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- ****** BEGIN *** TUTORIAL *** # 1 - 4 ******
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- Tutorial # 1-4 covers Powered Descent Initiation (PDI)
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- ..through landing on the Moon.
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- The LM is 28.7° east of the landing site at an altitude of 20.4 km
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- ..falling at 8 m/s and moving westward at 1689 m/s.
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- Three minutes to PDI.
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- The LM is 0.07° south of the landing site moving north at 8 m/s.
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- The LM orbit is 19.4 by 99.4 km.
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- Two minutes to PDI.
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- A one degree ROLL is performed to properly orient the LM
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- ..so the Left-to-South angle is zero.
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- One minute to PDI.
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- The LM is at an altitude of 19.5 km falling at 3 m/s
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- ..and moving westward at 1690 m/s.
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- The RCS throttle is set to HIGH.
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- The AUTOPILOT is turned on at 18° (540 km) east of the landing site.
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- *** POWERED DESCENT INITIATION ***
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- The Descent Autopilot first increases the Descent Engine throttle to FULL.
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- After reaching full throttle, the Autopilot adjusts both the pitch angle
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- ..and Descent Engine throttle to bring the LM to the landing site
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- ..using a minimum amount of propellant.
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- About 2 min 30 s after PDI
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- ..the Autopilot begins to decrease the Descent Engine throttle.
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- The LM is at an altitude of 17.5 km and falling at 27 m/s.
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- The westward velocity is 1230 m/s.
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- The LM is 9.3° (280 km) east of the landing site.
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- The RCS LEFT and/or RIGHT thrusters are used as required
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- ..to adjust the north/south position and velocity.
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- The RCS LEFT thruster slows the northward LM velocity.
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- The RCS is used during Powered Descent
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- ..to keep the north/south velocity component below 1 m/s or so.
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- The Landing Radar is turned on at an altitude of 12,000 m.
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- The Landing Radar is on.
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- It operates reliably when the altitude is below 9000 m.
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- The LM is at an altitude of 10.6 km and falling at 45 m/s.
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- The westward velocity is 735 m/s.
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- The LM is 3.8° (115 km) east of the landing site.
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- The LM is at an altitude of 7.9 km and falling at 43 m/s.
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- The westward velocity is 580 m/s.
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- The LM is 2.5° (75 km) east of the landing site.
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- The Descent Engine propellant supply is 44%.
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- The Deep Space Network transponder (DSN) is turned off at 6000 m.
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- The DSN transponder is off.
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- The LM is at an altitude of 5.2 km and falling at 37 m/s.
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- The westward velocity is 435 m/s.
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- The LM is 1.5° (45 km) east of the landing site.
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- The Descent Engine propellant supply is 38%.
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- The LM is at an altitude of 2500 m and is falling at 28 m/s.
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- The westward velocity is 275 m/s.
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- The LM is 0.6° (19 km) east of the landing site.
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- The Descent Engine propellant supply is 31%.
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- Manual control resumes when the LM altitude falls below 1000 m.
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- Manual control should NOT be assumed during a pitch maneuver.
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- The INS displays the landing site distance in meters.
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- The LM is under manual control.
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- The Descent Engine throttle increases to slow the rate of descent.
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- Down at 6 m/s.
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- The Landing Radar displays a Level 2 map.
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- Down at 3 m/s.
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- The LM is 1100 m east of the landing site.
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- The LM is pitched forward to slow the eastward deceleration.
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- Altitude is 350 m.
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- The LM is pitched upright.
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- Further horizontal velocity corrections use the RCS thrusters.
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- The RCS throttle is set to MEDIUM.
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- Down at 4 m/s.
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- Altitude less than 200 m ... The velocity indicators are active.
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- Altitude is 100 m.
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- Down at 2 m/s.
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- Descent Propellant 13%.
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- LM altitude less than 10 m.
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- *** !!! CONTACT !!! ***
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- The LM landed 659 m east and 49 m south of the goal.
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- The landing score was 81, for a total score so far of 16.
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- This concludes TUTORIAL # 1-4 ... The mission continues with TUTORIAL # 2-1.
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