This is Apollo Control at 5 hours, 32 minutes Ground Elapsed Time. Apollo 15 now 22,102 nautical miles [40,933 km] out from Earth. Velocity; 12,844 feet per second [3,915 m/s]. Crew most likely - it's pretty hard to tell what they're doing at this time. Most likely though, they're in an eat period, scheduled in the Flight Plan to start at 6 hours. Here in the Control Center, the Systems Engineers are devising a simple test to track down some apparent short-circuit indications in the valve system to the Service Propulsion System. It's what is known in Flight Control vernacular as 'funnies.' There's no great concern over the on board and telemetered indications of these two valve positions. The crew was instructed to open some circuit breakers upstream of the two valves, but at some time in the not too distant future the CapCom will relay to the crew, instructions for troubleshooting the anomaly. And at 5 hours, 34 minutes Ground Elapsed Time; this is Apollo Control.
005:55:28 Fullerton: 15, Houston. When you - when ya'll get a chance, we'd like to go with this SPS Thrust light check.
005:55:37 Worden: Okay, Gordo. I'm over in the left couch now; let's go ahead and try it.
005:55:37 Fullerton: Okay. Stand by; I'll get everybody watching [their consoles, in Mission Control]. Okay. First of all, I'd like to be sure that both the Pilot Valve circuit breakers on panel 8 [to the far left of the Main Display Console] and both Delta-V Thrust switches are Off - both circuit breakers.
005:56:04 Worden: Okay, Houston. Both Pilot Valves [circuit breakers] are Open, and the Delta-V Thrust switches are Off.
005:56:10 Fullerton: Okay. Now when we do the following steps, we'd like you to watch the SPS Thrust light, and watch it for changes either going out or changes in intensity. We're trying to determine if it's a high resistance or a low resistance short; and if it gets brighter, that'll tell us something about this short with any one of these actions.
005:56:34 Worden: Okay.
005:56:35 Fullerton: Okay. First item is: put the thrust hand controller clockwise, and watch the light.
005:56:51 Worden: Ah, Gordo. Do you mean the THC, the translation hand controller?
005:56:54 Fullerton: Rog. That's what I meant. THC, clockwise.
005:56:58 Worden: Okay. We'll go clockwise with it. We're clockwise, and no change.
005:57:06 Fullerton: Okay. Put the THC back to neutral.
005:57:09 Worden: Rog. [Pause.]
005:57:20 Fullerton: Okay. SPS Thrust switch, Direct On.
005:57:32 Worden: Okay. SPS Thrust, Direct On.
005:57:37 Fullerton: And any change in the light?
005:57:39 Worden: I didn't see any change. And it's Off.
005:57:46 Fullerton: Okay. Back to Normal.
005:57:47 Worden: Rog. Back to Normal.
005:57:50 Fullerton: Okay. We'd like you to do the first part of an EMS Delta-V check - from page G2-5 and just the first steps - down to the - you don't have to do the bias check, but the first six steps there.
005:58:11 Worden: Right. [Pause.]
005:58:22 Fullerton: [The] idea here is to check for a possible short in the Delta-V test circuits. It might be causing the light [to come] on. [Long pause.]
005:58:45 Worden: Okay, Gordo. That part of the check's been run and it's shut off at a minus 21.4 in ten seconds, and the SPS light - the SPS Thrust light got distinctly brighter during the decelerat... or during the acceleration period.
005:59:02 Fullerton: Roger, Al, copy. And I'll see if there is anything else they [the engineers in Mission Control] want to do here.
005:59:11 Worden: Roger. [Long pause.]
005:59:34 Fullerton: Okay, Al. I guess no more questions right now. We'll mull that over a little bit.
006:17:31 Worden: Okay, Gordo; go ahead. I've got the G&C Checklist out now.
006:17:35 Fullerton: Okay; on that 9-4, the first one is changing NBD-X, the static drift compensation for the X-gyro. Under load Alpha, the octal ID number 11, which now reads 77332, change that to 00377. Over.
006:18:00 Worden: Understand. That's Alpha octal ID 11, where it now says 77332, change that to read 00377.
006:18:10 Fullerton: That's affirmative. And on load Bravo, IDs four and five are changed. This changes Tephem[erides] to correspond with actual lift-off. And load 4, which is now 30560, change that to 32251. And while you're still writing, change the next one, load - or ID number 5, from 10000 to 26157.
006:18:49 Worden: Roger; understand. That's column Bravo, IDs 4 and 5, change 4 to 32251, and 5 to 26157.
