#1 完了 实锤了 只有Apollo 11(第一次登月)的转录录像带丢失了 其他都没丢 这说明了什么?
发表于 ： 2024年 5月 14日 11:26
https://www.quora.com/How-did-NASA-lose ... o-missions
Is there any truth behind NASA losing all the tapes to the moon landings? Did they also lose all the information we had that gave them the technology to get to the moon?
OP Is there any truth behind NASA losing all the tapes to the moon landings? Did they also lose all the information we had that gave them the technology to get to the moon?
Nope.
Here is the actual story. A few years ago NASA decided, in collaboration with a TV production company , to produce an anniversary documentary about the Apollo 11 landing on the Moon.
As we all know the quality of the Apollo 11 video was not that good, the reasons behind this were mainly that to save bandwidth and power the TV camera designed for the Moon was a low definition, black and white , 320 lines and 10 frames per second unit, as opposed to the national standard in the US of 525 lines, color at 30 FPS.
This kept weight and power consumption down,
The “portable” broadcast cameras of the day were power hungry monsters and could not have been used on the Apollo missions.
So the video was non standard and not very good to start with, but as far as many people at NASA were concerned TV was not that important anyway.
In order for this TV signal to be seen on domestic TVs it had to be converted to the national standard.
This was done, rather crudely, by basically pointing a standard broadcast camera at a monitor showing the incoming signal ( it was bit more complicated than that in actual fact ).
This was all done at two receiving stations in Australia and one in California. The resulting video was then sent by microwave, land lines, satellite, and more land lines to New York from where it was once more redistributed to the networks and Houston. This was an analogue signal and all the various stages and the conversion significantly degraded the final images-
However, the incoming signal at the receiving stations ( which was mixed with data, audio and tracking info was split into two, with one leg going to the TV converter and the other, unconverted, going to a Data recorder as a back up in case there was a failure somewhere in the chain.
These back up tapes of unconverted video and data were never used and were kept at the receiving stations until the early ’80s when they were sent to Houston for storage.
The idea that NASA and the TV production company had was that by using modern digital technology they could use the unconverted raw video on the tapes to produce better video than was in existance at the time.
There was just one problem - where were the data tapes ?
After a long search through literally hundreds of thousands of tapes it was assumed that they had been reused during the magnetic tape shortage in the ‘80s.
This was not an unusual practice, and as master tapes of the landings existed, and still do , it would have been considered acceptable.
After all no one could know that digital processes 30 years in the future could have improved the pictures..
Those data tapes from Apollo 11 are the only ones missing. No video or audio ,or anything else of importance is missing.
All the video and and tapes of all other missions also exists.
The search for the Apollo 11 data tapes was instigated by NASA and not, as some HBs have stated , by investigative journalists.
No technology was lost. It is a simple matter of not having a suitable rocket to launch a manned mission to the Moon because NASA has not been given the money to do so!
The last launch vehicles capable of this, the Saturn Vs were not manufactured after the Apollo missions. They were cancelled because there was no need for them, and the US Govt was not willing to pay for more.
Is there any truth behind NASA losing all the tapes to the moon landings? Did they also lose all the information we had that gave them the technology to get to the moon?
OP Is there any truth behind NASA losing all the tapes to the moon landings? Did they also lose all the information we had that gave them the technology to get to the moon?
Nope.
Here is the actual story. A few years ago NASA decided, in collaboration with a TV production company , to produce an anniversary documentary about the Apollo 11 landing on the Moon.
As we all know the quality of the Apollo 11 video was not that good, the reasons behind this were mainly that to save bandwidth and power the TV camera designed for the Moon was a low definition, black and white , 320 lines and 10 frames per second unit, as opposed to the national standard in the US of 525 lines, color at 30 FPS.
This kept weight and power consumption down,
The “portable” broadcast cameras of the day were power hungry monsters and could not have been used on the Apollo missions.
So the video was non standard and not very good to start with, but as far as many people at NASA were concerned TV was not that important anyway.
In order for this TV signal to be seen on domestic TVs it had to be converted to the national standard.
This was done, rather crudely, by basically pointing a standard broadcast camera at a monitor showing the incoming signal ( it was bit more complicated than that in actual fact ).
This was all done at two receiving stations in Australia and one in California. The resulting video was then sent by microwave, land lines, satellite, and more land lines to New York from where it was once more redistributed to the networks and Houston. This was an analogue signal and all the various stages and the conversion significantly degraded the final images-
However, the incoming signal at the receiving stations ( which was mixed with data, audio and tracking info was split into two, with one leg going to the TV converter and the other, unconverted, going to a Data recorder as a back up in case there was a failure somewhere in the chain.
These back up tapes of unconverted video and data were never used and were kept at the receiving stations until the early ’80s when they were sent to Houston for storage.
The idea that NASA and the TV production company had was that by using modern digital technology they could use the unconverted raw video on the tapes to produce better video than was in existance at the time.
There was just one problem - where were the data tapes ?
After a long search through literally hundreds of thousands of tapes it was assumed that they had been reused during the magnetic tape shortage in the ‘80s.
This was not an unusual practice, and as master tapes of the landings existed, and still do , it would have been considered acceptable.
After all no one could know that digital processes 30 years in the future could have improved the pictures..
Those data tapes from Apollo 11 are the only ones missing. No video or audio ,or anything else of importance is missing.
All the video and and tapes of all other missions also exists.
The search for the Apollo 11 data tapes was instigated by NASA and not, as some HBs have stated , by investigative journalists.
No technology was lost. It is a simple matter of not having a suitable rocket to launch a manned mission to the Moon because NASA has not been given the money to do so!
The last launch vehicles capable of this, the Saturn Vs were not manufactured after the Apollo missions. They were cancelled because there was no need for them, and the US Govt was not willing to pay for more.