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@klcarrol
You dont want to hear "alarm stuff" from your lunar lander while going down to the surface.The PGNC System malfunctioned during the first live lunar descent, with the AGC showing a 1201 alarm ("Executive overflow - no vacant areas") and a 1202 alarm ("Executive overflow - no core sets").
In both cases these errors were caused by spurious data from the rendezvous radar, which had been left on during the descent.
When the separate landing radar acquired the lunar surface and the AGC began processing this data too, these overflow errors automatically aborted the computer's current task, but the frequency of radar data still meant the abort signals were being sent at too great a rate for the CPU to cope.
Happily for Apollo 11, the AGC software executed a fail-safe routine and shed its low-priority tasks.
The critical inertial guidance tasks continued to operate reliably. The degree of overload was minimal because the software had been limited so as to leave very nearly 15% available spare time which, wholly by luck, nearly matched the 6400 bit/s pulse trains from the needless, rendezvous-radar induced Pincs, wasting exactly 15% of the AGC's time.
On the instructions of Steve Bales and Jack Garman these errors were ignored and the mission was a success.
The problem was caused by neither a programming error in the AGC nor by pilot error. It was a procedural (protocol) and simulation error. In the simulator, the astronauts had been trained to set the rendezvous radar switch to its auto position.
However, there was no connection to a live radar in the simulator and the problem was never seen until the procedure was carried out on Apollo 11's lunar descent when the switch was connected to a real AGC, the landing radar began sending data and the onboard computer was suddenly and very unexpectedly tasked with processing data from two real radars.
Here are some great video footages of the following Apollo missions.
They offer far better quality than those of Apollo 11
Apollo 17 discovers orange soil on Moon
Apollo 15 View of Hadley Rille
Apollo 15 does Galileo's Hammer and Feather experiement
Apollo 16 examines rock as big as a house
Apollo 15 takes the Lunar Rover for a spin
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Did you know that the first human walking on the moon was german ? And a woman ?
At least according to Fritz Lang's "Woman on Moon"
One of the first serious science fiction movies. Lang is widely known for his sci-fi masterpiece "Metropolis"
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Great pictures Celeon!!! Thanks for sharing ...
Those pictures are so clear
@klcaroll
It might be habitable .. well .. no one knows what kind of aliens live in the caves on that planetMars is the next, true goal! ....It is habitable, and from the point of view of mankind, “exploitable” for our future goals!!
and the Mars dust storm is also another factor ... not sure how dangerous it is.
Has anyone thought that the speed of light will become reality one day? well .. at least before we talk about hyperspace ..
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Jupiter is hit by an object. Well .. at least another one since it was hit by a comet.
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Not forgetting that when they finally touched down and Armstrong mentioned those imortal words, "Tranquility Base, the Eagle has landed" Mission control mentioned that "...Whole bunch of guys were turning blue..." Obviously they were so close to aborting due to the extended time Armstrong had to fight the computer due to dodgy landing coordinates!!!Originally posted by klcarroll:
When you listen to the original audio from the Moon Landing, …..listen for Armstrong's remarks about "Code 1201' and "Code 1202" errors. They were the error codes that indicated that the on-board computer was being re-set in the middle of the landing sequence!!
....Also listen for Aldrin's slow, steady countdown in the background as the landing progresses: .....He is counting down the amount of Fuel left! (Less than 15 seconds worth when they touched down!!!!
klcarroll
That episode really explains how such a cool head both Armstrong and Aldrin had under a very stressful moment in human history!!!!
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Not forgetting that when they finally touched down and Armstrong mentioned those imortal words, "Tranquility Base, the Eagle has landed" Mission control mentioned that "...Whole bunch of guys were turning blue..." Obviously they were so close to aborting due to the extended time Armstrong had to fight the computer due to dodgy landing coordinates!!!Originally posted by Goose_Green:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by klcarroll:
When you listen to the original audio from the Moon Landing, …..listen for Armstrong's remarks about "Code 1201' and "Code 1202" errors. They were the error codes that indicated that the on-board computer was being re-set in the middle of the landing sequence!!
....Also listen for Aldrin's slow, steady countdown in the background as the landing progresses: .....He is counting down the amount of Fuel left! (Less than 15 seconds worth when they touched down!!!!
klcarroll
That episode really explains how such a cool head both Armstrong and Aldrin had under a very stressful moment in human history!!!! </div></BLOCKQUOTE>
While I was visiting U-505 yesterday I also explored the space exhibits at the museum in Chicago. One display showed photographs of the men with the "Right Stuff" and discussed how they were selected. As well as preferring men with many hours in high performance aircraft, they were also selected based on their psychological health and their ability to handle stress and think quickly under pressure. Armstrong ably demonstrated that he did indeed possess the Right Stuff.
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And patience is also required !
A crew of six including a french and a german astronaut have spent 105 days in isolation as part of the joint russian Roskosmos and ESA Mars 500 experiment.
The experiment's final goal is to simulate a 520 to 700 days mission to Mars.
Link to ESA article
This was the second attempt ! During the first attempt between Juli 1999 and April 2000 , tensions between test participants escalated into a fist fight with some injured after just 60 days and the whole thing had to be ended.
Long time isolation ,as it would occur in a mars mission requires a very stable crew in which all members go along with each other.
Scientists believe that the socially most stable crew is a mixed one. Either an equal amount of Men and Women or at least 40 % females.
Pure male crews tend to work fine only for shorter amounts of time while purely female crews are right out.
Experiments have shown that a purely female group is the most socially instable. Nasty disputes seem to be pre-programmed.
Who thought that ?Well i did
But a mixed gender crew is most likely to work well even for longer periods of isolation aboard a spacecraft. Especially when the members are singles and relationships can develop between them during the mission.
The ESA is already working on a handbook with.....pictures ,instructions and helpful tips on how to makein zero gravity.
No joke
They really have some people working on that. Without actual experiments, just with imagination how it could be done without someone getting injured
Banned
This was the second attempt ! During the first attempt between Juli 1999 and April 2000 , tensions between test participants escalated into a fist fight with some injured after just 60 days and the whole thing had to be ended.
That rather surprises me!
The STANDARD tour for a U.S. "Boomer" is 60 days: ......A thing that is routinely accomplished without fist-fights; ...In spite of the fact that the crews are typically all male!
Maybe ESA and their buddies need to spend a little time on a submarine! (Socko would be happy to show them around!)
klcarroll
Senior Member