006:19:00 Fullerton: That's correct. That's - that takes care of it, Al.
006:19:05 Worden: Okay.
This is Apollo Control. Apollo 15 now 27,621 nautical miles [51,154 km] out from Earth. Velocity now 11,498 feet per second [3,506 m/s]. Spacecraft communicator Gordon Fullerton passed up some troubleshooting procedures on the apparent short circuits that are causing some spurious indications not only in the spacecraft cockpit, but also here in the Control Center through telemetry. The pilot valves were opened, the Delta-V lights turned off on the EMS, or the Entry Monitor System, thrust controller was rotated clockwise and back to neutral, The SPS Thrust switch was turned to Direct On and then back to Normal, and the first six steps of the entry monitoring - Entry Monitor System Delta-V check were run. It was noticed the SPS engine [Thrust] light On was brighter during the deceleration [means acceleration] period, and at that point the troubleshooting was terminated for the time being while the systems engineers here in Mission Control mull over the situation. Also the people in the Spacecraft Analysis Office, the so-called SPAN room. No great amount of concern here over the apparent short circuit that's causing these indications. But further attempts will be made to isolate what the cause of the indications are. Guidance, Navigation, and Control Officer should be briefing the Flight Director before too long on what his recommendations are. And at 6 hours, 22 minutes Ground Elapsed Time, still live on air/ground, this is Apollo Control.
This is Apollo Control at 7 hours, 14 minutes. Flight Director Gerry Griffin and his Gold team of flight directors - flight controllers have completed a handover to Flight Director Milton Windler and the Maroon team. CapCom for the Maroon team is astronaut Karl Henize. We're estimating the change of shift news conference for 4 pm Central Daylight Time, 4 pm Central Daylight Time. Apollo 15 is 10,526 nautical miles from Earth. Velocity - ah, belay that. Distance is 33,154 [nautical] miles [61,401 km], velocity is 10,526 feet per second [3,208 m/s].
This is Apollo Control. The change of shift news conference will begin momentarily in the MSC News Center Briefing Room. We will take down the release line during this news conference. We will tape any air/ground transmissions and play those back following the news conference. At 7 hours, 30 minutes; this is Mission Control, Houston.
007:35:10 Henize: Hey, the results that we got out of that last test procedure - didn't solve many problems for us. I guess the best we found out was that we don't have a simple problem like a stuck EMS relay. And there's a lot of thinking going on down here, and at the present time, we line up three - three possibilities, depending on where the [electrical] ground is in the system. And the first one is that it's still a ground that simply turns on the light and affects nothing else. Second possibility, that it's a ground that's going to light the engine early when you put on the Delta-V Thrust switches. And there's a third possibility, that the - the ground is upstream of the pilot valves, and that we'll bro - we'll blow the Pilot Valve circuit breakers and lose that bank, if - if we're unlucky. We're busy down here working on a procedure that we could use at Midcourse Correction 1 to decide which - which of these three possibilities is the right one. And we're talking about getting this all worked out and sent up to you in about 2 hours.
007:52:33 Henize: We're seeing a low O2 repress package pressure down here. Okay; we'll take that back. We have a suspicion that we have a low O2 repress package, and I would like to have an onboard readout of your pressure there.
007:52:50 Scott: Okay. [Pause.]
007:53:03 Scott: Houston, it is a little low. We just never finished filling it after we pressurized the tunnel.
007:53:09 Henize: Rog. [Pause.]
007:53:14 Henize: They say they'd like to go to Fill now and get it filled up.
This is Apollo Control at 7 hours, 59 minutes. During the change of shift news conference, there were three brief air/ground conversations totalling 2 minutes, 40 seconds. Most significan of these was the first one, about 20 minutes ago, in which CapCom Karl Henize passed up the three possibilities on the short circuit causing the SPS light and advising the crew we will pass up a procedure to them about 6 pm Central Time. We'll play that tape now and then stay up live.
This is Apollo Control at 8 hours, 19 minutes. Apollo 15 is 39,282 nautical miles [72,750 km] from Earth. Velocity; 9,629 feet per second [2,935 m/s]. Command Module Pilot Al Worden is now performing the cislunar navigation task scheduled in the Flight Plan. It's going well.
This is Apollo Control at 8 hours, 51 minutes. Apollo 15 is 42,124 nautical miles [78,013 km] from Earth. Velocity; 9,269 feet per second [2,825 m/s]. The evaluation of the troubleshooting and operational procedures to be taken because of the SPS Thrust On light problem is continuing. We expect the procedure that will be used during the midcourse correction 1 time to be ready to pass up to the crew by 6 pm Central Daylight Time. There is the possibility that we will continue with another troubleshooting procedure prior to the midcourse time. The backrooms are taking a look at that right now. We'll continue to stand by live for any air/ground. This is Mission Control, Houston.
