subastral 中文意思是什麼
subastral
解釋
adj. 形容詞 星下的，天下的，地上的。-
So combine the item of “ space targets surveillance photoelectricity telescopes arrays system ”, this thesis does research in developing space targets visualization system. the main achievement in this thesis can be summarized as follows : 1. expatiate e the basic theory of satellite track dynamic, analyse the orbit characteristic of two - body problem and launch window, subastral point calculation, visibility and coverage analysis, two - line element sets
本文結合「空間目標監視光電望遠鏡陣系統」課題，進行了空間目標可視化系統的設計和研究，主要作了以下幾方面的工作: 1 、闡述了衛星軌道動力學的基本原理，分析了二體軌道特性和發射窗口的基本特性，星下點軌跡計算、可見性和覆蓋分析和兩行根數。 -
3. expatiated on the application theory of basic orbit, including subastral point calculation, visibility analysis, coverage evaluating and spacecraft life - span estimate
3 、闡述了基本軌道應用分析理論，包括星下點軌跡計算、可見性分析、覆蓋評估和軌道壽命估算。 -
4. realize the render and display of subastral point tracks on the global satellite images. also include the display of satellite coverage ; realize the render of the three - dimension scene in which satellites orbiting the earth, including the render of satellite track and satellite model ; realize the render of scene based on the ground viewpoint, including the render of sky background, satellite ana satellite track
4 、實現了在全球衛星影像地圖上衛星的星下點軌跡的繪制和顯示，以及覆蓋區域的顯示;實現了衛星圍繞地球旋轉的三維場景顯示、衛星軌跡顯示以及衛星模型顯示;實現了以地面觀測站為觀測視點的場景顯示，地面以及天空背景顯示，衛星及衛星軌跡顯示。
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