Editing Lunar Reconnaissance Orbiter (BrianJ add-on)
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== Overview == | == Overview == | ||
− | The Lunar Reconnaissance Orbiter (LRO) is the first mission in NASA's planned return to the moon. LRO | + | The Lunar Reconnaissance Orbiter (LRO) is the first mission in NASA's planned return to the moon. LRO will launch Feb. 27, 2009, with the objectives to finding safe landing sites, locate potential resources, characterize the radiation environment and test new technology. |
The return to the moon will enable the pursuit of scientific activities that address our fundamental questions about the history of Earth, the solar system and the universe -- and about our place in them. It will allow us to test technologies, systems, flight operation and exploration techniques to reduce the risk and increase the productivity of future missions to Mars and beyond. It will also expand Earth's economic sphere to conduct lunar activities with benefits to life on our home planet. | The return to the moon will enable the pursuit of scientific activities that address our fundamental questions about the history of Earth, the solar system and the universe -- and about our place in them. It will allow us to test technologies, systems, flight operation and exploration techniques to reduce the risk and increase the productivity of future missions to Mars and beyond. It will also expand Earth's economic sphere to conduct lunar activities with benefits to life on our home planet. | ||
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The debris plumes are expected to be visible from Earth- and space-based telescopes 10-to-12 inches and larger. | The debris plumes are expected to be visible from Earth- and space-based telescopes 10-to-12 inches and larger. | ||
− | This is a difficult and challenging mission. Experienced orbinauts will enjoy the challenge of targeting the LCROSS to impact the | + | This is a difficult and challenging mission. Experienced orbinauts will enjoy the challenge of targeting the LCROSS to impact the south pole of the moon, when the LRO spacecraft is overhead. This mission is not recommended for people recently starting to use Orbiter. |
=== Mission Objectives === | === Mission Objectives === | ||
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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 === |
− | * [http:// | + | * [http://orbithangar.com/searchid.php?ID=2601 Atlas V heavy] V2 by Kev33 |
− | * [http:// | + | * [http://koti.mbnet.fi/jarmonik/Orbiter.html IMFD 5.1m] |
− | === | + | === optional add-ons === |
− | * [http://orbithangar.com/searchid.php?ID=3165 Attitude MFD] | + | * [http://orbithangar.com/searchid.php?ID=3165 Attitude MFD] or [http://www.orbithangar.com/searchid.php?ID=3093 UNIVPTG MFD] |
− | + | * [http://www.orbithangar.com/searchid.php?ID=2989 Telescope MFD] | |
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== Procedures == | == Procedures == | ||
Accuracy of burns in this mission is '''CRITICAL'''. | 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. | |
=== Launch === | === Launch === | ||
− | Fire up the '''01 - AV020 LRO launch | + | Fire up the '''01 - AV020 LRO launch''' scenario in the LRO scenarios folder |
This is a night launch so visibility is poor until after the TLI burn. | This is a night launch so visibility is poor until after the TLI burn. | ||
− | The scenario starts at UTC | + | The scenario starts at UTC 2/28/2009 2:07:00. |
− | Launch time is UTC | + | Launch time is UTC 2:08:07. |
− | The default camera view is Ground Observer. You have just | + | The default camera view is Ground Observer. You have just under a minute to set up the camera to your personal preference. |
− | At UTC | + | <nowiki>At UTC 2:07:57 press the</nowiki> '''p''' <nowiki>key to start the launch countdown.</nowiki> |
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At T-5 seconds, engine ignition will happen, and the hold down clamps release at T-0. | At T-5 seconds, engine ignition will happen, and the hold down clamps release at T-0. | ||
− | The Atlas V-401 | + | The Atlas V-401 booster has a launch autopilot to guide you until booster cutoff. Pressing '''p''' again will disable the autopilot, but this is '''NOT''' recommended, as the booster has no RCS control. |
− | <nowiki>10 seconds after | + | <nowiki>10 seconds after booster separation, press the</nowiki> '''p''' <nowiki>key again.</nowiki> |
− | This will ignite the | + | This will ignite the second stage Centaur engine, and engage the second state autopilot. Pressing '''p''' again will disengage the second stage autopilot, |
