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Ken Mattingly (CAPCOM)
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One thing you might be interested in: we listened to that low speed information that you taped on the first couple of REV's that we thought was going to be unusable. And it must have been a ground problem because it's coming in loud and clear now.
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Bill Anders (LMP)
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Hey, that's great. I was just writing a long dissertation on why we have problems and can't use that DSE in low bit rate. So that's real good.
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Bill Anders (LMP)
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Okay. If they could hold off here for a couple of hours, if they have anything at all, just tell them I'm alive, why, I'll give my real good going over here when I get done. I might even make a statement to the world that I haven't noticed that their little amplifiers had gotten hot.
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Ken Mattingly (CAPCOM)
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Well, we're on low bit rate right now, so it'll be a few minutes before we get a chance to take another look at it. We'll let you know if you get sick.
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Ken Mattingly (CAPCOM)
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Hello, Apollo 8. We interrupt this program of music to bring you the late evening status report.
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Ken Mattingly (CAPCOM)
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Okay. We are getting ready to have a shift turnover, and I wanted to go over a few items before I do. On the midcourse correction number 6: right now, that looks like it is at most 0.3 a foot per second, so there will be no burn for midcourse number 6. Midcourse number 7 is a little larger, and we'll make a decision on that later. Your weather in landing site still reported as being good and the forecast to be about 2000 scattered and 12 000 broken, about the same numbers they gave Frank earlier. Visibility will be about 10 miles, wave height about 4 feet. And I guess there is some scattered thundershowers, like less than 5 percent, that you should worry about. And they're 10 to 30 percent maybe at 2000, broken as opposed to scattered; so it looks pretty fair. We have got a —
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Ken Mattingly (CAPCOM)
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Roger. Got a couple of flight plan things to consider. Now number 1 at 119:30: we have got a P52 IMU realignment which we need to slip in ahead of the P23 sightings, and that will be an option 3 REFSMMAT.
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Ken Mattingly (CAPCOM)
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Okay. Some of the folks in sitting back and looking at the TV business have some ideas about things they would like to see tried with the filters. And I would like to read you what they have here and let you think about it; and in the next 10 hours, you can decide whether or not you think it is worth the effort. Basically, they would like to try using a whole different series of filters —
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Ken Mattingly (CAPCOM)
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Okay. Before you copy, let me read it all through to you here so you will get the feel for what it is we are talking about. The title of this little epistle is “TV and Film Photography Correlation Experiment,” and what they want to do is mount the TV camera with the telephoto lens on a bracket. in the rendezvous window and take a TV picture of the earth through the red and blue filters, 1 minute per filter; that means red and blue filters individually. Then they would like to take a TV picture of the earth through through the red, in this case, the 25 Alfa filter combined with the polarizing filter. Rotate the polarizing filter through 360-degree increments, again 1 minute per position. Then they'd like to take a TV picture of the moon with the polarizing filter at 360-degree moon-rotation increments and again, 1 minute per position. And to go with this, we would like to have Hasselblad pictures.
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Bill Anders (LMP)
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Are those—when you were talking about pictures through the polarizing filter, is that the TV pictures through the polarizing filter?
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Bill Anders (LMP)
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Okay. Now the only thing—the only problem here is it's darn near impossible to aim that television camera; the field of view is so narrow that it took three men and a boy up here to get the thing pointed in the right direction. And we tried using chewing gum for a sight and everything else, and let me tell you that the odds of getting that thing in the earth is pretty small.
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Ken Mattingly (CAPCOM)
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Okay. I think we weren't too clever in our ground callup as to how to point the spacecraft. For one thing I think we can do that a lot better next time now that we have stumbled through it once. I agree with you —
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Bill Anders (LMP)
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It's not the spacecraft; it's not the spacecraft that's hard to point, it's the camera. The bracket has sufficient slump in it that it can take the camera out of field of view when configured through the window. And it took a lot of microadjustments with a lot of coaching from the ground to get the thing in, and it was a real tough job. So I think you ought to take all this in mind; if you could possibly use the wide angle, you might be better off.
