Editing Lunar Reconnaissance Orbiter part 2
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Click '''Nxt''' 4 times so that ''Delta Velocity'' is highlighted, and click '''Set'''. | Click '''Nxt''' 4 times so that ''Delta Velocity'' is highlighted, and click '''Set'''. | ||
Click '''TGT''', and enter '''Moon'''. | Click '''TGT''', and enter '''Moon'''. | ||
− | Click '''Nxt''' | + | Click '''Nxt''' 5 times so that ''dVf'' is highlighted, click '''Set''', and enter '''0'''. |
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In the right MFD click '''PG''', then '''Plan'''. | In the right MFD click '''PG''', then '''Plan'''. | ||
In the left MFD, adjust '''dVf''', and '''dVp''' so that ''EqI'' and ''PeA'' in the right MFD | In the left MFD, adjust '''dVf''', and '''dVp''' so that ''EqI'' and ''PeA'' in the right MFD | ||
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Be as accurate as possible here. LRO is planning on avoiding a mid-course correction if possible. In orbiter, we will probably still have to do a small | Be as accurate as possible here. LRO is planning on avoiding a mid-course correction if possible. In orbiter, we will probably still have to do a small | ||
MCC. | MCC. | ||
− | When your adjustments are done, click | + | When your adjustments are done, click '''PG''', '''BV''', and '''AB'''. |
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When the burn is done, click '''BV''', and '''PG'''. In the Right MFD, click '''Plan''' to turn off plan mode. | When the burn is done, click '''BV''', and '''PG'''. In the Right MFD, click '''Plan''' to turn off plan mode. | ||
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In the right MFD, click '''Plan''' so that the green line turns blue. | In the right MFD, click '''Plan''' so that the green line turns blue. | ||
In the left MFD adjust '''dVp''' and '''dVf''' so that ''EqI'' and ''PeA'' in the left MFD are as close as possible | In the left MFD adjust '''dVp''' and '''dVf''' so that ''EqI'' and ''PeA'' in the left MFD are as close as possible | ||
− | to 90 degrees and | + | to 90 degrees and 216k respectively |
When these adjustments are finished, click '''PG''','''BV''', then '''AB''' in the right MFD. | When these adjustments are finished, click '''PG''','''BV''', then '''AB''' in the right MFD. | ||
When the burn completes, click '''Plan''' in the left MFD so the blue line returns to green. | When the burn completes, click '''Plan''' in the left MFD so the blue line returns to green. | ||
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Click on the '''HUD''' button on the right MFD. Change the MFD to IMFD map mode. | Click on the '''HUD''' button on the right MFD. Change the MFD to IMFD map mode. | ||
Set the '''TGT''' to '''LRO''', '''REF''' to '''Moon'''. | Set the '''TGT''' to '''LRO''', '''REF''' to '''Moon'''. | ||
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In the left MFD select IMFD course, then click on '''PRV''' and select ''Delta Velocity'' mode. | In the left MFD select IMFD course, then click on '''PRV''' and select ''Delta Velocity'' mode. | ||
Click '''REF''' and enter '''Moon''', and click '''TGT''', and enter '''LRO'''. | Click '''REF''' and enter '''Moon''', and click '''TGT''', and enter '''LRO'''. | ||
− | + | Set ''TEj'' to '''2k''', and set ''dVf'' to '''-520'''. | |
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− | + | Note that The burn time to a circular orbit is over 4k seconds (over an hour!). Make sure rotational mode is selected. | |
− | + | At 2k seconds to PeT, select Retrograde mode on the hud. When retrograde attitude | |
− | + | is established, de-select retrograde mode. | |
− | + | Start the engine by pressing '''numpad-+''' and tap the '''CTRL''' key to keep it burning. | |
− | + | Notice that the PeA in the right MFD is decreasing. | |
− | + | Use the numpad '''1''' and '''3''' keys to move the attitude closer to what the Orbital IMFD mode | |
− | + | thinks it should be until the PeA starts increasing. | |
− | + | Keep adjusting the attitude between these points to keep the PeA as close as possible to 216km. | |
− | + | When the ApA. parameter in the Right MFD is 3160km, press the '''numpad-*''' key to stop the burn. | |
− | + | The LRO then completes 4 orbits at 3160km x 216km before the next burn, | |
− | + | you can switch focus to AV020Centaur and enjoy the view as it passes by the moon. | |
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− | When the | ||
− | you can switch focus to AV020Centaur and enjoy the view as it passes by the moon. | ||
− | After the flyby, switch back to LRO and after 4 orbits, wait until | + | After the flyby, switch back to LRO and after 4 orbits, wait until PeT |
