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AMS.ZIP
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32.CMT
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1989-03-24
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2KB
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*** BEGIN TUTORIAL # 3-2 ***
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Tutorial # 3-2 covers the transfer orbit burn and the plane change maneuver
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The LV is at an altitude of about 20km in a circular orbit
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The LV is just north of the equator, moving south at about 1m/s
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The LV is about 13.7° east of the OL, gaining about 0.01° every 2s or 1°/3min
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The LV is nearing the lunar equatorial plane
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The southward velocity is about 1m/s, so a plane change burn is not necessary
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The LV is about to cross the lunar equatorial plane and the terminator
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*** WATCH the map display as the LV crosses the terminator at UT 11:58:00
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The LV is 13° east of the OL .. the transfer orbit occurs at 9.2° east
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At 1°/3min, the burn will occur at UT 11:58:15 + (13-9.2)x3 = UT 12:09:40
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The LV is pitched to the proper orientation for the transfer orbit burn
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Pitch program start
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Pitch program complete
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The transfer orbit burn starts when the LM is 9.2° east of the OL
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..at about MET 25:50:00
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Four minutes to ignition
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The LV is 10.3° east of the OL
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Three minutes to ignition
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The LV is 10.0° east of the OL
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Two minutes to ignition
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The LV is 9.65° east of the OL
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One minute to ignition
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A small pitch angle adjustment is made to properly align the LV
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*** MAIN ENGINE ON ***
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*** MAIN ENGINE OFF ***
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The initial orbit is 20.9x124.6km
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The RCS up thruster raises the apolune to 150km
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Transfer orbit burn complete
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The new orbit is 20.9x148.1km
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The LV is 8.4° east of the OL and beginning to climb toward it
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This concludes TUTORIAL # 3-2 .. the mission continues with TUTORIAL # 3-3
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