@inproceedings{b2376db311a3494bb11231af5be411da,
title = "Improving lunar return entry footprints using enhanced skip trajectory guidance",
abstract = "The impending development of NASA's Crew Exploration Vehicle (CEV) will require a new entry guidance algorithm that provides sufficient performance to meet all requirements. This study examined the effects on entry footprints of enhancing the skip trajectory entry guidance used in the Apollo program. The skip trajectory entry guidance was modified to include a numerical predictor-corrector phase during atmospheric skip portion of the entry trajectory. Four degree-of-freedom simulation was used to determine the footprint of the entry vehicle for the baseline Apollo entry guidance and predictor-corrector enhanced guidance with both high and low lofting at several lunar return entry conditions. The results show that the predictor-corrector guidance modification significantly improves the entry footprint of the CEV for the lunar return mission. The performance provided by the enhanced algorithm is likely to meet the entry range requirements for the CEV.",
author = "Putnam, {Z. R.} and Braun, {R. D.} and Bairstow, {S. H.} and Barton, {G. H.}",
year = "2006",
month = dec,
day = "1",
language = "English (US)",
isbn = "1563478242",
series = "Collection of Technical Papers - Space 2006 Conference",
pages = "2230--2244",
booktitle = "Collection of Technical Papers - Space 2006 Conference",
note = "Space 2006 Conference ; Conference date: 19-09-2006 Through 21-09-2006",
}