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Apollo 11 re-enactment – Splashdown (July 24) – Mission audio & commentary

apollo_11_ocean_recovery Communications between Apollo 11 Mission Control and the crew in the Command-Service Module until separation and final splashdown (source: http://www.hq.nasa.gov/alsj/a11/a11transcript_pao.htm). Note times are Central Daylight Time (Houston, U.S.A.) and Ground Elapsed Time (GET); GET 00:00 was liftoff (2332 Australian Eastern Standard Time).

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 7:39  –  GET 191:07
PAO
This is Apollo Control at 191 hours, 15 minutes. Apollo 11 is now 30,469 nautical miles from earth approaching at a velocity of 11,221 feet per second.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 7:59  –  GET 191:27
PAO
This is Apollo Control at 191 hours 38 minutes. Apollo 11’s distance from Earth now 27,979 nautical miles, velocity 11,689 feet per second

Values into CM computer to extend landing range:

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 8:20  –  GET 191:48

CAPCOM
Okay, Mike. Of course, this is in the event the G&N and the EMS quits and you have to fly the constant G, and what we’re trying to do is extend the constant G range from 1100 to 1500 miles.

We’ve run this procedure in the simulators and it works fine. The best way to go through it, just go through it and if you have any questions come back. But it’s the same lift vector UP until MAX G, and then lift vector DOWN and then modulate the lift vector until g dot goes to zero.

Okay, this procedure is essentially the same so far, and then hold g dot zero until you pass the retro elapsed time of V circular and then after you pass this retro elapsed time of V circular, roll to a gimbal angle of 45 degrees, and then hold this constant bank angle of 45 degrees until you’ve come to the retro elapsed time of drogues. Over.

SC
Okay, it sounds straight forward enough. Understand constant G backup procedure lift vector UP until MAX g and then lift vector,DOWN, then modulate until bank angle until g dot equals zero, then g dot equals zero until
(APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 8:20  –  GET 191:48)
SC
sub circular and then roll 45 degrees and hold until drogue time. Over.

CAPCOM
Hey, that’s mighty fine, Mike. That’s correct.

PAO
This is Apollo Control at 192 hours 2 minutes.

This will be first time in Apollo that crews have flown lift vector UP during reentry. Normally, lift vector is down. However, we want to extend the range by 215 miles so for a short period about a minute and 25 seconds during the blackout period the spacecraft will be flown with lift vector up. The computer program for that is number 65, up control.

Apollo 11 is now 25,301 nautical miles from Earth, velocity has increased to 12,263 feet per second.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 8:35  –  GET 192:03
PAO
This is Apollo Control at 192 hours 30 minutes.

Apollo 11 now 22,130 nautical miles from earth; velocity 13,053 feet per second.

We’re 2 hours 32 minutes 32 seconds away from entry interface.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 9:05  –  GET 192:33
PAO
This is Apollo Control at 192 hours, 48 minutes.

Apollo 11 is 19,914 nautical miles from the Earth approaching at a velocity of 13,695 feet per second. We’re 2 hours, 14 minutes, 16 seconds away from entry into the atmosphere, the U.S. Air Force C-135 crew will attempt to photograph this re-entry of the command module.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 9:25  –  GET 192:53
PAO
This is Apollo Control at 192 hours, 55 minutes.

A few of the entry event times have changed from a second to 4 seconds. Others remain the same. Here’s the updated times:

  • entry, 195 hours, 3 minutes, 7 seconds;
  • begin blackout, 195:03:25, 05g 195:03:36;
  • end blackout, 195:07:00;
  • drogue shoot deployment, 195:12:08;
  • main shoot deployment, 195:12:56;
  • landing 195:17:53.

Maximum G load expected during the entry, 6.20.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 9:50  –  GET 193:18
PAO
This is Apollo Control at 193 hours 20 minutes.

Apollo 11 is 15,854 nautical miles from Earth, velocity 15,154 feet per second.

We’re just – we’re 1 hour 43 minutes away from entry and here are the altitudes at which the entry events are expected to occur:

Entry at 75 statute miles, beginning blackout at 62 statute miles, 05 g 57 statute miles, end blackout 41 statute miles, drogue chute deployment 23,300 feet, and main chute deployment 10,500 feet

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 10:00  –  GET 193:28
PAO
This is Apollo Control at 193 hours 30 minutes.

Apollo 11 now 14,374 nautical miles from earth; velocity 15,788.

