Re: Apollo 11 - 50 years on.
024:48:04 The attitude angles that the onboard computer came up with to aim the fixed line of sight at the substellar point on Earth's horizon, also happened to hide Alpheratz behind the LM, which perhaps says a litle about the lack of sophistication of the CMC's software. It is worth noting that with the objectives of the optics being mounted on the upper part of the CM's conical surface, the LM actually obscures a substantial amount of their field of view. (AFJ Commentary)
025:07:05 Strictly speaking, it is the difference in pressure between the tunnel and the CM cabin. However, since a valve in the LM's overhead hatch has been deliberately left open, the reading will reflect the pressure in the LM cabin also. Note that the pressure gauge that Mike is reading is only connected across either side of the forward hatch when the Tunnel Vent Valve is in its "LM/CM Delta-P" position. If the valve is in any other position, then the gauge reading is meaningless. (AFJ Commentary)
025:07:05 In Mission Control, the backup commander of Apollo 11, Jim Lovell, has temporarily taken the CapCom position.] (AFJ Commentary)
025:43:56 Verb 59 means 'Please calibrate'. (AFJ Commentary)
025:48:24 When water is dumped from the spacecraft, it has a tiny propulsive effect that affects the spacecraft's trajectory. Mission Control want the dump to go ahead soon so that radio tracking after the burn will be inclusive of the dump's effects. MCC number 2 in the Flight Plan will in fact be the first Midcourse Correction actually carried out, because MCC-1 was deemed unnecessary and was cancelled. (AFJ Commentary)
024:48:04 The attitude angles that the onboard computer came up with to aim the fixed line of sight at the substellar point on Earth's horizon, also happened to hide Alpheratz behind the LM, which perhaps says a litle about the lack of sophistication of the CMC's software. It is worth noting that with the objectives of the optics being mounted on the upper part of the CM's conical surface, the LM actually obscures a substantial amount of their field of view. (AFJ Commentary)
025:07:05 Strictly speaking, it is the difference in pressure between the tunnel and the CM cabin. However, since a valve in the LM's overhead hatch has been deliberately left open, the reading will reflect the pressure in the LM cabin also. Note that the pressure gauge that Mike is reading is only connected across either side of the forward hatch when the Tunnel Vent Valve is in its "LM/CM Delta-P" position. If the valve is in any other position, then the gauge reading is meaningless. (AFJ Commentary)
025:07:05 In Mission Control, the backup commander of Apollo 11, Jim Lovell, has temporarily taken the CapCom position.] (AFJ Commentary)
025:43:56 Verb 59 means 'Please calibrate'. (AFJ Commentary)
025:48:24 When water is dumped from the spacecraft, it has a tiny propulsive effect that affects the spacecraft's trajectory. Mission Control want the dump to go ahead soon so that radio tracking after the burn will be inclusive of the dump's effects. MCC number 2 in the Flight Plan will in fact be the first Midcourse Correction actually carried out, because MCC-1 was deemed unnecessary and was cancelled. (AFJ Commentary)
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