GPS全球定位系統之時間問題研究

The Timing Problems in GPS-Global Positioning System

羅逢源

《海運研究學刊》 5期 (1998/04) Pp. 31-52

https://doi.org/10.7093/MRJ.199804.0031

摘要

時間為GPS系統運作之基礎，正確的電波傳播時間差測量，及星曆時間座標取得，才能有正確的定位解算。GPS的時間有：SV時、GPS時、UTC時三種，使用者可由導航信文中取得或修正得此三種時間。1999年8月22日，GPS又有時間歸零之問題。依GPS之時間運作機制，使用者接收機只要以適當之程式運作，依本文所述儲存並比較GPS接收機出廠年份，即可通過時間歸零點，正常運作，定位導航。

關鍵字

時間 ； GPS星期 ； 導航信文

並列摘要

Timing is the operation base of GPS. By the timing of propagation time difference of satellite's wave, and the timing of system's coordinate time of satellite's ephemris, then the receiver could fix its exact position There are three kinds of time in GPS, the SV time , GPS time and UTC time. The user can acquire and transfer those GPS times from navigation message. On aug 22 1999 ,GPS meets its first timing rollerover problems. According to the mechanic function of timing in GPS, a methode will be offered in this paper to overcome the timing rollerover problems.

並列關鍵字

Time ； GPS week ； Navgation message