Spacelog Apollo 11

Roger, 11. And we'd like you to do a waste water dump at 84 hours down to 25 percent. Over.

Roger. I understand. Waste water dump to 25 percent at 84 hours.

Roger. And, Mike, we'll have LOS in about 11 minutes at 83 44. AOS is 84 30, and prior to—or at LOS, we would like you to go—Configure the S band for high gain track to REACQ, high gain beam to NARROW, and let's try that to see if we can get an automatic REACQ at the next AOS. Over.

Good idea.

I'm in REACQ and NARROW now.

Roger.

Apollo 11, Houston. Also, that water that you got on the aft bulkhead, we—If it's not too much, we just recommend sopping it up and then throwing the sponges away in the waste stowage area. If it's too much, then we recommend using the procedure in the checklist on page F10-14. Over.

Apollo 11, Houston. Would you have Buzz make sure he gives us the OPS pressure readings before you close up? Over.

Will do.

Houston, 11. The OPS read 5750, both bottles.

Apollo 11, Houston. Over.

Houston, Apollo 11.

11, Houston. Roger. Reading you fine, and it looks like the automatic REACQ went very well just as soon as you came around the limb. We have several small items to discuss with you here just before you go to sleep. Over.

Go ahead. Over.

Okay, 11. First of all, on our LM systems checks, everything went fine. I would like to remind you, though, tomorrow you may see an ascent pressure light when you activate the MC&W. There should be no problem, however. You did note that the APS AUX tank pressure was only reading 111 psi, which is normal at this point, but below the level which will trigger your light due to the helium which has been dissolved into the propellant. Over.

Roger. Understand that. Thank you.

Roger. And next item, the supercritical helium rise rate is nominal, and you also had that question for us about your thruster activity during the P22 on the last REV. Believe we understand that now, as you reported that your pitch was in ACCEL COMMAND and your yaw and roll were in RATE COMMAND. You were firing your pitch thrusters. This will couple rates into your yaw and roll axes, and the—You were at that time holding only half a degree deadband and coupling rates into yaw and roll produced the extra firings about the yaw and roll axes. Over.

Yes. That may be true. It's very peculiar coupling, in that it waits longer than you would think and its reaction is greater than you would think. We were getting yaw rates of around four tenths of a degree per second, for example.

Roger, Mike. We did play the data back, and that's the way it looked upon analysis of the chart recordings back here. Over.

Okay. Fine.

They've also looked at the results of your landmark tracking. The marks all apparently were very good, and we've got a full page of data here relative to the altitudes of the various site locations, which I won't read up to you, but I did want to let you know that the marks apparently went very well. I also have your consumable budgets, particularly your RCS propellant quantities. They're Deltas from nominal if you should want them. Your worst quad is quad Charlie, which is 9 percent low. I'll not read up the others unless you want them. Over.

Okay. How about the O₂ fuel cell purge? You want that now?

I'll have to stand by just a moment.

Okay. And then the other one is, we're still charging battery A.

11, Houston. We would like to delay the fuel cell purge until the backside of the Moon, and you go ahead and—should terminate your battery charge at this time. Over.

Okay. Understand. I knew we had another O₂ and H₂ purge coming up in the morning; I wasn't sure whether you wanted to go through with this one or not. I'll wait until the next side and then do it.

That's fine, Buzz.

Terminate battery charging now.

That's right, and one other systems item here—in order to balance your CRYO tanks, would you get your O₂ tank 1 and your H 2 tank 2 heaters off? Over.

Okay. I have O₂ tank heater 1 off, and H₂ tank heater 2 off.

That's right, Mike, and we believe you have your quad Bravo and quad Charlie turned off in your DAP at this time, and a 5 degree deadband. We'd prefer a 10 degree deadband for your sleep period overnight here. Over.

Okay.

One other item relative to a malfunction procedure. It's unlikely that you'll have to worry about this tomorrow, but in your malfunction list under docking on page F11 9, there is a malfunction procedure for a high O₂ flow rate at the top of—under tunnel at the top of page 11 9. We would like to have you not use that malfunction procedure should you encounter the high O₂ flow rate, and instead, check back with Houston for a revised procedure should you find that situation. Over.

Understand, and note has been made in my checklist.

11, Houston. Roger. That just about takes care of all the items we have here on the ground before time to hit the sack, and I guess you will have a presleep check for us before you go to bed.

Roger. We're in the midst of cycling the O₂ and H₂ fans now.

Roger.

And the radiation is as follows: CDR 11012, CMP 10013, LMP 09015. Negative medication. Over.

