Wedge313
Well-known member
Hello. I need some help with the RTCC procedures for the Apollo 12 ascent. This is my first attempt using the RTCC for calculating CSI, CDH etc. I tried to figure this out on my own, but I must be doing something wrong.
I've been able to figure out the TPI time (144:35:16 for me), and then using the LLT came up with a liftoff time of 142:00:50, CSI 142:59:38, and CDH 143:57:45. I'm able to generate the Ascent PAD.
After insertion I'm in a 45.6 x 9.9 orbit. I start P20, then P32, and wait for ten marks. But after V32, I get a 00604 alarm, "CDH to TPI time < 10 min or TIG CDH > TIG TPI"
I've run through the ascent three times, and keep getting the 00604 alarm. So obviously I'm doing something incorrectly.
I'd appreciate a walk-through for the RTCC procedures for this type of ascent and rendezvous. Thanks!
I've been able to figure out the TPI time (144:35:16 for me), and then using the LLT came up with a liftoff time of 142:00:50, CSI 142:59:38, and CDH 143:57:45. I'm able to generate the Ascent PAD.
After insertion I'm in a 45.6 x 9.9 orbit. I start P20, then P32, and wait for ten marks. But after V32, I get a 00604 alarm, "CDH to TPI time < 10 min or TIG CDH > TIG TPI"
I've run through the ascent three times, and keep getting the 00604 alarm. So obviously I'm doing something incorrectly.
I'd appreciate a walk-through for the RTCC procedures for this type of ascent and rendezvous. Thanks!