This is Apollo Control at 9 hours, 6 minutes. The cislunar navigation sightings are continuing aboard Apollo 15. We do plan, tonight, to go through the procedures in an attempt to isolate the suspected short circuit in the SPS [Thrust-on] light. These procedures will be passed up to the crew shortly, and they will be performed at the time of the midcourse correction number 1, at 11 hours, 55 minutes [Ground] Elapsed Time, that's about 8:30 pm Central Daylight Time. There is a possibility that some additional troubleshooting will precede these procedures. That has not yet been determined, but the plan is to definitely go through the procedures tonight in an attempt to isolate the location of the short circuit. Continuing to monitor live; this is Mission Control, Houston.
009:22:36 Worden: Houston, this is 15. Ready on that update concerning the UV photos.
009:22:42 Henize: Roger. On page 3-15 in the Flight Plan, in the left column, about the 17th line down, we have 2 frames with filter number 2.
009:22:58 Worden: I found that line.
009:23:00 Henize: Roger. And instead of 2 frames at 20 seconds, we would like one frame at 20 seconds; and we would like a second frame at 2 seconds. [Pause.]
009:23:21 Worden: Roger. I copy one at 20 seconds and one at 2 seconds.
009:23:31 Henize: Roger. The reason for that is that they have recently measured a secondary light leak in that filter, and they need a - two different exposures like this to really separate the two peaks in the filter transmissitivity. [Pause.] Incidentally, this is going to pertain to all the UV photography of the Earth on down the line, but we'll - we'll update it as we come to them. [Long pause.]
009:24:16 Henize: And, 15. We have a preliminary procedure about to come up to you to see if we can isolate whether this ground in the SPS system is in bank A or bank B. And that'll be coming up in just a few minutes. We...
009:24:34 Worden: Okay. I understand.
009:24:35 Henize: And we would like to do that before we start the UV photography.
009:24:40 Worden: Very well.
009:26:38 Henize: 15, this is Houston. I have the preliminary procedure I spoke about and we're hoping you might be able to do it while Al works with the P23.
009:26:48 Scott: Okay; go ahead.
009:26:53 Henize: You might refer, if you want to see what's going on, to Drawing 8.9 down in area E-3. We're playing with the - Delta-V Thrust switch, and the idea is this: First of all, let's open the - the Group 5 circuit breakers on panel 229, both Main A and Main B. That's a back-up to the SPS Pilot Valves on Panel 8, which we also want open. Verify that.
009:27:25 Scott: Okay. Group 5, Main A and Main B on 229. Stand by.
009:27:33 Scott: Okay, both those are open.
009:27:35 Henize: Roger. We've verified Group 5, both open; and the SPS Pilot Valves both open. Then, we'd like to take the Delta-V Thrust A switch and try to balance it right in a center position. Tease it back and forth a little bit to see if you can get any flickering in the SPS Thrust - Thrust On light.
009:27:58 Scott: Okay. Stand by.
009:28:05 Henize: Ah, Jim, let's - let's hold up a little bit before we do that. We don't - We're not all set up down here to watch that also. So let's - let me read on through the procedure.
009:28:15 Scott: Okeydoke.
009:28:16 Henize: If the light does flicker, of course, that's going to isolate, in this case, if we were playing with - with the Delta-V Thrust A switch, that'll isolate the problem into the - to the A bank of valves. If we don't see any flicker, then we'll go ahead and try it with the B - well, with the B bank. Actually, we would like to go ahead and do it with the B bank also. So, stand by a moment.
009:28:55 Henize: We'd like to have a [setting of the] High Gain [antenna], [to] Medium [beamwidth].
009:29:01 Scott: High Gain, Medium.
009:29:22 Irwin (onboard): [Garble].
009:29:28 Scott (onboard): No. No. It's not under EMS.
009:29:30 Irwin (onboard): [Garble].
009:29:31 Scott (onboard): What?
009:29:33 Irwin (onboard): [Garble].
009:29:37 Scott (onboard): No, we're not. We're talking about Group 5, on 229.
009:29:42 Worden (onboard): [Garble].
009:29:47 Scott (onboard): No, he's also - he's talking about pilot valves.
009:29:49 Worden (onboard): Oh, he is? [Garble] circuit breakers [garble]. That light.
