ET的意思
「ET」經常作為「Ephemeris Time」的縮寫來使用,中文意思:「星歷時間」。
ET(星歷時間)詳細解釋
- 英文縮寫詞:ET
- 英文單詞:Ephemeris Time
- 中文簡要解釋:星歷時間
- 流行度:38
- 分類:Regional
- 領域:Time Zones
英文縮寫ET的擴展資料
- The evolution of time measurement system has experienced the following stages in general : the ancient time measurement systems, universal time, ephemeris time, atomic time and universal time coordinated.時間計量系統的演變大致經歷了如下幾個階段:古代的時間計量系統、世界時、歷書時、原子時、協調世界時。
- The emphasis is given on analysis to relationship of error sources to location accuracy on platform ephemeris, echo time delays, target elevation, Doppler center frequency and time clock etc.著重分析了平臺星歷、回波時延、目標高度、多普勒中心頻率和時鐘等誤差源與定位精度的關系。
- The results show that the orbit precision of broadcasting ephemeris is about 3m in observation period of time. 3 、 The basic theory and method of making use of GPS pseudo-range observation data and SLR observation data to evaluate the precision of broadcasting ephemeris is mainly studied.結果表明,在觀測時段內,廣播星歷軌道精度總體上達到3m;。3、重點研究了偽距觀測量和激光觀測量評估廣播星歷精度的基本原理與方法。
- The results show that this method improvs the GPS satellite orbital positions coordinate calculation accuracy, and the errors calculated by making use of the broadcast ephemeris are caused by the method of extrapolation of time.結果表明,該方法確實提高了GPS衛星軌道位置坐標計算的精度。利用廣播星歷計算GPS衛星位置的誤差主要是由于時間外推方法造成的。
- The broadcast ephemeris, which is the basic of satellite navigation, must be precise and real time.導航衛星廣播星歷是衛星導航定位的基礎,要求有較高的精度和實時性。