LM EPS ANALYSIS GROUND RULES AND ASSUMPTIONS 1. The descent stage batteries go on the line 30 minutes prior to earth liftoff. 2. A 3.8 hour checkout was assumed for lunar orbit. 3. Ascent and descent batteries were paralleled for the powered descent burn and prior to liftoff from the lunar surface. 4. The S-band equipment was assumed on 100 percent from initial activation in lunar orbit until completion of the mission. 5. The rendezvous radar electronics was assumed to be operational for the period of time dictated by the current G Mission fl ight plan. 6. The primary navigation and guidance subsystem (PGNCS) was left in the operate mode for the entire lunar stay. 7. The forward window heaters were left off for the entire mission. 5 - 34