Spacelog Apollo 8

Just barely make out Clear Lake.

Your nozzle temperatures have dropped from about 94 to around 66.

Okay. I'm showing just a little bit above 50 percent here, and we'll keep on going, and if it looks too cold, give us a call.

Okay. We'll do that.

Houston, we had a momentary O₂ high flow, but we think it's due to all the purging of the water lines we're doing here in the cabin.

Apollo 8, Houston. We show you down to 25 percent of your waste water.

Okay. I'm just about 28, Houston. Stand by just a bit.

Okay. Waste dump stopped and then purge again.

Understand. Roger. Waste dump stopped.

Houston, we're on a high gain, and it might be a good time to try your COMM check.

Apollo 8, we're going to go ahead and crank up to a COMM test now, and we will be a little bit late on your update for 12 hours.

Okay.

Do you still want our—have us command as much as we can on the ground, or would you like to move the switches yourself?

Oh, you can have the fun of doing it.

Sounds like you're dragging there.

… you suggest a … We're using 1/250 on at f:11 on CEX and CMAX for earth shots. Do you verify? Over.

Okay. You got going before I got my pencil up. How about saying it again?

f:11 and 1/250 for CEX 16mm and C 70mm.

Okay. Thank you.

How about running in by the back room boys. My light meter doesn't seem to be helping out too much.

Okay.

Okay, Apollo 8. We're starting in—setting up for our first COMM test. This is going to be an uplink voice, ranging, and full downlink, which is not anything really different than what you have on board. I would like for you to verify that the S-band NORMAL MODE VOICE switch is in VOICE.

Roger. VOICE.

Okay. And the up-telemetry DATA to DATA.

Roger. DATA.

Up-telemetry COMMAND in NORMAL.

Roger. NORMAL.

High-gain antenna to AUTO TRACK.

Correction. That's -

AUTO.

We're in AUTO WIDE BEAM, and you can go ahead and dump the tape.

Okay. I'd like for you to go to NARROW BEAM.

Okay. Going to NARROW BEAM now.

Roger.

And I'll give you a call when we get ready to work on the tape.

Okay. We're still in PTC, so you're only going to have it for about 10 or 15 minutes.

Okay. We've had some problems with our displays, and I think they're straightened out now, but you may have to keep us advised if we run out of limits in case we display again.

Roger.

Say, while we're standing by here, Apollo 8, the service module quantities that we had listed—we're going to try to update them, if you want to call out your quantities. Have you checked them with your charts?

Negative. I haven't gotten around to that. Stand by.

Okay. There's no hurry on that. Just wondered if you had done it; we will check it against what we've got on our norma-gram.

I'm showing a SPS helium pressure, about 3570, indicated on board.

Roger.

And fuel LOX tank pressures are 177 and 176, respectively.

Okay.

N₂ A is 2400, B 2500.

Okay.

This PTC attitude really isn't the greatest for taking pictures of the earth.

Roger.

Or of the moon.

Apollo 8, kinda stand by for a burst of noise as we change configurations on the ground. We're going into test 1; You'll still have up and downlink, and we'll be in this mode for 2 minutes, but you may hear some burst of noise as we change.

Roger.

Okay, Apollo 8. We're in the middle of our first test, and how about giving me a voice check.

Roger, Houston. This is Apollo 8. One, two, three, four, five, five, four, three, two, one. Apollo 8, out.

Roger. And read you loud and clear. This COMM is unbelievably good.

Good.

Okay, Apollo 8. We've finished the first test, and we're now going to change the uplink mode to UPLINK COMMAND AND RANGING, and we'll be going without upvoice. We'll be in this mode for 2-1/2 minutes and will be sending a test messages. It'll have no effect on either your computer or your panel switch configuration. What you might see will be the S-band noise that's associated with the break lock. However, you should still have a good signal on your power meter. This is not a loss of signal, but rather just a loss of the voice modulation, and I'll do you a mark just before we do that so that you can turn your S-band volume down if you so desire, and we'll be back up in this mode that we're in now in 2-1/2 minutes.

Roger.

Apollo 8, Houston. Voice check.

Read you five-by, Houston.

Apollo 8, Houston.

Roger, Houston. Read you loud and clear and am with you. Completed our second test.

Okay.

Okay. Our next test will be a test of the uplink voice and ranging with downlink voice and ranging and on low bit rate, so we'll be changing bit rate on you, and we'll be making a voice check in the middle.

Okay. You've about had it on the high gain. You might try to get it in, but it's going to hit the scan limit at any second.

Okay, Apollo 8. Looks like we'll get our information before we lose the high gain.

Okay. We'll just leave it go.

Roger.

They got the scan limit. We'll let it go, Houston, until it breaks lock.

Okay, Apollo 8. Go ahead and switch to the OMNI.

How're you doing with your test?

Okay. We've got three-fifths of the test. We'll have to pick up the rest next time we get a look at high gain.

Houston, Apollo 8.

Go ahead, Apollo 8.

Roger. Reading on P21 at 269 10 indicates a parallel of about 67.4 miles. I guess we can carry her.

You guys are getting pretty good.

That's a lot better than our first answer.

Houston, Apollo 8.

Go ahead, Apollo 8.

Roger. I'd like to ask a question about this TLI plus 11 maneuver that we copied. In the remarks, you put P37, DELTA-V 7900. Is this the DELTA-V that we would use with P37?

Okay. That's the option that you use with minimum time.

Roger. What I'd like to do is check on our P37 with your TLI maneuver update.

Okay, Apollo 8. We'd like to make sure that we don't have a misunderstanding that this 7900 feet per second is the DELTA-V. It's not associated with the high speed per feet work around procedure. This is just a standard P37 DELTA-V.

Roger. But was that the DELTA-V that you used to give us the TLI plus 11? Okay.

Okay. That's not the one that the maneuver PAD was based on. That's the number you put in for the minimum time.

Roger. Understand.

Okay. Sounds like a good idea if you want to go ahead and check out the 37. And we're standing by to work on COMM as soon as that high gain is available.

Okay. Houston, you got the high gain.

Houston, do you read? Apollo 8. Over.

Apollo 8, Houston.

Roger. High gain yours.

Okay. And if you're ready, we are. We'll go right ahead with our COMM checks.