009:30:05 Scott (onboard): Huh! EPS Group 3. He said Group 5.
009:30:14 Irwin (onboard): He said Group 5?
009:30:15 Scott (onboard): Group 5. It's Group 3 here. That's not what he's working on. He's working on the Delta-V thrust. 8.9-E3.
009:30:24 Worden (onboard): 229, GROUP 3.
009:30:37 Scott (onboard): Huh!
009:30:41 Henize: 15, this is Houston. We're ready to go ahead. Verify again the Group 5 breakers and the SPS Pilot Valve breakers, and then let's tease that Delta-V Thrust A switch. Try to balance it in a central position.
009:30:56 Scott: Okay. Will do. We - we note that drawing 8.9 Echo 3 doesn't seem to fit what you're doing. [Long pause.]
009:31:17 Henize: Actually, it's area Echo 3 and 4, and it simply shows you the Delta-V Thrust switches there.
009:31:24 Scott: Oh, okay. Okay.
009:31:26 Scott (onboard): Shoot!
009:31:27 Henize: The light has a contact, whether that switch is On or Off and we would like to balance it half way between so that we don't have a contact.
009:31:36 Scott: Okay. Here goes Delta-V [switch] A now. [Pause.] Okay, A is up and on, and the SPS Thrust light is off. [Long pause.]
009:31:51 Worden (onboard): It is? Gee! Good grief!
009:32:00 Henize: Would you confirm that the Delta-V Thrust A switch is up and the light went out. Is that correct?
009:32:06 Scott: That's correct. It's still in the up and On position, and when I went to the On position, the light went out.
009:32:13 Henize: Thank you.
009:32:17 Scott: I'll just leave it there while you think about it.
009:32:19 Henize: Thank you. That's - stand by.
009:32:28 Worden (onboard): Wonder why it'll do that?
009:32:30 Scott (onboard): [Snicker.] I can only think of one reason - that it's really in backwards. Did you cycle those switches [garble], Jim?
009:32:39 Worden (onboard): Aah...
009:32:41 Scott (onboard): Yes, you did - pulled the circuit breakers out to see if the light would change any.
009:32:45 Worden (onboard): Yes.
009:33:04 Irwin (onboard): I think I would've, too. But he...
009:33:06 Scott (onboard): [Garble] contact [garble] that contact - [laughter]. That's amazing. No. In either position, though, the light should come on.
009:45:16 Scott: Okay. No change at all with the Bravo on, cycling several times through the middle.
009:45:20 Henize: We copy. [Pause.] Okay. Leave Bravo Off, and let's cycle A again.
009:45:31 Scott: Roger. [Pause.]
009:45:41 Scott: Okay. Right in the center of - the contacts with A, right between the two, I can get the light to go out. But now, when I go on up - up and On, the light comes on again. And now, I've come back to the Off position, and the light's off. So, I think you've isolated your problem.
009:45:59 Henize: Roger.
009:46:03 Worden (onboard): Think so, too. That just says we're going to have to use - ban - bank B this time.
009:46:16 Scott (onboard): It says you're going to have to pull the circuit breakers on A.
009:46:20 Worden (onboard): Yes.
009:46:21 Scott (onboard): Before the shutdown.
009:46:22 Worden (onboard): Yes. Well, either that or - yes, that's right, see.
009:46:25 Scott (onboard): Because if it doesn't, there's no guarantee the switch is going to do you any good.
009:46:30 Worden (onboard): That's right. Okay, we got an ap - optics calibration here? What - what star is it?
009:46:49 Worden (onboard): We're at that attitude now.
009:46:51 Scott (onboard): Oh, okay. That's - star number 1.
009:46:53 Worden (onboard): Star number 1 again, huh? Okay.
009:47:08 Worden (onboard): Okay; we should be looking right at it.
009:47:46 Scott (onboard): Why do we get...
009:48:07 Scott (onboard): I don't - I don't know why I get an ignition. We got the light on, but that doesn't say we have an ig - ignition signal. Threw that switch. How could that switch affect the ignition signal unless it was there from someplace else?
009:48:24 Worden (onboard): Yes. Hey, that's right.
009:48:27 Scott (onboard): The switch can't produce an ignition signal without something else producing the ignition signal. It sounds to me like the light circuit breaker switch.
009:48:37 Worden (onboard): Yes.
009:48:38 Scott (onboard): You know they took the FCSM out.
009:48:40 Worden (onboard): I know it.
009:48:41 Scott (onboard): [Garble] they really got a complicated system.
