Ah ok just checking! Check your landing site using RTCC landing site update page and compare to P68No! I didn't know those existed. I'll get that done.
I misspoke, I did run P68 (V37E N68E), and that's the LAT/LON I get.
Ah ok just checking! Check your landing site using RTCC landing site update page and compare to P68No! I didn't know those existed. I'll get that done.
I misspoke, I did run P68 (V37E N68E), and that's the LAT/LON I get.
So the LGC landed more or less where it thought it was targeted, which is a good sign. However Apollo 15 had a bunch of retargeting done which probably is why you landed where you did. Nothing went wrong, per se, you just never updated your landing site or targeting (N69) during PDI like the actual landing. And you had no direction to do so without reading into a lot of targeting documentation so you did nothing wrong based on the information you had.OK so looking at my current visual it looks like I'm inside the the rille, on the west side. P68 F 06 43 gives me 02607 and 00365. The RTCC landing site update page gives me 26.074 and 3.654 initially, and 26.078 and 3.586 after I hit CLC. On the LROC map I'm using that has me inside the rille on the east side.
Is this an alignment issue? My last P52 went well, with a .00000 angle diff. And I did the LM SV uplink. Where could I have gone wrong here?
Thanks.
Did you update RLS and TLAND before PDI?OK. Like I said after the first landing, at pitch over the LPD had me aimed into the rille (which apparently I was!), and I pitched back quite a bit to stay on the east side. That's when I picked up the large aft velocity, I was trying to work out what the LPD was trying to tell me vs what I had expected to see and I let it get away from me.
I'll try it again, this time I'll re-designate less aggressively and try to land to the east of the rille, and press on from there. I had plenty of fuel the first time, even after I put on the airshow maneuvering I touched down with 6% remaining.
Thanks again.
Did you update RLS and TLAND before PDI?
Decent update is just the TLAND, you also need to update the RLS (Landing Site Vector).Yes. Or at least I'm pretty sure. I think that was in the LGC Descent uplink?
The dreaded LGC/CMC Clock Sync/TEPHEM Update procedure. I struggled with this on Apollo 11, and that time I had the automatic checklist to to help me with the back-and-forth between the LM and CSM. It doesn't surprise me that I botched it up again. If I go back to a save point before starting P63 and correct the clock, will that work? Or do I need to go back to the Activation Checklist portion?Your LGC clock time is off by about 1.2 seconds.
If I go back to a save point before starting P63 and correct the clock, will that work? Or do I need to go back to the Activation Checklist portion?
I agree with you that using the checklist and switching back and forth can get rather confusing. There's a possibility that you'll go out of sync between the two checklists and get something wrong. But it's actually not too bad if you understand what is going on during the clock sync procedure.The dreaded LGC/CMC Clock Sync/TEPHEM Update procedure. I struggled with this on Apollo 11, and that time I had the automatic checklist to to help me with the back-and-forth between the LM and CSM. It doesn't surprise me that I botched it up again. If I go back to a save point before starting P63 and correct the clock, will that work? Or do I need to go back to the Activation Checklist portion?
And regarding the landing site visual, the directions were to unzip the files into the "Orbiters top program". Where exactly do they mean?
Thanks for looking at this.
I'd agree it's not too bad...for most normal people. I'd swear I did everything the way you described, I remember coming up with a difference between the LGC and CMC times and then V55 to enter the difference. But yet somehow I got it wrong. Because this stuff bugs me I'm going to go back to a save spot before I did this the first time and try it again.But it's actually not too bad if you understand what is going on during the clock sync procedure.
This might be it. I looked at my notes, when I did the clock sync I had the CMC at 98:19:34.82, and the LGC at 98:19:34.24, a 0.58 difference. If I use the wrong sign I'd double down on the error, 1.16. Which is close to 1.2.The error could be as simple as a wrong sign for the V55