Mission Design for the Lunar Pallet Lander
Due to lighting conditions, the program decided to only fly to the north pole in June 2022 and south pole in December 2022. Starting with the June 2022 landing sites at the north pole, a trajectory scan was run for one landing per day for the latitudes from 85 up to 88 degrees at 0.5 degree incremen...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20190001934 2023-05-15T17:39:50+02:00 Mission Design for the Lunar Pallet Lander Orphee, Juan Craig, Scott Holt, James Hannan, Mike Unclassified, Unlimited, Publicly available January 13, 2019 application/pdf http://hdl.handle.net/2060/20190001934 unknown Document ID: 20190001934 http://hdl.handle.net/2060/20190001934 No Copyright, Work of the U.S. Government - Public use permitted CASI Spacecraft Design Testing and Performance Lunar and Planetary Science and Exploration M18-7143-2 AAS/AIAA Space Flight Mechanics Meeting; 13-17 Jan. 2019; Ka''anapali, HI; United States 2019 ftnasantrs 2019-07-20T23:03:47Z Due to lighting conditions, the program decided to only fly to the north pole in June 2022 and south pole in December 2022. Starting with the June 2022 landing sites at the north pole, a trajectory scan was run for one landing per day for the latitudes from 85 up to 88 degrees at 0.5 degree increments. Each landing site was at lunar dawn, which determined the landing sites longitude as described in the previous section. The results of the June 2022 scan showed that LPL had the capability to reach a landing site at least once per day for the region examined as see in in Figure 12. There appears to be a correlation between the landing sites altitude and the propellant remaining above the landers FPR, Figure 13. This is most likely due to the >10 km altitude constraint at SRM burnout. This constraint was applied to keep the lander high above the lunar terrain to avoid mountains, but can be relaxed when the full terrain data is added. Figure 12. June 2022 Nominal Usable Propellant Remaining vs Landing Date/time Similarly, the December 2022 landing sites were run showing that LPL was also capable of reaching a landing site at the Moon at least once per day. Figure 14 shows the results of the December scan, however, there were 3 landing sites that LPL could not reach. Two were very low in altitude (-5 and -4 km in altitude), which looking at the altitude trends in Figure 15, indicates that these sites may not be feasible with the current mission design. It may be possible to achieve the low altitude landing sites by lowering the SRM burnout altitude constraint, but that requires detailed terrain modeling, planned for a future phase of the analysis. The third non-reachable landing site is most likely due to an optimization error, as its altitude was high enough, at -2 km, that it should not have been a problem for the lander to arrive there. More analysis is required to verify this observation. Other/Unknown Material North Pole South pole NASA Technical Reports Server (NTRS) North Pole South Pole The Landing ENVELOPE(-45.689,-45.689,-60.733,-60.733) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Spacecraft Design Testing and Performance Lunar and Planetary Science and Exploration |
spellingShingle |
Spacecraft Design Testing and Performance Lunar and Planetary Science and Exploration Orphee, Juan Craig, Scott Holt, James Hannan, Mike Mission Design for the Lunar Pallet Lander |
topic_facet |
Spacecraft Design Testing and Performance Lunar and Planetary Science and Exploration |
description |
Due to lighting conditions, the program decided to only fly to the north pole in June 2022 and south pole in December 2022. Starting with the June 2022 landing sites at the north pole, a trajectory scan was run for one landing per day for the latitudes from 85 up to 88 degrees at 0.5 degree increments. Each landing site was at lunar dawn, which determined the landing sites longitude as described in the previous section. The results of the June 2022 scan showed that LPL had the capability to reach a landing site at least once per day for the region examined as see in in Figure 12. There appears to be a correlation between the landing sites altitude and the propellant remaining above the landers FPR, Figure 13. This is most likely due to the >10 km altitude constraint at SRM burnout. This constraint was applied to keep the lander high above the lunar terrain to avoid mountains, but can be relaxed when the full terrain data is added. Figure 12. June 2022 Nominal Usable Propellant Remaining vs Landing Date/time Similarly, the December 2022 landing sites were run showing that LPL was also capable of reaching a landing site at the Moon at least once per day. Figure 14 shows the results of the December scan, however, there were 3 landing sites that LPL could not reach. Two were very low in altitude (-5 and -4 km in altitude), which looking at the altitude trends in Figure 15, indicates that these sites may not be feasible with the current mission design. It may be possible to achieve the low altitude landing sites by lowering the SRM burnout altitude constraint, but that requires detailed terrain modeling, planned for a future phase of the analysis. The third non-reachable landing site is most likely due to an optimization error, as its altitude was high enough, at -2 km, that it should not have been a problem for the lander to arrive there. More analysis is required to verify this observation. |
format |
Other/Unknown Material |
author |
Orphee, Juan Craig, Scott Holt, James Hannan, Mike |
author_facet |
Orphee, Juan Craig, Scott Holt, James Hannan, Mike |
author_sort |
Orphee, Juan |
title |
Mission Design for the Lunar Pallet Lander |
title_short |
Mission Design for the Lunar Pallet Lander |
title_full |
Mission Design for the Lunar Pallet Lander |
title_fullStr |
Mission Design for the Lunar Pallet Lander |
title_full_unstemmed |
Mission Design for the Lunar Pallet Lander |
title_sort |
mission design for the lunar pallet lander |
publishDate |
2019 |
url |
http://hdl.handle.net/2060/20190001934 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-45.689,-45.689,-60.733,-60.733) |
geographic |
North Pole South Pole The Landing |
geographic_facet |
North Pole South Pole The Landing |
genre |
North Pole South pole |
genre_facet |
North Pole South pole |
op_source |
CASI |
op_relation |
Document ID: 20190001934 http://hdl.handle.net/2060/20190001934 |
op_rights |
No Copyright, Work of the U.S. Government - Public use permitted |
_version_ |
1766140610445574144 |