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Earth’s closest neighbor is holding a secret. In 1999, hints of that secret were revealed in the form of concentrated hydrogen signatures detected in permanently shadowed craters at the lunar poles by NASA’s Lunar Prospector. These readings may be an indication of lunar water and could have far-reaching implications as humans expand exploration past low-Earth orbit. The Lunar CRater Observing and Sensing Satellite (LCROSS) mission is seeking a definitive answer.
 
Earth’s closest neighbor is holding a secret. In 1999, hints of that secret were revealed in the form of concentrated hydrogen signatures detected in permanently shadowed craters at the lunar poles by NASA’s Lunar Prospector. These readings may be an indication of lunar water and could have far-reaching implications as humans expand exploration past low-Earth orbit. The Lunar CRater Observing and Sensing Satellite (LCROSS) mission is seeking a definitive answer.
  
=== Required add-ons ===
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=== required add-ons ===
* [http://users.kymp.net/p501474a/Orbiter/Orbiter.html IMFD 4.2.2]
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* [http://koti.mbnet.fi/jarmonik/Orbiter.html IMFD 5.1m]
* [http://orbithangar.com/showAddon.php?id=f12093c1-4d5e-4a57-b2e2-427a205f82ee Multistage2015 for Orbiter 2010] (install the add-on and copy "Multistage2015.dll" under the "Modules" folder to "Multistage2.dll")
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* [http://users.swing.be/vinka/ Multistage2(full package)]
  
=== Optional add-ons ===
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=== optional add-ons ===
  
 
* [http://orbithangar.com/searchid.php?ID=3165 Attitude MFD]  
 
* [http://orbithangar.com/searchid.php?ID=3165 Attitude MFD]  
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== Add-on Notes and Quick Info ==
 
== Add-on Notes and Quick Info ==
'''NOTES'''
 
  
''Moon Orientation''<br>
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== Procedures ==
 +
Accuracy of burns in this mission is '''CRITICAL'''.
 +
During this mission, especially after the TLI burn, we will be using the tools TransX or IMFD to get the '''DIRECTION''' of our burns, and using IMFD map to monitor in real time the '''MAGNITUDE''' of the DeltaV we are imparting. For this mission, usually the AUTOBURN button is '''NOT''' your friend.
 +
 
 
The precession of the Moon's axis is not modelled in Orbiter. To ensure accuracy of the Moon's orientation at the time of the mission, the LRO add-on uses a custom sol.cfg and moon.cfg located in the Config/LRO/ directory. To use them, the "Environment" entry in the scenario file must point to the LRO/sol.cfg.
 
The precession of the Moon's axis is not modelled in Orbiter. To ensure accuracy of the Moon's orientation at the time of the mission, the LRO add-on uses a custom sol.cfg and moon.cfg located in the Config/LRO/ directory. To use them, the "Environment" entry in the scenario file must point to the LRO/sol.cfg.
 
e.g.
 
e.g.
 
  BEGIN_ENVIRONMENT
 
  BEGIN_ENVIRONMENT
   '''System LRO/Sol'''
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   System '''LRO/Sol'''
 
   Date MJD 54892.2256944444
 
   Date MJD 54892.2256944444
 
  END_ENVIRONMENT
 
  END_ENVIRONMENT
 
 
''Launch Date''<br>
 
Although the launch is currently scheduled for 24th April 2009, the primary launch scenario provided in this add-on is the 27th April 2009 due to the mission constraints on the LAN of LRO's final Lunar orbit. The second launch scenario provided is for the 24th April 2009, should you wish to use it.
 
 
''Transx version''<br>
 
This document assumes the default Transx version supplied with Orbiter. Other versions may give different lunar intercept times.
 
 
 
'''QUICK INFO'''
 
 
''LRO''<br>
 
Final Lunar orbit - 30km x 70km, 90deg inclination(Equatorial), Periselene over South Pole,<br>
 
LAN = 38deg(Ecliptic) +/- 17deg(max.)
 
 
 
''LCROSS/AV020Centaur''<br>
 
Uses Lunar flyby to reach high-inclination Earth orbit,<br>
 
Spacecraft:Moon orbit resonance 2:3 (other resonances possible)
 
 
Impact chosen target at North Pole of Moon (targets designated by surface bases "Lcross_A" to "Lcross_E"),  impact speed ~2.5km/s, impact angle > 60deg.
 
 
Lcross separates from AV020Centaur at impact -9hrs. Lcross impact 4mins after AV020Centaur.
 
 
Impact should be timed to be visible by LRO passing over and by ground-based observers in Hawaii during hours of darkness.
 
 
== Procedures ==
 
Accuracy of burns in this mission is '''CRITICAL'''.
 
  
 
=== Launch ===
 
=== Launch ===
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  Click '''-''' twice so that ''accuracy'' is set to ''Max''.
 
  Click '''-''' twice so that ''accuracy'' is set to ''Max''.
 