Houston, Apollo 11.

11, Houston. Go ahead.

Roger. We're thinking about taking the monocular with us on into the LM. We think it might prove to be of some use. Over.

Roger, Buzz. It sounds like a good idea for some of your surveying work there inside the cockpit. Over.

Okay. You want to run that by with whoever might be concerned?

Apollo 11, Houston. We have apparently lost the high gain lock. We would appreciate it if you would give us a help manually to try to relock up on the high gain. Over.

Houston, Apollo 11. ..

Roger. That's all we want. We want to stay in narrow, and we're a little puzzled about why we lost you here a few minutes ago. Do you have any ideas?

No, we sure don't (cough)—sure don't. We're showing—we're showing about 15 degrees plus pitch and about 270. That ought to be good and clear.

We concur there. We still don't have any good ideas on why we were lost then.

11, Houston. Would you confirm that we did acquire automatically when you came around the limb for this passage. Over.

That's confirmed.

Apollo 11, Houston. Over.

Houston, Apollo 11.

11, Houston. On your AUTO RCS SELECT switches, we show quad Bravo disabled but quad Charlie only partially disabled. Charlie 3, I believe, is the only one you have selected off. Is that correct?

Yes. Roger. That's correct.

Roger.

How do they look to you now, Houston?

11, Houston. We see them all disabled at this time. Thank you.

Apollo 11, Houston. Over.

Go ahead, Houston.

11, Houston. We're going to try to check out this ability to automatically reacquire on the S band, and what we want to do is to secure our uplink carrier for about 30 seconds. Then we will turn it back on and see if the spacecraft equipment will automatically reacquire. So if you do not get a call from us within about 3 minutes, that means we have not been able to reacquire and request your assistance on a manual acquisition. Over.

Okay. We understand.

11, Houston. We also would appreciate—if you will note the angles that the antenna tracks through in its attempt to reacquire. Over.

11, Houston. It looks like we're locked back up again with no delay. How does it look on board? Over.

Roger. The signal strength dropped very rapidly to zero; and the pitch and yaw, in about 3 seconds, moved toward 40 degrees pitch and 240 degrees yaw. Right now, they're sitting on about 15 degrees pitch and about 265 degrees yaw. So they didn't move very far, about 30 degrees apiece; and then they picked right back on up again. Over.

Roger. Some of “The Luckiest People” in the background there. We copied your pitch and yaw angles.

11, Houston. Could you give us the location of your—pitch and yaw location of your position indicators? Over.

Roger. They're in the same position as the antenna right now; plus 15 degrees pitch and—no, now wait a minute. I got them—got it at about 275 instead of 265.

Okay. Thank you.

11, Houston. We'd like to try the same procedure once more. We'll leave the carrier a little longer and be back up for a call within 4 minutes. Over.

11, Houston. We're locked back up again. Can you give us a report on how the antenna behaved?

Roger. It was essentially identical as before. The pitch went to 45, 40 to 45 and the yaw went to about—to about 255, 245 to 255; and then it rather quickly locked up at 15 degrees pitch and 270 yaw. Over.

11, Houston. Roger. Your angles are 45 and 255. Do I understand that as soon as the carrier dropped, it went to these angles; or did it only go to these angles after the uplink carrier was reenabled and the antenna began to reacquire? Over.

No. As soon as the carrier dropped off, why, it drifted over into those angles and stayed there. Then when it came back up again, why, it hunted around for a while, but it didn't get any further off. Gradually brought it on in to the angles where it is right now; and then the signal strength would take several jumps as evidently it goes from wide to medium to narrow. Over.

11, Houston. Understand. And on another subject, request you zero your optics for the night. Over.

Apollo 11, Houston. Can you confirm that you have changed the CO₂ filter as per flight plan in the last hour? Over?

No. We're still eating. We're about to do it. We'll let you know.

Roger, 11. And we've got about 14 minutes until LOS. AOS is 86 30, an hour away. We're wondering whether or not you plan to have one man up at that time or would you all like to be asleep inside the next hour? Over.

Somebody will be up.

Roger. The thing that we're still puzzling on is the antenna, and if—as long as there will be somebody up, why, we would like to have somebody check the automatic REACQ on the next AOS.

Okay. We'll do that. We haven't chlorinated the water yet, and we haven't changed the lithium hydroxide. We're just still finishing up dinner.

Apollo 11, Houston. We have LOS coming up in 2 minutes now, and AOS will be at 86 plus 28 plus 15. Over.

We'll see you on the other side, Houston.