009:48:47 Henize: 15, this is Houston. We're willing to stop playing with the - with the light problem at the present time. We'd like to verify that both Delta-V Thrust switches are Off. And we'd like to have the Group 5 circuit breakers both Closed, but please keep the Pilot Valve circuit breakers Open.
009:49:05 Scott: Okay. Delta-V Thrust verified Off. Pilot Valves verified Open, and we'll Close the Group 5s.
009:49:14 Worden (onboard): Okay. We're done - 20C.
009:49:15 Henize: Thank you.
009:49:17 Scott (onboard): Okay, let's go to UV then. Jim, watch the Itek.
This is Apollo Control at 9 hours, 53 minutes. This troubleshooting with the [Apollo] 15 crew has just [been] completed. It does give us confidence that the Delta-V Thrust switch A is faulty; whether through contamination or whether something is loose in the switch, we don't know, but it does give us confidence that both banks of ball valves in the Service Propulsion System are okay. We do not now plan to proceed with the procedure that had previously been planned for midcourse correction 1. We're confident that we can develop procedures to operate bank A safely whenever we burn the engine.
009:57:54 Henize: Let's - summarize our situation with that - with that Thrust - Thrust On light. The telemetry we got down here - we actually have two lights which show up in that area, E-4 and 5 on diagram 8.9 - gave us some rather confusing data that we don't understand yet, but we'll be working on it. But we - we do feel confident enough that there's no need to fire the engine at the present time, and since the midcourse [correction number] 1 is a correction of 2.8 feet per second we don't think that we'll be having a midcourse 1. For your information, at the present time, midcourse 2 looks about like 5.0 feet per second.
009:58:42 Scott: Okay; understand. We'll just hold tight; skip midcourse 1; stand by for [midcourse correction] 2.
009:58:47 Henize: Roger. [Pause.] And, 15, be advised we'll have a Flight Plan update in the near future.
009:59:01 Scott: Roger. [Pause.] That was a pretty good S-IVB, wasn't it?
009:59:09 Henize: Roger. [Long pause.]
009:59:32 Henize: Hey, and you can tell Al up there that those look like real good P23 markings.
009:59:38 Scott: Okay. He's glad to hear that.
009:59:41 Worden: Very good, Karl.
AS15-99-13410 - Ultraviolet photograph of Earth taken through filter 1 - Image by NASA/JSC/Arizona State University.
AS15-99-13411 - Ultraviolet photograph of Earth taken through filter 2 - Image by NASA/JSC/Arizona State University.
AS15-99-13412 - Ultraviolet photograph of Earth taken through filter 2 - Image by NASA/JSC/Arizona State University.
AS15-99-13413 - Ultraviolet photograph of Earth taken through filter 3 - Image by NASA/JSC/Arizona State University.
AS15-99-13414 - Ultraviolet photograph of Earth taken through filter 3 - Image by NASA/JSC/Arizona State University.
AS15-99-13415 - Ultraviolet photograph of Earth taken through filter 4 - Image by NASA/JSC/Arizona State University.
AS15-99-13416 - Ultraviolet photograph of Earth taken through filter 4 - Image by NASA/JSC/Arizona State University.
AS15-91-12344 - Comparison image of Earth on colour film - Image by NASA/Johnson Space Center.
This is Apollo Control at 10 hours, 20 minutes. The Apollo 15 crew now taking ultraviolet photographs of the Earth as scheduled in the Flight Plan. Apollo 15 is 49,511 nautical miles [91,694 km] from Earth now. Travelling at a velocity of 8,407 feet per second [2,562 m/s].
010:23:52 Henize: We would like to have Omni Bravo, please.
010:39:31 Henize: 15, This is Houston. I have a Flight Plan update whenever you can copy it - to be followed by a P27 update and P37 block data.
010:39:44 Irwin: Stand by. [Long pause.]
010:40:02 Irwin: Okay, Karl. I'm [garble] you a Flight Plan.
010:40:06 Henize: Okay. As is obvious [because of the cancelled midcourse correction maneuver], you can delete all of the midcourse activities, beginning there at 11:21, running through the burn status report. And the other activities this evening can be moved up so that you can go to bed as early as 12 hours GET, if you wish. A couple of notes here is that we do want you to stay up to 12 hours in order that we can finish a battery charge that's in progress. And, also, that waste water dump; be sure to - to do the water dump before you start PTC [Passive Thermal Control].
010:40:45 Irwin: Okay. We understand that.
010:40:50 Henize: And, I'm - I've got a P37 for you - plus 25 hours, if you're ready.
