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9:01 AM
Hi. I would like to ask a question of how photo data was transferred from satellites back to Earth in the pre-digital era. Is this part of SE the right one to ask this? or better astronomy or something else? Thx
 
9:19 AM
@Sebastian maybe you can go for photo.SE, btw via analog signals i guess
like old camera recorders of the pre digital era
in terms of analog signals, but for what i know there were never been an automated film camera with automatic transmission, for the develop of the film the stuff had to be bring back on earth
 
those landers and satellites definitely never made it back to earth
 
10:08 AM
@Sebastian in this case i think that an analog way to take picture was never used for space era
@Sebastian analog transmission is a thing, analog acquisition is another..
 
 
1 hour later…
11:19 AM
0
Q: Alternate printer drivers with lot of low level options, something like VueScan does for scanners but for printers

user3450548I had a chance to try VueScan, basically it's a third-party software that supports a lot of scanners and allow you to scan with a load of options, tons more than normally available even on the best proprietary driver. This way if the scanner is supported in the list even if it's cheap and have a...

 
 
2 hours later…
1:31 PM
Mariner 10 was an American robotic space probe launched by NASA on November 3, 1973, to fly by the planets Mercury and Venus. Mariner 10 was launched approximately two years after Mariner 9 and was the last spacecraft in the Mariner program. (Mariner 11 and 12 were allocated to the Voyager program and redesignated Voyager 1 and Voyager 2.) The mission objectives were to measure Mercury's environment, atmosphere, surface, and body characteristics and to make similar investigations of Venus. Secondary objectives were to perform experiments in the interplanetary medium and to obtain experience with...
specifically take a look at the television photography
The video camera tube was a type of cathode ray tube used to capture the television image prior to the introduction of charge-coupled devices (CCDs) in the 1970s. Several different types of tubes were in use from the early 1930s to the 1980s. In these tubes, the cathode ray was scanned across an image of the scene to be broadcast. The resultant current was dependent on the brightness of the image on the target. The size of the striking ray was tiny compared to the size of the target, allowing 483 horizontal scan lines per image in the NTSC format, or 576 lines in PAL. == Cathode ray tube == Any...
looks like vidicon tubes were later replaced by CCD and CMOS sensors once they became available
sounds like basically they used a bunch of photo accumulators that would build up a charge when hit by light and then released the charges by scanning it with a CRT (an electron beam that would hit each accumulator in series), they then used the output signal from that through an amplifier as the video signal
so basically direct to analog TV signal
 

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