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Jerry Carr (CAPCOM)
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Roger. Frank, I would like to talk to you for a minute or two about the AUTO OPTICS funnies that you have been seeing throughout the mission. Over.
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Jerry Carr (CAPCOM)
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Roger. The problems you have run into so far are due to some unknown source, probably EMI or the like loading your CMC trunnion cell which is now 91, so it doesn't really represent your true trunnion angle. Now this loading problem we don't feel implies any decrease in the reliability in your CMC at all. We think that the best way to circumvent the problem is to cycle the OPTICS ZERO switch first to OFF and then ON prior to using the optics for any purpose. And with that procedure, I think you probably won't have any more problems. Over.
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Jim Lovell (CMP)
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Roger, Jerry. Understand. I do notice one difference. We did preferred REFSMMAT's. The first we had trouble with; the last one worked out as expected. I noticed for the first one that when the option came up, it was for nominal option, whereas for the very same procedure for this last REFSMMAT change, we got … preferred REFSMMAT option. …
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Jerry Carr (CAPCOM)
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Apollo 8, this is Houston with a comeback on your entry navigation calculations. Over.
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Jerry Carr (CAPCOM)
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Roger. We went through the charts and got exactly the same answer as you got. Looks like your procedure is very good; looks like it was real good head. You remembered to average out the velocity. We also went ahead and computed the problem to verify the chart and got a good solution. Over.
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Jerry Carr (CAPCOM)
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Roger. On your question about the option: PROGRAM 40 sets the preferred flag such that the next P52 will come up option 1, subsequent alignments after that come up option 2. Over.
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Jim Lovell (CMP)
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Roger. Understand. So 40 will have to come up with a TIG burn with an option 1 for us.
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Jerry Carr (CAPCOM)
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Roger. Now concerning your restart that happened in lunar orbit, for the peace of mind of the computer people and the MIT folks, we have a question. Did VERB 34 ENTER to a flashing VERB 51 in P22 cause your restart? Over.
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Jerry Carr (CAPCOM)
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Apollo 8, this is Houston. It is about time for us to start keeping track of some command module RCS temperatures; so when you get a chance, we'd like the reading now, and we'll try to repeat it about every 8 hours or so.
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Jerry Carr (CAPCOM)
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Apollo 8, Houston. Roger. Understand. 5C and 5D are pegged high; 6A and 6D are pegged high; 6 Charlie is 5 volts; and 6 Delta pegged high. Over.
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Jerry Carr (CAPCOM)
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Apollo 8, Houston. We're showing quad A running a little bit warmer than the other quads. If you remember, I mentioned before that we were coming into a period of time here where we were going to spend a lot of time with no PTC going. We'd like for you to try to favor quad A if you can in the shade, and do whatever you can to keep that temperature from getting out of hand. Over.
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Jerry Carr (CAPCOM)
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Roger, Frank. We are more interested in the tank temperatures than the quad temperatures. Over.
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Frank Borman (CDR)
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Roger. I understand. Now listen, if you think it is that important, we'll just keep PTC-ing it and not even do anything.
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Jerry Carr (CAPCOM)
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Negative. There's no sweat right now. We're watching it, and we just wanted to let you know that this thing is being looked at. If we get anywhere near a situation where we feel we ought to change, we'll go back to PTC or cool it.
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Frank Borman (CDR)
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Okay. Thank you. We'll do our best, but it is kind of hard, though. You are sort of subject of spatial geometry: wherever the stars and the moon happens to be, that's where you point.
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Jerry Carr (CAPCOM)
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Roger. We understand. We're going to keep an eye on it down here, and we'll keep you appraised.
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Jerry Carr (CAPCOM)
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Roger. Pass the word to Jim that on these marks that are coming up, pretty important that he remember to record his DELTA-R and DELTA-V and trunnion. We are working low bit rate down here, and so we're not going to be able to record that data from here. Over.