  Click '''MOD''' twice to return to the map display with equatorial parameters.
 
  Click '''MOD''' twice to return to the map display with equatorial parameters.
Wait until the ''TEj'' parameter in the left display is ''1k'' or less.
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Wait until the ''TEj'' parameter in the left display is ''1k''
 
  In the left MFD, Click '''MOD''', and ''Offset Disabled'' should be highlighted.  
 
  In the left MFD, Click '''MOD''', and ''Offset Disabled'' should be highlighted.  
 
  Click '''+''' twice and ''Vel. Frame'' should be displayed. Click '''Nxt''' until ''Lon'' is highlighted.  
 
  Click '''+''' twice and ''Vel. Frame'' should be displayed. Click '''Nxt''' until ''Lon'' is highlighted.  
  Click '''Set''' and enter '''65'''. Click '''Nxt''' and ''Lat'' should be highlighted.  
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  Click '''Set''' and enter '''83'''. Click '''Nxt''' and ''Lat'' should be highlighted.  
  Click '''Set''' and enter '''-59.8'''. Click '''Nxt''', then '''Set''', and enter '''20.3M''' for ''Rad''.  
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  Click '''Set''' and enter '''19.5'''. Click '''Nxt''', then '''Set''', and enter '''11.39M''' for ''Rad''.  
  Adjust the ''Rad'' and ''Lat'' parameters to get the ''PeA'' and ''EqI'' parameters in the right MFD as close
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  Adjust the ''Rad'' and ''Lat'' parameters to get the ''PeA'' and ''RIn'' parameters in the right MFD as close
 
  as possible to ''350k'' and ''90'' degrees. Repeat as necessary. Click '''Pg''', then '''BV''', then '''AB'''.
 
  as possible to ''350k'' and ''90'' degrees. Repeat as necessary. Click '''Pg''', then '''BV''', then '''AB'''.
 
  Disengage the ''Prograde'' autopilot.
 
  Disengage the ''Prograde'' autopilot.
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  Click '''+''', then '''Nxt''' four times until ''Delta Velocity'' is highlighted.  
 
  Click '''+''', then '''Nxt''' four times until ''Delta Velocity'' is highlighted.  
 
  Click '''Set'''. Click '''TGT''', and type '''Moon'''.
 
  Click '''Set'''. Click '''TGT''', and type '''Moon'''.
  Click '''Nxt''', then '''Set''', and set ''TEj'' to '''400'''.
+
  Click '''Nxt''' four times until ''dVf'' is highlighted.  
Click '''Nxt''' three times until ''dVf'' is highlighted.  
 
 
  Click '''Set''', and enter '''0'''.
 
  Click '''Set''', and enter '''0'''.
 
  in the Right MFD, click '''Plan''' so the green course line turns blue.
 
  in the Right MFD, click '''Plan''' so the green course line turns blue.
 
  In the left MFD, adjust ''dVp'' and ''dVf'' so that ''RIn'' and ''PeA'' in the right MFD
 
  In the left MFD, adjust ''dVp'' and ''dVf'' so that ''RIn'' and ''PeA'' in the right MFD
  are as close as possible to ''90'' degrees, and ''1.5M'', respectively.
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  are as close as possible to ''90'' degrees, and ''2.5M'', respectively.
Click '''Prv''' until ''TEj'' is highlighted and set it to '''0'''.
 
 
  Click '''PG''', '''BV''', and '''AB'''.
 
  Click '''PG''', '''BV''', and '''AB'''.
 
  When the burn is finished, click '''BV''', and '''PG''' in the left MFD, and '''Plan''' in the right MFD.
 
  When the burn is finished, click '''BV''', and '''PG''' in the left MFD, and '''Plan''' in the right MFD.
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My current solution is Inc Angle of 110.99 degrees and Outward angle of -38.1864. Enc MJD is 55036.6951, and Cl. App is 6.726M<br>
 
My current solution is Inc Angle of 110.99 degrees and Outward angle of -38.1864. Enc MJD is 55036.6951, and Cl. App is 6.726M<br>
 
Your Mileage may vary.
 
Your Mileage may vary.
 
[[Image:Lcrtgt2.jpg|frame|left|Transx Stage 2]][[Image:Lcrtgt3.jpg|frame|right|Transx stage 3]]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  Once a solution has been reached, click '''BCK''' twice on the Right MFD.  
 
  Once a solution has been reached, click '''BCK''' twice on the Right MFD.  
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  closer to the moon.
 
  closer to the moon.
  
== See also ==
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== [[LRO_part_2]] ==
*[[Lunar Reconnaissance Orbiter]]
 
*[[Lunar Reconnaissance Orbiter part 2]]
 
 
 
[[Category:Articles]]
 
[[Category:Orbiter 2010 add-ons]]
 
[[Category:Spacecraft add-ons]]
 
[[Category:Add-ons by BrianJ]]
 
[[Category:Tutorials]]
 

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