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The Effect of Lift on Entry Corridor Depth and Guidance Requirements for the Return Lunar FlightCorridors for manned vehicles are defined consistent with requirements for avoiding radiation exposure and for limiting values of peak deceleration. Use of lift increases the depth of the entry corridor. Mid-course guidance requirements appear to be critical only for the flight-path angle. Increasing the energy of the transport orbit increases the required guidance accuracy for the flight-path angle. Corrective thrust applied essentially parallel to the local horizontal produces the maximum change in perigee altitude for a given increment of velocity. Energy required to effect a given change in perigee altitude varies inversely with range measured from the center of the earth.
Document ID
19980232890
Acquisition Source
Ames Research Center
Document Type
Other - NASA Technical Report (TR)
Authors
Wong, Thomas J. (NASA Ames Research Center Moffett Field, CA United States)
Slye, Robert E. (NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1961
Subject Category
Astrodynamics
Report/Patent Number
NASA-TR-R-80
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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