Spacelog Apollo 13

Okay, Jack. What you're reading now the angles? We had the Moon centered, and it's pretty close to what we have on the 8 ball, I guess. Close enough for any entry that we'd like to do.

Roger. And I'm told that Denubla—Denebola and Regulus are nearby if you wanted to make a star check.

Okay. I'm going to start pitching around again, and I'll see if I can pick them up. I have Orion out here to my left a little bit, but it's pretty close to the—oh, here. I've got Sirius. That's a nice one. How about that?

Aquarius, is Jack sitting on the rumble seat there?

He was. He just headed upstairs to take another look around.

Okay. I got a minor addition to the entry checklist for him. This time it's in the —

Okay. Stand —

— entry book.

Okay. Stand by 1. He has that in his pocket.

What I'm doing, Jack, is just—I'm pitching over now. I'm going to pick up another star. Sirius was just too far off. I thought I was going to use too much gas getting there.

Roger.

By the time I get alined in the—in the AOT—be nice if we didn't have Odyssey attached, we could just AUTO—AUTO maneuver over to these things.

Looks to us like you've got her alined, Jim, so I wouldn't worry about it too much.

Yes. I'm pretty confident that the platform's fairly decent.

Aquarius, Houston. We need an E MOD VERB 74, when you've got a chance, please.

Okay, Jack. On your entry checklist, on page 2-5. Down there on step 9, where it says 152 degrees pitch at .05g, adjacent to that, so that Recovery can see you better on the way down, we want you to turn your S-BAND, POWER AMPLIFIER to HIGH. Over.

Okay. Turn S-BAND, POWER AMP to HIGH at .05g time.

That's affirmative.

Okay. Is that it?

Aquarius, Houston. We're considering doing the midcourse with PGNS, unless you'd rather do it in AGS.

No. PGNS is fine with me. I just aline myself up with the old ball again. So I've got you foresighted again, but any way you want to do it.

Like you say, you might as well go first class.

I guess you're right.

Now wait a minute, Jack.

I just lost a lot of friends there.

And, Jack, you can tell Owen Morris that the RCS SYSTEM A/B 2 QUAD 1 breaker is still nicely in.

Aquarius, Houston. We think we've figured out a way to save you some time at a very critical—very full schedule. And that's by doing a docked coarse aline, since we got the LM up now. That would save you a maneuver or two.

Houston, Aquarius. It seemed to me a docked coarse aline might be quicker for—for Jack.

Yes. We think it would be, and it'd save quite a bit of time at a place where you're going to be pretty busy. Also save you some petrol.

Affirm.

Okay, Jim. We're looking at doing this in the service module SEP attitude, and the optics will be pointed away from the Sun. So it should be a good attitude for a P52.

Okay. So, we'll be going to the service module SEP attitude, at which time we'll do a docked coarse aline, and -

Then you want—You want Jack then to do a P527

The way we'll do that in our time line Jim, is to go ahead and do the service module JETT and then we'll just stay in that attitude and when it comes time in our time line as we've outlined, to bring the platform up, we'll proceed with the P52—coarse aline, and then the P52.

Okay. Are we going to use the same techniques that we normally do for LM activation? In other words, I try to maintain an attitude, and give him some angles and then—Are you going to give him the angles? Then he does the 52.

Basically, it's the same procedure just reversed, Jim.

Okay.

Another nice thing about this, is it's one we've done before.

And, Aquarius. One thing, however, that we do not plan to do is to proceed with the command module powerup prematurely.

Roger.

Okay, Houston. This is Jack.

Go ahead, Jack.

Okay. I just wanted to talk over with you, it looks like we've had some changes in the flight plan here, due to Jim's P52. Do you have—Can you talk over with me what your plans are?

Roger, Jack. Since we've got the PGNS up, we plan to use that information to give the CMC a dock coarse aline, and then we're in the service module jettison attitude, we'll wait until it comes time to power up the CMC, and we'll get the CMC a dock coarse aline, and we'll pick some good stars to give you a fine aline with, and it looks like we can pick some stars that are looking away from the Sun in which you can find in that service module jettison attitude; so, we'll save you quite a bit of gas: and save you some time in a very busy time.