We expect entry velocity at 36,194 feet per second.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 10:20  –  GET 193:48
PAO
Apollo Control at 193 hours, 50 minutes.

Apollo 11’s distance now 11,463 nautical miles approaching at a velocity of 17,322 feet per second. We’re just under an hour away from scheduled command module-service module separation and about an hour and 12 minutes away from entry.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 11:00  –  GET 194:28
PAO
Apollo 11’s distance now 5411 nautical miles; velocity 22,642 feet per second.

PAO
Apollo 11’s distance now is 3000 nautical miles; velocity 26,685 feet per second. In the next 20 minutes Apollo 11 will add almost 10,000 feet per second to that figure.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 11:25  –  GET 194:53

PAO
800 nautical miles high. Velocity 33,000 feet per second.

Guidance reports Apollo 11 right down the middle of the corridor. 7 minutes away from entry.

PAO
Apollo 11 lined up right down the middle of the entry corridor.

Velocity’s now 35,578 feet per second. We’re a minute and 45 seconds from entry.

Black out will begin 18 seconds after entry.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 11:23  –  GET 195:01

PAO
We’re at entry time.

Blackout very shortly.

Range to go to splash 1533 nautical miles.

There’s blackout. This blackout period should last for about 3 minutes 45 seconds. At blackout we were showing velocity 36,237 feet per second. Range to go to splash 1510 nautical miles. The elapse time for end of blackout 195 hours 7 minutes even.

Drogue shoot deployment time is 195 hours 12 minutes 8 seconds. And the Control Center will not attempt to communicate with Apollo 11 after drogue deploy time. It will leave the air ways clear for the recovery forces.

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 11:42  –  GET 195:10
PAO
We’re 7 minutes, 44 seconds from entry. Drogue shoot deployment scheduled for an elapsed time for an entry of 9 minutes, 1 second.
CAPCOM
Apollo 11, Houston. Standing by for your DSKY reading. Over.
PAO
Hawaii rescue 2 reports an S-band contact with the spacecraft.
CAPCOM
Apollo 11, Houston. Stand by for your miss distance. Over. Apollo 11, Houston. Standing by for your DSKY reading. Over.
SC
Drogues.
CAPCOM
Apollo 11, Houston. Your DSKY reading please. Over.
SC
(Garble)
PAO
Apollo 11 reports right on. We take that to mean that the drogues deployed on time.
SC
69, 15.
PAO
Apollo 11 should be on main chutes now. Hornet reports a sonic boom a short time ago. We’re just under 4 minutes to landing. We will continue to monitor for any conversations between the spacecraft and recovery forces, but we will not initiate a call from now on for the spacecraft from the control center.
HORNET
Apollo 11, Apollo 11. This is Hornet, Hornet. Over.
SC
Hello, Hornet, this is Apollo 11 reading you load and clear. Our position 133:0, -69:15.
HORNET
Roger, Hornet copy. 13301675. Any further data?
SC
330, 169, 15.
PAO
Hornet has voice contact. Aircraft reports visual with 3 full chutes.
HORNET
A condition of crew. Over.
SC
The condition of crew is 4000 – 3500 feet on the way down.
HORNET
11, this is Hornet. Copy. 11, what’s your splashdown error? Over.
SC
Okay. Our splashdown error is by latitude, longitude, 133016915. That’s (garbled).
HORNET
Roger, out.
PAO
Hornet reports spacecraft right on target point.
HELO
Okay, Hornet. Apollo 11 in sight.
HORNET
Roger. Apollo sighted on chutes.
HELO
(Garbled) contact here at 150 holding. Apollo 11, (garbled).

APOLLO 11 MISSION COMMENTARY    7-24-69     CDT 11:42  –  GET 195:10
HELO
190.
HORNET
Hornet, roger, out.
HELO
(garbled) bearing 2 zero zero.
SC
Apollo 11 at 1500 feet.
HORNET
Hornet, roger, copy, out.
PAO
That’s Neil Armstrong giving the position report.
HELO
Have a visual of about a mile and a half.
HELOS
(garlbed)
HORNET
Hornet, roger.
HELOS
(garbled) spacecraft.
SWIM 1
Roger, this is swim 1, Apollo 11.
SC
(garbled) 100 feet.
SWIM 1
Roger, you’re looking real good.
HELOS
(garbled)
SWIM 1
Splashdown, Apollo has splashdown.

———–

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Posted using the 2009 version of Windows Live Writer.

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