Spacelog Apollo 13

Roger.

Aquarius, Houston. In regards to the CO₂ canisters, by the way the PCO₂ is reading 1.6 down here now. We expect that we can get 6 more hours out of the two canisters that we have there—6 hours at least. However, at 112 hours, when we've got several people up, we're going to rig up two more and we have the new simplified procedure for doing this. However, in the meantime, should we need to have a canister change, we plan to switch to the LM primary canister. Over.

Okay. Copy that, Jack.

And, Aquarius, how's your PTC holding up?

Well, we got a little bit off Jack. The—It starts high in the LMP's window and goes low in the CDR window.

Houston, Aquarius.

Go ahead, Aquarius.

Okay. Thank you, Jack. Copying that.

Aquarius, Houston. We'd like to get a little better idea of how PTC is going. So, what we'd like for you to do is what we did last time. That is to give us a reading on the center of the Earth and the center of the Moon on the—LPD.

On the LPD. Okay, It's shifted. Let's see, the Moon's gone by and the Earth didn't come into the LPD last time.

Okay. But when it goes by the plane of the LPD, tell us where it was. Okay?

Okay, Jack. This pass, the Earth came into view at the top left-hand corner of the LMP's window and was going down. However, when it passed it wasn't as high up as the last pass. It did pass into view at the CDR window, but too high up to get an LPD reading.

Roger. Understand it went high in both windows then.

Yes, last time it wasn't even visible in the CDR's window; this time it was visible if you squatted down, but too high up to get an LPD reading.

Okay, Houston; Aquarius.

Go ahead. Over.

Okay. The moon came into view at the middle of the LMP's window, passed through the CDR's window at an LPD of 5 degrees.

Houston, Aquarius.

Go ahead, Aquarius.

Okay, Jack. On this pass, the Earth came into the view at the top part of the LMP's window, and we got an LPD angle on it as it passed through the CDR's window of a minus 4 degrees.

Okay. A minus 4. Thank you, Jack —

It's—it's above the—Okay. Are you familiar with the minus 4 being halfway through the sky part, huh?

Okay, Houston; Aquarius.

Go ahead, Aquarius.

Okay. On this pass, the Moon came into view at the top part of the LMP's window, came across higher. Jim estimates the LPD angle at a minus 15 degrees.

Okay. A minus 15 on the moon, and sounds like it's set up pretty well.

Everybody's happy with it down there?

Aquarius, it's a little too early to tell exactly how the PTC is going. We'd like to get a few more points, so keep reading them off, and we're still looking for that SUPERCRIT to go anytime.

The Moon went by the LPD at 6 degrees, plus 6 degrees.

Okay. Earth at plus 6. Thank you.

That's the Moon, the Moon.

Houston, Aquarius.

Go ahead, Aquarius.

The Moon passed by at a minus 8 degrees on the LPD. No, that's the Earth. The Earth passed by at a minus 8 degrees.

Okay. The Moon went by at a minus 8 degrees.