MontBlanc2012
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Here's a challenge that might appeal:
NASA has proposed parking its planned LOP-G (Lunar Orbital Platform Gateway) station in a Near Rectilinear Halo Orbit (NRHO) and, from this station, allow lunar landers to target landing at any site on the Moon's surface. This raises interesting questions about the most fuel efficient strategies to depart LOP-G and land on the surface; and, equally, to depart the Moon and rendezvous with LOP-G.
Following on from recent postings in relation to halo orbits (See here), I've constructed a scenario with two Delta-Gliders. The first Delta-Glider is parked in a LOP-G style NRHO; and the second is at Brighton Beach. One can either try to find the most fuel-efficient for the first Delta-Glider to land at Brighton Beach from its LOP-G orbit; or one can take the Brighton Bach Delta-Glider and find a fuel efficient rendezvous strategy for rendezvousing with the Delta-Glider.
The Near Rectilinear Halo Orbit that the first Delta-Glider is placed in is a fair proximities for the 'real' proposed LOP-G orbit: it's a L2 halo orbit with a near 4:1 synodic orbital resonance - so this challenge will do a fair job of simulating the type of problems that one might encounter in landing and rendezvousing.
The scenario is as follows:
Just cut and paste this into a .scn text file and place in your scenario directory. Then load and run.
There are no 'rules' for this scenario other than that for the Brighton-Beach to LOP-G rendezvous variant, the orbit of the LOP-G vessel must not be changed. It's on a carefully calculated ballistic trajectory and it's orbit cannot change.
And don't take too long: the orbiting Delta-Glider isn't subject to active station-keeping and after one orbit will start to deviate significantly from the NRHO track.
NASA has proposed parking its planned LOP-G (Lunar Orbital Platform Gateway) station in a Near Rectilinear Halo Orbit (NRHO) and, from this station, allow lunar landers to target landing at any site on the Moon's surface. This raises interesting questions about the most fuel efficient strategies to depart LOP-G and land on the surface; and, equally, to depart the Moon and rendezvous with LOP-G.
Following on from recent postings in relation to halo orbits (See here), I've constructed a scenario with two Delta-Gliders. The first Delta-Glider is parked in a LOP-G style NRHO; and the second is at Brighton Beach. One can either try to find the most fuel-efficient for the first Delta-Glider to land at Brighton Beach from its LOP-G orbit; or one can take the Brighton Bach Delta-Glider and find a fuel efficient rendezvous strategy for rendezvousing with the Delta-Glider.
The Near Rectilinear Halo Orbit that the first Delta-Glider is placed in is a fair proximities for the 'real' proposed LOP-G orbit: it's a L2 halo orbit with a near 4:1 synodic orbital resonance - so this challenge will do a fair job of simulating the type of problems that one might encounter in landing and rendezvousing.
The scenario is as follows:
Code:
BEGIN_ENVIRONMENT
System Sol
Date MJD 52013.754909351
Help CurrentState_img
END_ENVIRONMENT
BEGIN_FOCUS
Ship GL-02
END_FOCUS
BEGIN_CAMERA
TARGET GL-02
MODE Cockpit
FOV 40.00
END_CAMERA
BEGIN_SHIPS
GL-01:Deltaglider
STATUS Landed Moon
POS -33.4450800 41.1217030
HEADING 66.59
ALT 2.553
AROT 18.270 -16.773 41.004
AFCMODE 7
PRPLEVEL 0:1.000000 1:1.000000
NAVFREQ 0 0 0 0
XPDR 0
HOVERHOLD 0 1 0.0000e+000 0.0000e+000
GEAR 1.0000 0.0000
AAP 0:0 0:0 0:0
END
GL-02:DeltaGlider
STATUS Orbiting Moon
RPOS -16083384.788 -3158071.948 -5516819.356
RVEL 382.8380 536.2102 146.3039
AROT 74.634 -34.764 -157.159
AFCMODE 7
PRPLEVEL 0:1.000000 1:1.0000000
NAVFREQ 586 466 0 0
XPDR 0
HOVERHOLD 0 1 0.0000e+000 0.0000e+000
AAP 0:0 0:0 0:0
SKIN BLUE
END
END_SHIPS
Just cut and paste this into a .scn text file and place in your scenario directory. Then load and run.
There are no 'rules' for this scenario other than that for the Brighton-Beach to LOP-G rendezvous variant, the orbit of the LOP-G vessel must not be changed. It's on a carefully calculated ballistic trajectory and it's orbit cannot change.
And don't take too long: the orbiting Delta-Glider isn't subject to active station-keeping and after one orbit will start to deviate significantly from the NRHO track.
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