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Ken Mattingly (CAPCOM)
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Okay. I understand what you are saying now. I'll run that back by the TV guys and see what they have to say about that. In conjunction with the above, they wanted to take some Hasselblad pictures of the earth through the rendezvous window with the red and blue filter and black and white film, and then again through the polarizing filter, and this is all going to be used in order to try and correlate the TV and the regular film photography. So if you think it is a worthwhile thing, and you would like to give it a try, I'll run this by Jack and the TV cats and see if they would like to get something out of it with the wide angle, and we can talk about it a little later.
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Bill Anders (LMP)
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Okay. Another thing to keep in mind is that we haven't seen the moon—we didn't see all the way out, and we rarely see it going back. We have seen it once since we left, but we have maneuvered the wrong way from a sighting attitude to the shortest way to PTC and to go from an earth view to a lunar view will take quite a bit of time and some RCS. So you might keep that in mind, too.
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Ken Mattingly (CAPCOM)
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Okay. I just wanted you to be aware of this and think about it and what its implications to the flight plan might be, and I'll run this wide angle and comment about the moon back by and see which sections they think would be most appropriate. Okay. On the EMS scroll, Frank wanted us to verify the order that he could expect to see the entry profile, and the first profile that comes up is labelled “Nonexit Number 2” and that is the short-range high-speed entry. The second thing that will come up is entitled “The 3500 Mile” which is also high-speed entry, but it is the one you would use in event we go to the longer entry ranges. Then the third profile will be “Nonexit Entry Number 1,” and it will be followed by a forth 3500 mile. So you have four entry profiles. Numbers 1 and 3, as you come to them, are the short ranges, and numbers 2 and 4 are the long-range scrolls. On coldsoak, I think we talked about what we're going to do there, but somewhere inside of about an hour, we'll want to get into the coldsoak business. We certainly don't want to do it at 12. Talking to the trajectory people—what they thought about water boiling—something to keep in mind is the fact that they do see your water dumps and water boiling on your trajectory plot. It seems to be that it's a function of their computational scheme rather than a function of the fact that the trajectory is being perturbed that much. So it looks like one time that we're going to consider, if we're going to do some of this water boiling, we may do it just prior to the midcourse after all the tracking is settled down and they know what the midcourse correction will be. Then in that period just prior to the midcourse we can do it, and they'll pick up their tracking again following the midcourse correction. So if someone proposes that the — It is probably nice to know that we are not throwing away our data at the most important time, that it is a function of the computer program rather than so much a function of your trajectory being changed.
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Bill Anders (LMP)
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Let me ask you one thing then. Do you want a coldsoak sometime prior to the midcourse correction for 1 hour. Is that what you're trying to tell me?
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Ken Mattingly (CAPCOM)
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Not really. I think we are looking at that prior to the midcourse correction as being the time when we would like to check out the water boilers. The coldsoak does involve some water boiler, too, but that's going to be done right before entry when these things are not going to be very sensitive, and if we don't do it in 12 hours, it is not real clear where the coldsoak takes place or where you turn on the secondary water boiler. In looking through the entry checklist tonight, we didn't find a place for that.
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Bill Anders (LMP)
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Okay. Is it really clear that you need the cold soak? We kind of figured on sometime prior to SEP bringing up the secondary EVAP, and also having the primary at that point sometime prior to that date on your suggestion.
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Ken Mattingly (CAPCOM)
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Okay. We're talking about doing that like an hour prior to SEP; but in the pre-SEP check, one of the things we power down was the secondary loop. And they won't need to turn it back.
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Ken Mattingly (CAPCOM)
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Right. We're doing that to keep our power profile where we want it. And then we're going to be turning it back on sometime prior to entry. And the time to turn it on in entry, of course, isn't specified because as you turn it on, the voltages show that they can hack it.
Spoken on Dec. 26, 1968, 11:13 a.m. UTC (55 years, 10 months ago). Link to this transcript range is: Tweet
