Spacelog Apollo 8

Roger. Thank you.

Apollo 8, Houston.

Go ahead, Houston. Apollo 8.

Okay, Apollo 8. I'd like to fill you in on things we're thinking about doing in the next couple of hours, first chance you get there.

Go ahead.

Okay. In relationship to the midcourse correction, we'd like to put that one off until about 11 hours, and it will be approximately a 25-foot-per-second burn. The reason we're delaying the burn time is to allow for better tracking as a result of the 7-1/2-foot per second you put in on the separation. We'd like to take a little more time to look at the tracking data. And the dispersions in your correction aren't going to be growing very fast here. What we'll do then is to delete the NAV sightings that occur about 09 plus 10 in the flight plan, and this will be getting us back on to the normal flight plan sequence. So we'll go ahead and finish the P23, and the 7-hour limit on that P23 is due to the range limits on this test. Over.

Is due to the what did you say?

The 7 hours on the P23 problem is due to the fact that we want to get these sightings in at a certain range. Over.

Roger. Understand.

If you have any comments on that proposal, why, go ahead and pass them down, and we'll feed them in.

No, I think that's fine. We need to get out of the suits and get something to eat here too.

Roger. Looks like we'll be back on the flight plan by 11 hours. We'll be holding up on the updates and PAD's because of the later burn.

Houston, Apollo 8.

Go ahead, Apollo 8.

Roger. I believe we have the S-IVB in sight. It would appear to be tumbling, and every once in a while, we are getting very bright reflections from it off the star, off the sun.

Houston, 8. Are you getting the data from the P23?

Stand by one.

Affirmative, Apollo 8.

Apollo 8, Houston.

Go ahead, Houston. Apollo 8.

Roger. We're copying your P23 progress. FAO advises that it looks like you are finishing your first star, and we'll need one more set on the second star, and this 7-hour cut-off isn't that firm, so we would like for you to go ahead and complete the second star if you can.

We're on the last setting of the second star right now.

Okay. Real fine. And we've got a—it's about time for a cryo fan cycle.

Okay. We'll do them one at the time for about 4 minutes on each of them.

Roger.

We've got the cryo fan on in H₂ tank number 1.

Roger, Bill.

Houston, Apollo 8. We've just got finished taking two sets, six sightings on Sirius, and one set on Procyon.

Roger. I understand that's six on Sirius and one on Procyon.

Two sets on Sirius, one set on Procyon.

Roger.

And we're maneuvering now to PTC attitude.

Oh. Roger, Apollo 8.

Apollo 8, when you get a chance down in the lower equipment bay, it looks like you're using the floodlights in the dim 2 position, and that one is a time-limited item. We would like for you to do your standard running in the dim 1 position. Over.

Roger. Just turned them off.

Okay. Anytime you have them on, running dim 1 position is preferred to the LEB.

Thank you.

Houston. We have the cryo fan on—the number 1 H₂ tank was on at 07:01. You can give us a hack when you want it—when you're ready for it to be turned off.

Wilco.

Okay, Apollo 8. You can terminate that one and go to the other tank.

Roger.

Okay. O₂ gage number 2 is on.

Roger.

Houston, Apollo 8.

Go ahead.

Are you having any problem on the ground with your COMM?

Negative. You're coming in loud and clear.

Okay. Houston, Apollo 8. We've initiated the PTC.

Roger.

Okay. Apollo 8, you can terminate the fans in the hydrogen, and we're ready to start on the oxygen tanks.

Apollo 8, we are through with the dump; you can have the tape recorder back.

Apollo 8, Houston. We are ready to go to the second O₂ tank.

Okay.

And for your information, it's Cleveland 24 to 10, and what we plan to do —

Say again.

That's Cleveland 24 to 10, not over yet.

Okay, Apollo 8. Looks like you can terminate your cryo fans now, and we're going to leave you alone for a while and let you get caught up. Things we have onboard, the high-gain antenna check, COMM mode check that you have listed at 7 hours, we'll put off and do whenever you are ready for it. So that's at your convenience. During the high-gain dump that we performed using a wide band, we were still getting real good data at 36K, which is a little bit further than circuit margins that were predicted for you. And we've got our SPS burn coming up somewhere around 11 hours, and we'll give you more information on that later.

Roger. We're doing the PROGRAM 21 now, determining ground track for LOI that we did not make at 5 hours.

Houston, Apollo 8.

Go ahead, Apollo 8.

Okay. We just broke lock on S-band high-gain. We're on OMNI B now.

Roger. OMNI B.

Apollo 8, Is that Bravo or Delta?

Dog, Delta.

Roger.

We can't get the PROGRAM 21 to integrate up to LOI; just stalled out around 69 hours and 2 minutes.

Roger. They are watching it.

Houston, Apollo 8.

Go ahead, Apollo 8.

Roger. Do you want us to stop the integration via VERB 96? Over.

That is affirmative; VERB 96.

Houston, this is Apollo 8.

Apollo 8, Houston.

Go ahead, Apollo 8.

Roger. Do you want us to hold off on this P52 realignment, also?

Yes, that is affirmative, CAP COM. We want to do that a couple of hours when it is related to the maneuver, midcourse.

That is affirmative, Apollo 8. Let's time the maneuver and we will hold off and do that all in normal premaneuver sequence. And—We have got a score here—in the fourth quarter, 31 to 13. And I've got some words on your P21 discrepancy any time you are interested. And I'd like to confirm —

Go ahead.

Okay. Before I get off on that one, I'd like to confirm that you used the VERB 37 procedure to go to P00.

Roger.

Okay. On P21, the thinking runs that you had a slight error in your state vector at the time you started, and when that was integrated out, it intercepted the lunar surface where it locked up and this is contained in a fairly recent program note.

Okay. Now, we've closed the—the waste vent, so we should see this O₂ come down now.

Okay. Understand you closed the waste vent, and how about the lithium change? Have you done that one?

Roger. That's done.

Okay. Thank you.

EECOM, FLIGHT. Did you copy that?

This conference communication is great. We won't have to have any debriefing.

(Laughter) That's pretty outstanding.

Right.

Houston, Apollo 8.