1.1 第1.7章からの抜粋
“Federal Policy on the Radionavigation System Mix”
GPS:...U.S. Government policy is to discontinue the use of SA by the year 2006. ...
...Consequently, the US Government has determined that availability of not one, but two additional C/A coded signals is essential for many critical uses of GPS. The additional signals are planned to enhance the ability of GPS to support all civil users. A second non-safety-of-life coded signal will be added at the GPS L2 Frequency (1227.60 MHz) on the satellites scheduled for launch beginning in 2005. A third civil signal that can meet the needs of critical safety-of-life applications such as civil aviation will be added at 1176.45 MHz. The third signal will be implemented on the satellites scheduled for launch beginning in 2007. ...
[和訳例]
米国は、2006年までにSAを廃止する。第2のC/Aコード信号を全ての民用ユーザー向けに追加する計画があり、2005年から打ち上げが予定されている衛星からL2周波数（(1227.60MHz)にC/Aコードが追加される予定である。安全性が重要な民間航空用等のアプリケーションの要求を満足する、第3の民用信号は、周波数1176.45MHzに割り当てられ、2007年打ち上げ予定の衛星から実装される予定である。
