@Suzianne saidWell MY stuff worked🙂 Apollo Tracking and timing. There is a transponder on the lander retransmitting a signal of a complex digital pattern where the outgoing and incoming digital patterns are anded together and that analysis showed how far away Apollo was down to some 50 feet which was fine for Apollo.
Thanks!
I will take a look at this.
The engineers knew how to get the distance accurate to within 6 inches but didn't bother engineering in the digital codes to do that since 50 feet meant that at say 200,000 miles away, almost exactly 1 billion feet, 50 feet meant one part in some 10 million so 0.999999999 % of actual distance so way good enough🙂
Then there was the Timing part of my job,
A Hewlett Packard Cesium beam atomic clock and a secondary rubidium clock, and a third one, a well engineered crystal clock so triple redundancy.
The cesium clock was accurate to within one second in 3000 years. The rubidium 'only' accurate to one second in 200 years and the crystal was way worse and maybe one second in a year but the HP never failed.
The atomic clocks are needed now for Apollo and any other craft launched in space because the fact Earth turns on its axis, any given radio telescope will go below the horizon and thus lose the data stream from in this case Apollo.
There was a time limit on how much time you got to change data from one radio telescope to another which was every thing switch from say Green Bank observatory to say Parkes Observatory in New South Wales you get 100 MICROSECONDS to switch between those two or many other possible switches to not destroy vital data steams.
I think the explosion on 13 was an O2 bottle with a failing temperature probe, If I got it right it heated up the O2 bottle to the point where the pressure increased to the point where it blew up taking other stuff with it.
@sonhouse saidI love it that we have someone in these forums who worked on Apollo.
Well MY stuff worked🙂 Apollo Tracking and timing. There is a transponder on the lander retransmitting a signal of a complex digital pattern where the outgoing and incoming digital patterns are anded together and that analysis showed how far away Apollo was down to some 50 feet which was fine for Apollo.
The engineers knew how to get the distance accurate to within 6 inc ...[text shortened]... to the point where the pressure increased to the point where it blew up taking other stuff with it.
There’s an excellent video on YouTube which tracks the entire Apollo 11 flight. I especially enjoy the subtitled data of acceleration from the stage three booster out of orbit and the telemetric of the lunar lander decent.
Are you still working in retirement btw?
@diver saidNaw, after Nixon killed Apollo, STUPID move, I went into clean room technology, Ion implanters first, then CVD's, Ion etcher, electron microscopes, sputtering tools, horizontal furnaces, vertical furnaces, and the like
I love it that we have someone in these forums who worked on Apollo.
There’s an excellent video on YouTube which tracks the entire Apollo 11 flight. I especially enjoy the subtitled data of acceleration from the stage three booster out of orbit and the telemetric of the lunar lander decent.
Are you still working in retirement btw?
@diver saidDo you have a name we can search on YouTube for?
I love it that we have someone in these forums who worked on Apollo.
There’s an excellent video on YouTube which tracks the entire Apollo 11 flight. I especially enjoy the subtitled data of acceleration from the stage three booster out of orbit and the telemetric of the lunar lander decent.
Are you still working in retirement btw?
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@moonbus saidI loved him in his movies and he did his own Stunts too. Butch Cassidy and the Sundance Kid may have been one of his best among many of course. Indeed he was also a Great Producer/Director!
A giant, both on screen and directing/producing.
-VR
@Very-Rusty said“All is Lost,” was a simply stunning performance. I think he says only one word in the entire film, and there are no other actors or characters. It takes a great master to pull that off, with the camera fixed on him the whole time, and no dialog.
I loved him in his movies and he did his own Stunts too. Butch Cassidy and the Sundance Kid may have been one of his best among many of course. Indeed he was also a Great Producer/Director!
-VR
@moonbus saidAs I mentioned, Spy Game is probably not quite as recognized as his other films but I love how he handles that role.
“All is Lost,” was a simply stunning performance. I think he says only one word in the entire film, and there are no other actors or characters. It takes a great master to pull that off, with the camera fixed on him the whole time, and no dialog.
@Earl-of-Trumps saidThat's a terrific movie.
@Torunn
The Sting. One of my all time favorite movies, IMO.
Robert Redford and Paul Newman.
