Spacelog Apollo 8

You planning on using our computer any time in the near future, I thought I'd do a little P37.

Apollo 8, Houston. You can go ahead and run that 37 and we're going to kind of watch that from the ground, too, and see how it works out. A couple of items that are just of general interest in the trajectory world. Looks like the uncertainty in position was about 12 miles. Your uncertainty in velocity is about a quarter of a foot per second. And the perigee altitude of uncertainty is 5 miles.

Roger. Understand. Just for information, perhaps you read it out on the ground. I ran our pericynthian altitude determination using first of all, P21. The star state vector that we navigated with, we have plus 84.7 mile altitude and then we ran out your state vector that you updated with us the last time. We got 64.2 and then I ran P30, using our state vector and got 82.6 nautical miles. These are all plus.

That's good.

What I'm going to attempt to do on P37 is to input your DELTA-V on your TLI plus 44 and use that 44 burn time. I notice that the entry velocity is a little high. We might not be able to do a normal P37, but we'll give it a try.

Roger.

Houston, one more question then before I start. Did you notice on this last update PAD, this minus MA NC-1. Was that referring to the P37 fast return or the nominal maneuver which you gave me?

Apollo 8, that's referring to the fast return procedures.

Houston, Apollo 8.

Go ahead.

Are you following my procedure?

That's affirmative.

Okay. This happened yesterday, too. I'm trying to load the DELTA-V you gave us in the maneuver TLI plus 44 in P37, but I keep getting an operator error everytime I try to load zeros for the termination of the middle and corner. Do you know what I'm doing wrong in my procedure?

Apollo 8, Houston.

Okay, go ahead. I can take it.

Okay, looks like the decimal point in R2 under NOUN 60 is on the extreme right-hand side so the proper load will be 06070. Over.

Apollo 8, Houston. We are about to hand over to another site so you may lose lock momentarily.

Roger, Houston. Did you receive the results of the P37?

Sure did. Looks pretty good here.

Apollo 8; Houston through Honeysuckle. The switch is completed.

You are loud and clear.

Roger.

Houston, Apollo 8.

Go ahead.

Another comment on the optics. We're in PTC right now. We are passing the—we have the roll of about 182; we're about in 226 pitch and 18 in yaw. I can rotate the shaft all the way around at this particular attitude, and I get this band of light at about 10 degrees of this side of the M-line. It—it varies in intensity with the shaft position. However, it is there at this particular attitude.

Okay. Thank you.

Jim, we have just been looking at your marks with respect to accuracy and they figure they are within a couple of thousandths of a degree of the theoretical optimum. The integrator seems to bear that out.

Well, I hope that they are enough to get us home if we have to use them.

Well, I am getting a lot of confidence in your ability to run that mystery show now.

Hey, Jim, we have to spend four more days up here with him, will you take it easy. He is already talking about going back to MIT as a professor.

Hello, Houston. How do you read Apollo 8?

Oh, loud and clear.

You sure do sound wide awake.

Hello, Houston, Apollo 8. How do you read?

Apollo 8, Houston. Read you loud and clear. How me?

Pretty good so far. Thank you.

Honeysuckle, Houston network, on GOSS CONFERENCE. How do you read?

Houston network, this is Honeysuckle reading at 5, 5.

Roger.

Apollo 8, Houston.