 | Elliptic orbits |
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 | Impulsive Deboost for Maximum and Minimum Atmospheric Entry Angles
Author : Nagpal, O.P. ;Srivastava, T.N.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 27-30
Subject : 629.76 Rockets and Missiles
Keywords : Elliptic Orbits ;Rocket Vehicles
Abstract : Deboost of rocket vehicles initially moving in elliptic orbits for maximum and minimum atmospheric entry is analysed. It is shown that in general with specified retrofire velocity impulse and entry altitude, maximum entry angle is obtained when impulse is applied tangentially at the apogee whereas entry angle occurs when retrofire impulse is applied tangentially at the perigee. Existence conditions for only maximum or minimum or both neither maximum nor minimum entry have also been investigated. |
| | Maximum Atmospheric Entry Angle for Specified Retrofire Impulse
Author : Nagpal, O.P. ;Srivastava, T.N.
Source : Defence Science Journal ; Vol:19(3) ; 1969 ; pp 177-182
Subject : 531.3 Dynamics;531 Mechanics
Keywords : Retrofire impulse ;Elliptic orbits
Abstract : Maximum atmospheric entry angles for vehicles initially moving in elliptic orbits are investigated and it is shown that tangential retrofire impulse at the apogee results in the maximum entry angle. Equivalence of maximizing the entry angle and minimizing the retrofire impulse is also established. |
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