Hey, that sounds good. Really fine.

Keeping warm?

Hey, it's warmed up here now. It's almost comfortable.

I'm looking out the window now, Jack, and that Earth is whistling in like a high-speed freight train.

We're clocking you at 48 000 miles and coming in at about 9000.

I don't think there's many LMs that have seen it like this. I'm still looking for Fra Mauro and Cone Crater.

You're going the wrong way, son.

Okay, Jack. It looks—just looking over what I may expect here, it looks like I'm just going to get three angles to do a VERB 41 NOUN 20, right?

That's what it looks like from here, Jack. It's pretty much the opposite of the LM activation procedure where we do the dock coarse aline.

Yes, except in a way we did a lot of VERB 06 NOUN 20, ENTERS, simultaneously, and then you all shipped him up post-torque values. You're not going to do anything like that are you?

Say again, please, Jack.

Okay. During the activation part, we do a lot of VERB 06 NOUN 20, ENTERS simultaneously, reading you out the difference in the angles, and then MSFN furnishes the post-torquing angles, in order to get the platform fine alined. Do you plan something like that or just three coarse aline angles.

Jack, we're going to give you three coarse aline angles, and then you can go right to your checklist as we're giving it, and start in with the VERB 40 NOUN 20.

And, Jack, how do you read?

Fine—square.

I was around shooting pictures of all the debris inside here, before we left, and I inadvertently changed the settings on the DC command module Reseau camera that we need for the service module pictures. I wonder if FAO can dig them out again—what we need, f-stop and speed.

Okay, Fred. Stand by.

Fred, in regards to the camera settings, for black-and-white 3400 film, the settings were f:5.6 at 1/250th. Over.

Aquarius, Houston. Over.

Go ahead, Houston.

Okay, Jim. I got MCC-7 pad when you're ready to copy. Over.

Okay. Stand by.

Okay. We're in luck, I got one pad left.

Okay. We'll take care not to change this one. Ready to go?

Go ahead, Joe.

MCC-7: 137:39:48.39, minus 0003.1, plus all zeros, plus 00001, N/A, plus 0020.5, 0003.1, 0:23, 008, 359; the rest is N/A. Remarks: plus-X, four jets, RCS; and your weights for the DAP load: LM weight, 25181; CSM weight, 62468. Over.

Okay, Joe. MCC-7: 137:39:48.39, minus 0003.1, plus all balls, plus 0000.1, N/A, plus 0020.5, plus 0003.1, 0:23, 008 359; the rest of pad N/A. Remarks: plus-X, four jets, RCS, ullage; the LM weight, 25181; CSM weight, 62468. Over.

Okay. Readback correct.

And, Aquarius; Houston. I have a service module SEP pad if you want to copy that, now. Over.

Say again, Joe.

Roger, Fred. I have a service module SEP pad with the attitudes. You don't need a pad sheet for it; just any old blank sheet will do.

Okay. I was going to say I don't—We don't hardly carry a service module SEP pad.

Yes, we'll have to change that.

Okay. I'm using a P27 here. Go ahead.

Okay. The pad reads as follows and then I'll repeat the angles for you, so you can copy them. The following MCC-7, maneuver the LM to the following FDAI attitudes: roll, 000; pitch, 91.3; yaw, 000. Now do you want those attitudes repeated, Fred?

Okay. Following MCC-7 we're to maneuver to the following attitudes: roll, 000; pitch, 091.3; yaw, 000.

Okay. That's correct. And the last part of the pad is at GET 138:10:00, which is EI minus 4.5 hours, execute a push of 0.5 feet per second, four jet, plus-X; perform SM SEP; then execute pull, 0.5 feet per second, four jet, minus-X. Over.

Houston, Aquarius. Jack's entering the command module, now.

Okay, Jim.