010:40:59 Irwin: Stand by one. [Long pause.]
010:41:29 Irwin: I'm ready for the P37 for 25 hours.
010:41:33 Henize: Roger. 025:00, 4621, minus 175, 075:21; 035:00, 6821, minus 174, 074:51; 045:00, 5605, minus 175, 099:06; 060:00, 5448, minus 175, 123:06 and that's the end. [Pause.]
010:42:13 Irwin: Readback. 025:00, 4621, minus 175, 075:21; 035:00, 6821, minus 174, 074:51; 045:00, 5605, minus 175, 099:06; 060:00, 5448, minus 175, 123:06.
010:43:15 Henize: That's all correct. The next one I have is a P27 update.
010:43:22 Irwin: Stand by. [Long pause.]
010:43:35 Irwin: Okay; I'm ready on the P27.
010:43:37 Henize: Roger. It's - the purpose, V71; GET 11:45:00; INDEX 21, 01501, 00001, 71465, 41437, 76654, 45425, 77003, 52553, 72602, 54007, 75455, 55217, 76267, 55324, 00402, 05560, and that's all.
010:45:02 Irwin: Okay. On the P27s; 71, 11:45:00; 21, 01501, 00001, 71465, 41437, 76654, 45425, 77003, 52553, 72602, 54007, 75455, 55217, 76267, 55324, 00402, and 05560.
010:45:55 Henize: That's all correct. Thank you, Jim.
This is Apollo Control at 11 hours, 2 minutes. Apollo 15 is 52,749 [nautical] miles [97,691 km] from Earth. Velocity; 8,101 feet per second [2,469 m/s]. A short time ago we advised the crew that they could delete all of the midcourse correction 1 activities, and move up the other activities so that if they wish they may go to bed at 12 hours elapsed time, about 1 hour from now. As yet, we do not have an indication from the crew what they plan to do. We'll continue to stand by and monitor live for any air/ground conversations. This is Mission Control, Houston.
011:14:30 Irwin: And, Houston, this is 15 now. Looking at the Oxidizer Pressure on the SPS, looks like it's a little low; I just wondered what you all are reading down there? [Long pause.]
011:14:55 Henize: 15, this is Houston. We're reading a pressure of 168 [psi] down here on the SPS Oxidizer and that's normal at this time. We expect it to be a bit low because of absorption in the helium.
011:15:09 Irwin: Okay; thank you. [Long pause.]
011:15:34 Henize: And, 15, this is Houston. When you doff your biomed harnesses, we'd very much like to have you double check those sensors. We've been getting poor readings in respiration from all three of you, and we'd like to have you report any anomalies in - in how they're rigged on you.
011:15:57 Scott: Roger. We'll do that.
011:15:58 Henize: You can send that down with the evening report.
011:38:11 Henize: 15, this is Houston. Anytime you have the time to copy down about six lines of information, I could give you a general update on the UV filter photography. [Pause.]
011:38:27 Scott: Okay; stand by one, Karl. [Long pause.]
011:38:54 Henize: And, 15, we'd like to have you verify that the waste water dump has been terminated.
011:39:00 Worden: That's a verify. [Long pause.]
011:39:55 Irwin: Okay, Karl; I'm ready to copy [the] Flight Plan change relative to the UV [photography].
011:40:01 Henize: Roger. The change is the same as I gave you before. When you're shooting the Earth, two frames with filter 2, at - what was formerly 2 frames with filter 2, exposure time 20 seconds, in the future, it will be one frame, filter 2 with an exposure time of 20 seconds. And one frame, filter 2, exposure time 2 seconds. And the following is the places that this occurs in the Flight Plan in the future. First is page 3-38, line 17. I believe we've probably passed that one already. The next one is - Negative, we haven't passed that one yet. The next one is page 3-57, line 16. The third is page 3-167 - both at 123 hours, 49 minutes and 123 hours, 56 minutes. The next is page 3-352, line 16. The next is page 3-378, line 16, and the final one is page 3-402 parenthesis, it says here, Earth UV line 16.
012:04:59 Henize: Your spacecraft [rotation] rates are low enough now to spin up for PTC, but we'd like for you to verify first that all of your dumping has been finished. [Pause.]
012:05:17 Worden: Karl, we'll hold off for a little bit here and finish up the dumping before we go into PTC.
012:05:24 Henize: Roger.
