A-GPS<\/a> ist ein Verfahren, bei dem der GPS-Chip bestimmte Informationen \u00fcber Satellitenstandorte, Satellitenstatus, etc. erh\u00e4lt. Dadurch kann der sogenannte “Fix”, also die Posititonsbestimmung, deutlich schneller durchgef\u00fchrt werden als ohne diese Informationen, oft innerhalb weniger Sekunden.<\/p>\nBei Handys ist dieses Verfahren seit Jahren Standard. Diese beziehen die A-GPS-Daten online aus dem Internet. Bei den meisten Navis ist dies nicht m\u00f6glich (abgesehen von denen, die eine SIM-Karte zur M2M-Kommunikation enthalten). Sehr clever ist daher die Aktualisierung \u00fcber ein Programm auf dem PC. Die A-GPS-Daten werden \u00fcblicherweise f\u00fcr einen Zeitraum von etwa sechs Tagen in die Zukunft von einem Feed-Server herunter geladen (so ist es jedenfalls bei meinem Bluetooth-GPS-Dongle). In diesem Zeitraum steht dann A-GPS-Unterst\u00fctzung zur Verf\u00fcgung. Danach muss das Navi wieder an den PC, sonst kann nur reines hardwarebasiertes GPS durchgef\u00fchrt werden, bei dem ein Fix durchaus mal 30-60 Sekunden dauern kann.<\/p>\n","protected":false},"excerpt":{"rendered":"
TomTom bietet offline-A-GPS f\u00fcr Navis.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[67],"tags":[],"class_list":["post-417","post","type-post","status-publish","format-standard","hentry","category-personal-navigation-devices"],"yoast_head":"\n
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