+ | but again, this is not recommended. While the second stage does have RCS control, the autopilot will put the vehicle in a circular 185km parking orbit. | ||
− | Shortly after | + | Shortly after second stage ignition, the fairing will be jettisoned, and the LRO/LCROSS spacecraft will be exposed. |
=== TLI === | === TLI === | ||
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Also, click the '''HUD''' button in the right ''orbit'' MFD so that your HUD is set to orbit reference Earth | Also, click the '''HUD''' button in the right ''orbit'' MFD so that your HUD is set to orbit reference Earth | ||
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==== IMFD Configuration set-up ==== | ==== IMFD Configuration set-up ==== | ||
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Click '''Set''' | Click '''Set''' | ||
Click '''Tgt''' and enter '''Moon''' | Click '''Tgt''' and enter '''Moon''' | ||
− | Click '''Nxt''' | + | Click '''Nxt''' so that the ''Tej'' parameter is highlighbted. |
− | + | Click + or - repeately until the ''dV'' parameter reaches a minimum. This should be about ''3.13k'' | |
− | + | Click '''Pg''', then '''BV''', then '''AB''' | |
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+ | Sit back and wait for the burn. You may wish to use time acceleration to get close to the burn time, but set it back to 1x acceleration once you get close. | ||
+ | ''Note for Brian: It may be possible to use an offset in IMFD to target a polar orbit in the TLI. I think AMSO does something like this. It might be worth checking out, but it may make the LCROSS targeting harder. '' | ||
+ | When the TLI burn is complete, click on the '''BV''' button to restore the main IMFD Course target intercept screen | ||
+ | '''Do not jettison LRO yet''' | ||
+ | === Lunar targeting/LRO === | ||
+ | When you reach 32M altitude above the Earth, a piece of orbital debris will puncture the fuel tank of the centaur and drain all of its fuel. It is '''critical''' that you get your targeting done for both LRO and LCROSS before this time, as once that happens, your deltaV budget is severely limited. | ||
+ | At about 21M altitude above the earth, select TransX in the Right MFD. | ||
+ | Click on the '''--''' button until the target is ''Moon'' | ||
+ | Click '''VW''' once so the View is ''Manoevre'' | ||
+ | Select TransX also in the Left MFD. | ||
+ | In the Left MFD click '''FWD''', then VW, so that the view is 'Encounter' | ||
+ | In the Right MFD click '''++''' so Manoevre mode is ''On'' | ||
+ | Click '''VAR''' 5 times so that ''Ch. Plane vel.'' is displayed | ||
+ | Click '''ADJ''' so that ''Medium'' adjustment mode is entered. | ||
+ | Click '''--''' until the ''Min Alt.'' parameter in the Left MFD is over 50k | ||
+ | Our goal here is to end up with an ''Inclination'' parameter in the left MFD as close as possible to 90 degrees, and the ''Min Alt.'' parameter as close as possible to 50k. | ||
+ | In the Right MFD click '''VAR''' 3 times so that ''Prograde Vel'' is selected. | ||
+ | Click on '''ADJ''' 3 times for ''Super'' adjustment mode. | ||
+ | Click on '''++''' or '''--''' until ''Min Alt.'' is close to 50k and ''Inclination'' is close to 90 degrees in the Left MFD. | ||
+ | Keep repeating these adjustments, using finer adjustment modes until you get as close as possible to the required parameters. Work quickly though, as the orbital debris is getting closer and we still have to target the LCROSS spacecraft. | ||
− | + | In the Right MFD click '''VW''' to get ''Target view'' | |
− | + | Use rotation mode to get the cross as close as possible to the center of the target. | |
− | + | '''Do NOT make the burn yet''' | |
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− | + | Use the planetarium view '''F9''' key to make sure you are pointed in a generally northerly direction (towards Polaris + or - 30 degrees or so) | |
− | + | If you are pointed in a southerly direction, the transx targeting will have to be re-done using '''++''' Ch. plane vel. instead of '''--''' | |
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=== Lunar targeting/LCROSS === | === Lunar targeting/LCROSS === | ||
− | + | === Mid course correction/LRO === | |
− | + | === Course correction/LCROSS === | |
− | + | === orbit insertion/LRO === | |
− | + | === LCROSS orbit correction 1 === | |
− | + | === LCROSS final moon targeting === | |
− | + | === LCROSS pole targetinjg === | |
− | + | === LCROSS LRO targeting === | |
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