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Apollo 13 tracking question
OK, I'm slightly confused. A while back we had a thread in which it
was stated (I believe) that ground tracking of the CSM was done by the comms system through active means on the CSM (i.e. the downlink frequency was linked to the uplink freq. for Doppler, etc.) So what was the reason for the termination of the urine dumps on 13 after the explosion? For some reason I was under the impression that the ice crystals were affecting a ground based radar tracking system. Or am I just misremembering again? Thanks! -- Jim Grasping another opportunity to be wrong! |
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Apollo 13 tracking question
"James Nowotarski" writes:
OK, I'm slightly confused. A while back we had a thread in which it was stated (I believe) that ground tracking of the CSM was done by the comms system through active means on the CSM (i.e. the downlink frequency was linked to the uplink freq. for Doppler, etc.) The LEM tracking worked the same way, I'd guess. So they could still track with no power in the CSM. So what was the reason for the termination of the urine dumps on 13 after the explosion? For some reason I was under the impression that the ice crystals were affecting a ground based radar tracking system. I believe they were worried that ejecting any mass would affect the trajectory. It acts as a very poor efficiency rocket. And in fact this was a problem, but not from the urine dumps. The LEM evaporated water for cooling. This changed the trajectory enough so that an extra correction was required.... Lou Scheffer |
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Apollo 13 tracking question
"James Nowotarski" wrote:
So what was the reason for the termination of the urine dumps on 13 after the explosion? Miscommunication between the ground and the crew. D. -- The STS-107 Columbia Loss FAQ can be found at the following URLs: Text-Only Version: http://www.io.com/~o_m/columbia_loss_faq.html Enhanced HTML Version: http://www.io.com/~o_m/columbia_loss_faq_x.html Corrections, comments, and additions should be e-mailed to , as well as posted to sci.space.history and sci.space.shuttle for discussion. |
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Apollo 13 tracking question
Well, I found the transcripts, anyway.
- Jim |
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Apollo 13 tracking question
"Derek Lyons" wrote in message
... "James Nowotarski" wrote: So what was the reason for the termination of the urine dumps on 13 after the explosion? Miscommunication between the ground and the crew. Not to be thick about it, but why? Was the ground asking for no dumps to improve radar skin paints? I thought that the dumps were essentially non-propulsive in nature. Is there a A/G or FD loop transcript available on the web? Thanks! - Jim |
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