Okay. That last Joe was execute at the GET at 138:10:00 which is EI minus 4-1/2 hours; execute a push of 0.5 feet per second, four-jet ullage; then execute SM SEP followed by a pull of 0.5 feet per second, with respect to a nomenclature on the TTCA; I think we really need an up of 0.5 and then a down of 0.5.

That's correct, Fred.

Okay, Aquarius. The last pad I had for you right now is the LM jettison pad. Similar to the—Stand by 1, Aquarius.

Okay, Aquarius; Houston. Request P00 and DATA for a data load. Over.

You got it.

Okay. And I was about to say the LM jettison pad is similar to the SM SEP pad, Fred, when you're ready to copy.

Just about the same number of lines?

Yes.

Okay. Go ahead, Joe.

Okay, Fred. Prior to 141:40:00, which is EI minus 1 hour, maneuver the LM to the following FDAI angles: roll, 130; pitch, 125; yaw, 012.4. The corresponding CSM gimbal angles will be roll, 291; pitch, 196; yaw, 045, and that's the pad. Over. And the computer is yours, Aquarius.

Thank you.

Okay. A LM SEP pad prior to 141:40:00, EI minus 1 hour, maneuver to following attitudes: roll, 130; pitch, 125; yaw, 012.4. The corresponding CSM gimbal angles are roll, 291; pitch, 196; yaw, 045.

Readback correct.

Aquarius, Houston.

Go ahead, Joe.

Okay. We're so efficient down here that we got an entry pad ready, Fred. Do you want to copy that for Jack? Over.

Stand by. I'll have to try to borrow his book from him.

Roger.

Can we hold off on that a little bit, Joe?

Oh, absolutely, Jim. We're well ahead. I just wanted to let you know that we had it.

Okay. I hope that when you send up all those uplinks to Jack that you could get them up to him quickly.

We're shooting for less than 5 minutes.

Sounds good.

And are you still using the computer?

That's a negative, Fred. The computer is yours.

And, Fred, the computer has your target load in.

Okay.

Houston, Aquarius.

Go ahead, Aquarius.

Okay. I just want to clarify one thing on the LM SEP pad. It appears to me that in my configuration, I could probably use a VERB 49 loading in 622, yaw, pitch, and roll, in that order; and then being able to fly out at 5018 in roll, pitch, and yaw. Is that correct?

Stand by; I'll verify it, Jim.

Okay, Joe. And while you're doing that I've got a question about the command module checklist.

Okay, Jack. Go ahead with your question.

Okay. Either I copied the circuit breaker wrong, or—I can't read it. Comes down just about the—oh, about the 20th one down, after panel 276, where it says CB INSTRUMENTATION POWER CONTROL 3 and 4, open. The next circuit breaker on panel 5—I—Would you give that to me again?

Roger. That's CB ESSENTIAL INSTRUMENTATION POWER, MAIN B. Over. And it's, closed.

Okay. I just can't, right—I just can't read my writing, ESSENTIAL INSTRUMENTATION POWER MAIN B, closed.

That's affirmative.

Aquarius, Houston.

Go ahead, Joe.

Roger. The word we have is that you can't make a VERB 49 maneuver to the LM jettison attitude because those are FDAI angles we gave you, they don't correspond to the gimbal angles for the load; it'll have to be a manual maneuver. Over.

Okay.

And mind out for gimbal lock.

Aquarius, Houston.

Go ahead, Houston.

Roger. We're looking at LM current, to see if Jack has started his preheat, and we haven't seen it yet. Is he doing okay down there?

Houston, Jack said he's already started it, and he said that in 1 more minute, he'll be up to 20 minutes.

Oh. Roger that.

Jim, Houston. Have him let us know what his test meter reads when he's done.

He says that he had a battery A voltage drop of 2 volts, and he'll try to look at the test meter for you right now.

Okay.

He's been looking at them, but they haven't been coming up, so far.

We copy.

Do you see a current now, Houston?

Stand by 1 on that, Jim. That's affirmative, Jim; it looks like we are seeing one now.

Okay. And thanks for keeping us on it.

Aquarius, Houston.

Go ahead.

