precise ranging 中文意思是什麼
precise ranging
解釋
精密測距-
Precise maneuverability of the mini unmanned helicopter makes them useful for many critical tasks ranging from rescue and security to inspection and aerial mapping. therefore, the mini unmanned helicopter systems have recently attracted considerable attention. for instance, more and more universities and institutes enter the international aerial robotics competition to show their new advanced uav systems annually
微型無人自主直升機在偵察和巡邏、建築物勘察、航空地圖繪制、危險環境下的清障等軍事和民用特殊領域顯示出了巨大的應用潛力，國外對微型無人自主直升機展開了廣泛而深入的研究，每年一次的國際空中機器人比賽吸引了眾多的參加者。 -
The key technology of it is passive ranging, while the key of ranging is the high precise time delay estimation, which is the main factor that restricts the precision of ranging
其關鍵技術是測量目標距離，而距離測量的關鍵是高精度的時延測量。時延測量精度是制約距離測量精度的主要因素。 -
The key technology is passive ranging, while the key of ranging is the high precise time delay estimation
其關鍵技術是精確測量目標距離，而精確測量距離的關鍵是高精度的時延測量。 -
The third chapter involves some problems on attitude determination and integrity ambiguity resolving. using three formation flying satellites for an earth observation as an example, the forth chapter contains some problems about determination of inter - satellite position, attitude and time, by using high precise pseudo - ranging observation onboard pseudolites. the problems are the selecting of coordinate system and independent state parameters, the setting of observation equations, and the conversion of constellation ' s states
第四章以三星編隊星座為例，討論利用擴展的高精度星間偽距觀測進行星間相對位置、姿態和時間參數確定的一些問題，包括：坐標系、獨立參數的選取、觀測方程的建立和星座狀態的轉換等。 -
By closely monitoring the precise frequencies of the spectrum that were lost in the passage the passage through empty space, astronomers were actually able to pinpoint the size of different types of these grains, all ranging from less than 1 / 100th of a micron to 10 microns in size, with each micron representing one millionth of a meter
通過對穿越真空途中丟失了的光的精細頻率的密切監視，天文學家已經基本上可以查明這些不同微粒的大小，大小從小於百分之一微米到十微米之間，一微米表示一米的百萬分之一。
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