This is Apollo Control at 12 hours, 6 minutes. The spacecraft rate of revolution that we've set up for this Passive Thermal Control throughout the rest period is 3 tenths of a degree per second. This will provide thermal balance for the spacecraft and its systems during the rest period. Apollo 15 now 57,742 nautical miles [106,938 km] from Earth, travelling at a velocity of 7,745 feet per second [2,361 m/s].
012:18:39 Henize: 15, this is Houston. In connection with the respiration sensor problem, we'd like for you to - go through a special procedure for us before you - you doff your biomed harnesses.
012:18:59 Scott: Okay. Stand by one, Karl. [Long pause.]
012:19:25 Scott: Okay, Houston; ready to copy special procedure.
012:19:29 Henize: I'm sorry. I didn't - I don't think it needs copying, but we'd like all three of you - when you go into the doffing phase here, we'd like all three of you to pull off the impedance pneumograms. Those are the two respiration sensors back on your kidneys there. Pull them off, and let any - let any trapped air get out, and then reseal them and give us a couple minutes of read-out down here to see if that improves the situation.
012:20:01 Scott: Roger. We'll do that. [Long pause.]
012:20:31 Henize: 15, this is Houston. We can terminate the battery Bravo charging.
This is Apollo Control at 12 hours, 40 minutes. Apollo 15 has just passed the 60,000 [nautical] mile [111,120 km] mark outbound to the Moon. Distance now 60,188 nautical miles [111,468 km]. Velocity; 7,555 feet per second [2,303 m/s].
013:37:48 Henize: 15, this is Houston. On your PTC, when it started out, it looked okay; but we find that it's diverging now, and we're going to have to reinitialize it. We suggest this time around that we use a - a rate of .375 [degrees per second] in Noun 79, that might help.
013:38:11 Scott: Okay; .375 in Noun 79.
This is Apollo Control at 13 hours, 39 minutes. We've asked the crew to try again on Passive Thermal Control. [We] did not achieve the 3/10ths of a degree per second that we were looking for after the PTC stabilized. We've asked them to spin it up a little faster to begin this time. That should achieve the rate we're looking for after they stabilize.
013:52:01 Worden: Roger, Karl. When the rates look like they're down again, we'll try PTC again.
013:52:06 Henize: Roger. We'd like to have you verify that all the vents are secured before we spin it up again.
013:52:18 Scott: In work. [Pause.]
013:52:28 Henize: And, 15, in this damping process, we'd like to make sure that all of the jets on two adjacent quads are disabled.
013:52:38 Worden: Roger [garble]. [Long pause.]
013:53:19 Henize: And, 15, as a part of trying to figure out what went wrong with that first PTC, we'd like to know whether or not you went into any [gymnastic] exercise period after - after we spun it up.
013:53:33 Worden: That is negative, Karl.
013:53:36 Henize: Roger. [Long pause.]
013:53:49 Scott: And, Houston, the LMP and CDR have recycled their impedance pneumograms. You can give us a word if you see - if you see any improvement in data. [Long pause.]
013:54:30 Henize: Dave, we missed that last transmission. Could you say again?
013:54:35 Scott: Rog. The LMP and CDR have recycled the impedance pneumogram, and we just wondered if you'd seen any improvement in the data [coming from it].
013:54:45 Henize: Okay; he[SURGEON]'s looking at it now, and he says, yes, it has improved. [Long pause.]
This is Apollo Control at 13 hours, 55 minutes. Apollo 15's distance [is] now 65,120 nautical miles [120,602 km]. Velocity; 7,118 feet per second [2,170 m/s].
013:55:45 Henize: 15, the Surgeon says it's okay for the CDR and the CMP to doff their biomed harnesses now. Thank you.
013:55:54 Scott: Okay. Did that - did that recycling [of the biomedical sensors] do any good?
013:55:58 Henize: Roger. The recycling cleared up the respiration data we have down here very nicely.
014:03:39 Henize: 15, this is Houston. I'm sorry to tell you that that spin-up didn't work very well. We're going to have to reinitialize again. [Long pause.]
014:04:03 Worden: Okay, Houston. We'll try it again.
014:04:06 Henize: And, Al, the - Stand by.
014:04:12 Worden: Rog, Karl. Hey, Houston, 15,
014:04:19 Henize: Go ahead.
014:04:21 Worden: Yeah, Karl, I think if there was a problem that time, it was because I hesitated just momentarily, thinking I had it Free, and I ended up in Hold.
014:04:29 Henize: Ah ha, thanks; thanks for the information.
014:04:34 Worden: Okay. [Long pause.]