Roger. Reminder P41 for the RCS burn.

Thanks for keeping us honest.

We got to protect our jobs, Jim.

We've been DPS-ing so long here.

Okay, Houston. I finished up the maneuvers, the AUTO maneuver in 41, but only roll and yaw needles seem to be offset. Pitch is okay.

Okay, Jim. We copy. Stand by. Aquarius, Houston. We recommend PGNS MODE CONTROL to ATT HOLD. Save a little gas and stand by on the error needles.

Houston, Aquarius.

Aquarius, Houston. Did you call?

Roger, Joe. Figured, if we're going to do this burn in PGNS now, I ought to give you an update on the contingency book pages 32, 33, and 34, because the last time we went through this portion, we were burning it in ACS.

Okay, Fred. Stand by. We've been talking about possibly having you do it in ACS. We recommend at this time that you do an ACS to PGNS aline, the 400 plus 3 procedure only. Over.

Okay.

And, Aquarius, Houston

Go ahead, Houston.

Roger. We recommend that you perform this burn in AGS, as you did the last midcourse manuever; we think it will save gas. Over.

Okay. Joe, do you want me to line up the same way we did the last one, too?

Stand by on that.

And, Joe, Jack just handed me some injector temperatures, if you want to read these on … so I can plug them in.

Roger. Go ahead with those.

Okay. 5 Charlie, 14.0; 5 Dogs, 3.7; 6 Able, 3.5; 6 Bravo, 4.1; 6 Charlie, 4.2; 6 Delta, 3.8.

Okay. Copy those, Fred.

Aquarius, Houston.

Go ahead, Houston.

Okay, Jim. Our recommendation on this burn is that you maneuver to the burn attitude, in PGNS MIN IMPULSE, then do a body-axis aline, 400 plus 5, followed by 400 plus 0, and then do the burn in AGS. Over.

Okay. Now we're spinning it with the PGNS, what you gave us for a PGNS attitude. Is this the wrong one? Do you want me to just to aline up the Earth as I did before in the last midcourse?

No. We don't want you to do that. Read me your FDAI angles, and let's compare them with what we have down here.

Okay. You're looking at them in the DSKY. I've got roll of 8.47; pitch of about 0.51; and yaw looking at about 3.750.

Okay, Jim. Those are very close—I guess all you need to do is trim them up a bit.

I plan to do a final trim—AUTO trim, and then a four-jet translation.

Okay, Jim. For fuel conservation, we'd prefer you to trim it up MIN IMPULSE, and there's really very little trim required; and then go ahead and do it AGS. We're on the expected fuel usage, but we're just being old ladies about it.

Okay. Understand. My only question, Joe, is the fact that both the roll and the yaw needles did not go to null when I did an AUTO maneuver. I'd tried to go manually to the attitude; and then went to AUTO, but the roll and the yaw do not come in at all.

Roger. I haven't got an answer on that yet, but your attitude looks very close.

Okay. I can take it on …

And, Houston, Aquarius. I'm not sure that if I follow and null the needles, that will be the proper attitude.

Okay. Stand by 1, Jim. We're talking about it. It's going to be very close; in any event, close enough.

Okay.

And, Jim, just for your information, I have the entry pad. I have the landing area weather summary, which you probably don't even have to copy, but which I'll read up to you when you're ready; and some stars for Jack that I'm holding for him for later on.

Okay.

And, Joe, Jack says all the injector temperatures, he just checked them again, and they're all over 3.9 —

That they're all over 3.9 now. Thanks a lot.

You can tell him that it's looking good to us. They were even happy with the previous ones.

Okay.

And, my only question, Houston, is do you want me to null the PGNS needle manually?

Okay. Stand by 1 more minute, Jim.

Houston, Aquarius.

Go ahead, Aquarius.

Yes. I guess the basic question is comparing the balls here and out the window it doesn't look too unreasonable, and I guess Jim says the COAS is yawed and roll slightly off from what he might eyeball; but yet, the FDAI air needles for PGNS are showing a full scale left in roll and full scale left in yaw. …