subastral मीनिंग इन हिंदी

3 . expatiated on the application theory of basic orbit , including subastral point calculation , visibility analysis , coverage evaluating and spacecraft life - span estimate
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
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