− | is | + | is 800k. Press the retrograde button, and de-select it when retrograde attitude is achieved. |
Follow the procedure above to make the second burn, | Follow the procedure above to make the second burn, | ||
− | + | keeping PeA as close as possible to 216km, and burn until ApA is 967km. | |
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After another 5 complete orbits at 216km x 967km, make a third burn to circularize your orbit at 216km. | After another 5 complete orbits at 216km x 967km, make a third burn to circularize your orbit at 216km. | ||
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Make a final burn on your next pass over the North Pole to reduce your PeA to 30km near the South Pole. | Make a final burn on your next pass over the North Pole to reduce your PeA to 30km near the South Pole. | ||
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=== LRO Orbit Circularization === | === LRO Orbit Circularization === | ||
60 days after your last LRO orbit insertion burn, | 60 days after your last LRO orbit insertion burn, | ||
− | switch focus to LRO, and at Perilune over the south pole, burn retrograde until the ApA is | + | switch focus to LRO, and at Perilune over the south pole, burn retrograde until the ApA is 50km. |
− | === LCROSS Lunar pole | + | === LCROSS Lunar pole targetinjg === |
Switch focus back to AV020Centaur. When the PeT is 130k Set IMFD map in the left MFD and IMFD Base approach in the right MFD. | Switch focus back to AV020Centaur. When the PeT is 130k Set IMFD map in the left MFD and IMFD Base approach in the right MFD. | ||
In the left MFD set target Moon and center to Self ('''x''') | In the left MFD set target Moon and center to Self ('''x''') | ||
Click on '''Sel''' until ''Ref Moon'' is displayed with a negative PeA. | Click on '''Sel''' until ''Ref Moon'' is displayed with a negative PeA. | ||
In the right MFD click '''REF''', and type '''Moon'''. | In the right MFD click '''REF''', and type '''Moon'''. | ||
− | Click '''Nxt''' until ''Hint'' is highlighted. Click '''Set''' and type the value shown for '' | + | Click '''Nxt''' until ''Hint'' is highlighted. Click '''Set''' and type the value shown for ''PeA'' in the left MFD. |
Click '''Prv''' until ''Lat'' is highlighted. Click '''Set''' and type '''89.9''' | Click '''Prv''' until ''Lat'' is highlighted. Click '''Set''' and type '''89.9''' | ||
Click '''Nxt''', then '''Set''' and set the ''Alt'' to '''0'''. | Click '''Nxt''', then '''Set''' and set the ''Alt'' to '''0'''. | ||
− | Click '''Nxt''', then '''Set''' and set the ''ReA'' (Re-enty Angle) to ''' | + | Click '''Nxt''', then '''Set''' and set the ''ReA'' (Re-enty Angle) to '''75''' |
Click '''Nxt''', then '''Set''' and set the ''Ant'' parameter to '''0''' | Click '''Nxt''', then '''Set''' and set the ''Ant'' parameter to '''0''' | ||
You may need to reset the ''Hint'' Parameter at this time to the current PeT. | You may need to reset the ''Hint'' Parameter at this time to the current PeT. | ||
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=== LCROSS LRO targeting === | === LCROSS LRO targeting === | ||
+ | * ~7 hours prior to impact, LCROSS will separate from Centaur upper stage and perform a ~4-minute delay maneuver (~23 m/s) to enable LCROSS to fly through Centaur impact plume | ||
In the left MFD, click '''REF''' and type '''Moon''', then click '''TGT''' and type '''LRO''' | In the left MFD, click '''REF''' and type '''Moon''', then click '''TGT''' and type '''LRO''' | ||
Click '''PRJ''' until ''Target'' is displayed in the lower left corner. | Click '''PRJ''' until ''Target'' is displayed in the lower left corner. | ||
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=== LCROSS Separation === | === LCROSS Separation === | ||
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Wait until Pet in the Left MFD is 25k. | Wait until Pet in the Left MFD is 25k. | ||
In the right MFD, minimize ''dV'' by adjusting ''ReA'', and make the burn. | In the right MFD, minimize ''dV'' by adjusting ''ReA'', and make the burn. | ||
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[http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20080038058_2008037121.pdf LRO Navigation Overview] | [http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20080038058_2008037121.pdf LRO Navigation Overview] | ||
− | == | + | == TODO == |
− | * | + | *Fix procedure for actual mission parameters |
− | *LRO | + | *LRO autoburn LOI burns |
− | * | + | *** Target a specific crater |
− | * | + | ** Try IMFD slingshot mode to refine flyby once in lunar SOI |
− | * | + | * Convert to .CHM for help mode within orbiter |
− | + | * Add images | |
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