014:05:20 Henize: And, 15, we think that your jet configurations were all okay that time around, but we'd like to confirm that, during damping, you disable all jets on two adjacent quads, and then for the spin-up, you use only B-2 and D-2.
014:25:41 Henize: Fif - 15, this is Houston. [No answer.]
014:25:56 Henize: 15, this is Houston.
014:26:00 Scott: Houston, 15. Go.
014:26:02 Henize: It looks like we've got it pretty well wrapped up for your rest period. We've got three or four small items to remind you here. Crew status report is outstanding; onboard readouts, we'd like; and whenever your ready, we're ready for an E-memory dump.
014:26:24 Scott: Okay. We're about that point of the checklist, and we'll give you the whole page at one time. Stand by one.
014:26:30 Henize: Okay.
This is Apollo Control at 14 hours, 28 minutes. As the Apollo 15 crew prepares to wind up a long day, the spacecraft is 67,080 nautical miles [124,232 km] from Earth. Velocity; 6,992 feet per second [2,131 m/s].
014:32:44 Scott: Okay, Houston, 15. We're ready for the E-memory dump for you, if you're ready.
014:32:53 Henize: Okay, 15. We're ready to go with it.
014:32:58 Scott: Okay, here it comes. [Long pause.]
014:33:52 Scott: And, Houston, 15. We've got the rest of the presleep checklist if you're ready to copy. [Pause.]
014:34:07 Henize: Roger, 15. We're ready to copy.
014:34:12 Scott: Okay. Crew status report: everybody's in good shape; no medication today. Onboard readouts: Bat[tery] C, 37.0 [volts], Pyro Bat A, 37.2; Pyro Bat B, 37.2; RCS [tank] A, 94 [percent]; B ,92; C, 94; D, 94. And the water has been chlorinated; the H2 fans have been cycled; the valves are all verified; got your E-memory dump [done]. The cabin is at 5.7 [psi]. Direct O2 [valve] is closed, and I guess we're ready to go to sleep communications configurations. [Long pause.]
014:35:23 Henize: Roger, 15. We copy all of that, and the Surgeon has a question about - was - were there any obvious anomalies in the biomed harness?
014:35:34 Scott: No, as a matter fact, we were just discussing that. Al and I both have taken them off, and the sponges are all still quite damp and have their color and they're all sticking very well. I think the system looks real good.
014:35:47 Henize: Very good. Thank you.
014:35:51 Scott: Rog. [Long pause.]
014:36:03 Henize: 15, this is Houston. I guess we're ready to go to the presleep comm configuration.
014:36:12 Scott: Roger.
014:36:14 Henize: Good night.
014:36:17 Scott: Okay; good night.
014:36:21 Henize: Incidentally, 15, your PTC's looking very good.
014:36:26 Scott: Oh, that's good. [Long pause.]
014:36:46 Scott: By the way, Karl, it's about time for you to get some sleep too, isn't it?
014:36:50 Henize: Rog. It's been a long day for all of us.
014:36:53 Scott: Yeah, I think you're a couple - three hours ahead of us.
014:36:57 Henize: Not that much.
This is Apollo Control at 14 hours, 38 minutes. We've said good night to the crew after a long day. We'll stay up live for a little while yet in case there are any postscripts to the air/ground. You heard Dave Scott, the Apollo 15 Commander, report the crew was in good shape. They've taken no medication. He gave an onboard read-out of the battery and the Reaction Control System status. Passive Thermal Control appears to be working very well now after three tries to get it established.
014:39:54 Scott: Houston, 15. One more thing here. We note on page 1-24 of the Systems book in the comm sleep configuration, you've got the S-band Norm Voice [correcting himself] Norm Mode Voice, Off. Is that correct?
014:40:14 Henize: 15, this is Houston. The noise was very bad then; are you reading me?
014:40:21 Scott: Okay, I'm reading you 5 by. Just had a question to verify the sleep configuration of the S-band. Is Mode Voice to Off?
014:40:32 Henize: That's affirmative.
014:40:33 Scott: That gives [garble] to Down Voice [Back-up].
014:40:35 Henize: That's affirmative.
014:40:36 Scott: Okay.
014:40:37 Henize: That gives us a little cleaner TM [telemetry].
014:40:41 Scott: Roger.
This is Apollo Control at 14 hours, 40 minutes, and the crew has just turned the Voice Off. The light has gone out on the INCO's [Instrumentation and Communications Officer] console indicating the crew has thrown the switch.
We'll take this line down now. If there is any further conversation we'll come back up. At 14 hours, 41 minutes into the flight of Apollo 15, this is Mission Control, Houston.