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Frank Borman (CDR)
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Houston, Apollo 8. Did you read that we are recording all the DELTA-R and DELTA-V and trunnion …
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Jerry Carr (CAPCOM)
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Roger. We understand, but tank temperature is holding steady, so we are all right.
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Jerry Carr (CAPCOM)
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Roger, Frank. The helium tank temperature that we are watching on quad A has only gone up 1 degree in all this work that you are doing, so we don't consider it to be too terribly serious. What we would like to do, as soon as you finish this P23 work, is rather than go back into PTC, let's just roll her over 180 degrees and put quad A on the cool side, and hold it that way until your next activity comes up, which is around 102:30. Over.
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Frank Borman (CDR)
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Okay, Jerry. We're through with PROGRAM 23. We're just going to roll here to get the sun off quad A, if that's what you want.
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Jerry Carr (CAPCOM)
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Roger, Frank. So far we haven't seen the temperature start back down again. We expect to see it, though.
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Frank Borman (CDR)
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Roger. Give us the word if you want us to maneuver back here before that time that you …, please.
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Jerry Carr (CAPCOM)
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Roger, Frank. We have some data that was missed on your P23. We'd like you to read it down to us if you have time.
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Frank Borman (CDR)
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Sixth mark, that's—did Lovell tell you to do this? Come on, Carr; come clean. Did he ask you to ask for this?
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Jerry Carr (CAPCOM)
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Roger. All zeros, all zeros. Okay. On star number 7, we missed the trunnion on marks 1, 2, and 3.
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Jerry Carr (CAPCOM)
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Okay, Frank. And then the last one is on star number 1; we missed the trunnion on mark 5.
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Jim Lovell (CMP)
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Find out from the Guidance group if a midcourse maneuver of minus 4.8 to access corridor at 14 hours would be better than the 15.2 I came up with first.
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Jerry Carr (CAPCOM)
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We have already started checking it, Jim. I bet you think you sneaked that P37 past us.
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Jerry Carr (CAPCOM)
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Roger. Frank, we are going to establish a range sequence now. We would like to keep silence on the net for about 3 minutes. Over.
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Jerry Carr (CAPCOM)
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Roger. This range sequence is a phenomenon we get on down-voice backup; in this mode, the ranging and the voice share the same channels, so we have to periodically check and make sure that they are not interfering with each other. Over.
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Jerry Carr (CAPCOM)
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Roger, Frank. We would like for you to go back into PTC now. Your helium tank temperature is still holding about the same. And we are going to try PTC to even things out. Over.
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Jerry Carr (CAPCOM)
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Roger, Frank. Let him know that we've compared his latest P37, and the state vectors have converged to—they are very, very close now.
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Frank Borman (CDR)
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You guys are going to make it impossible to live with him. It always was pretty hard.
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Frank Borman (CDR)
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Hello Michael, we lost lock and Bill hit COMMAND RESET to get the lock back on again, but you're welcome to the antenna.
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Mike Collins (CAPCOM)
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Apollo 8, Houston. You've got a lot of background noise and about unreadable. We're trying to get a better OMNI.
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Mike Collins (CAPCOM)
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I got a message for you while you were asleep. Valerie said to tell you that she and the kids are leaving for church about 11:30 and eagerly awaiting your return. She said presents are magically starting to appear under the Christmas tree again so it looks like a double barrel Christmas. Over.
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Mike Collins (CAPCOM)
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Early and busy as usual. I told Michael you guys are up there, and he said who's driving?
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Bill Anders (LMP)
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That's a good question. I think Isaac Newton is doing most of the driving right now.
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Bill Anders (LMP)
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I think Isaac Newton is doing most of the driving right now.
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Bill Anders (LMP)
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Tell Valerie and the kids a Merry Christmas for me, Mike, and tell them I'll see them there in a while.
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Mike Collins (CAPCOM)
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I sure will, and you might tell Frank if he's got any messages his people are about 10 feet away.
Spoken on Dec. 25, 1968, 3:51 p.m. UTC (55 years, 9 months ago). Link to this transcript range is: Tweet
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