11–20 of 26 posts
I think this is a candidate for best two sentence combo ever written: So we have 1 million chainsaws per second, for 335.36 hours, which is 1.215 × 10^12, a configuration known as tera-wield. This requires expert juggling skills.
> Tetris is an inventory-management survival-horror game with 19 principal characters, each with its own story arc
For those who might not be aware, early computer memory relied on essentially the same principle: https://en.wikipedia.org/wiki/Delay-line_memory
A memory made of the vacuum of space. The lightest hard drive ever.
For those who might not be aware, early computer memory relied on essentially the same principle: https://en.wikipedia.org/wiki/Delay-line_memory
I have a crazy idea. The round trip travel time of light to the moon and back is about 3 seconds, and we did leave a mirror up there. At modern modulation rates and with multiple frequencies of light in use at the same time (aka different color lasers), a lot of data can fit into that 3 second window. A memory made of the vacuum of space. The lightest hard drive ever.
Laser moonbounce is harder to do than radio.[2] Early systems used so much laser power that they had to be equipped with radars to turn the system off if aircraft were in the area. Later systems with safer lasers could detect single photons with a 40cm telescope and transmit a 2KHz signal.
[1] https://en.wikipedia.org/wiki/Earth%E2%80%93Moon%E2%80%93Ear...
[2] file:///home/john/Downloads/SLR2000_Eyesafe_and_autonomous_single_photoelectro.pdf
For those who might not be aware, early computer memory relied on essentially the same principle: https://en.wikipedia.org/wiki/Delay-line_memory
For those who might not be aware, early computer memory relied on essentially the same principle: https://en.wikipedia.org/wiki/Delay-line_memory
I have a crazy idea. The round trip travel time of light to the moon and back is about 3 seconds, and we did leave a mirror up there. At modern modulation rates and with multiple frequencies of light in use at the same time (aka different color lasers), a lot of data can fit into that 3 second window. A memory made of the vacuum of space. The lightest hard drive ever.
Also between atmospheric distortion and dust/micro meteorites you'll going to need to be very careful on your error encoding choices.
Earlier quoted context omitted.
I have a crazy idea. The round trip travel time of light to the moon and back is about 3 seconds, and we did leave a mirror up there. At modern modulation rates and with multiple frequencies of light in use at the same time (aka different color lasers), a lot of data can fit into that 3 second window. A memory made of the vacuum of space. The lightest hard drive ever.
Sure. You can also do radio moonbounce, which radio hams routinely do.[1] About 2.5 secs of lag. It takes a sizable antenna. You could probably use that as a delay line. Noisy, so error correction will be necessary. Laser moonbounce is harder to do than radio.[2] Early systems used so much laser power that they had to be equipped with radars to turn the system off if aircraft were in the area. Later systems with safe…
Earlier quoted context omitted.
I have a crazy idea. The round trip travel time of light to the moon and back is about 3 seconds, and we did leave a mirror up there. At modern modulation rates and with multiple frequencies of light in use at the same time (aka different color lasers), a lot of data can fit into that 3 second window. A memory made of the vacuum of space. The lightest hard drive ever.
Sure. You can also do radio moonbounce, which radio hams routinely do.[1] About 2.5 secs of lag. It takes a sizable antenna. You could probably use that as a delay line. Noisy, so error correction will be necessary. Laser moonbounce is harder to do than radio.[2] Early systems used so much laser power that they had to be equipped with radars to turn the system off if aircraft were in the area. Later systems with safe…
Earlier quoted context omitted.
Sure. You can also do radio moonbounce, which radio hams routinely do.[1] About 2.5 secs of lag. It takes a sizable antenna. You could probably use that as a delay line. Noisy, so error correction will be necessary. Laser moonbounce is harder to do than radio.[2] Early systems used so much laser power that they had to be equipped with radars to turn the system off if aircraft were in the area. Later systems with safe…
Would you have a working link to that second PDF?
Doing this with low-power lasers requires rather good receiving optics.
There has been a major breakthrough in laser data transmission - the first cat video has been sent by laser to and from a spacecraft. "At the time, Psyche was traveling 19 million miles (31 kilometers) from Earth, about 80 times the distance between Earth and the Moon. Traveling at the speed of light, the video signal took 101 seconds to reach Earth, sent at the system’s maximum bit rate of 267 megabits per second."[3]
[1] https://ilrs.gsfc.nasa.gov/lw15/docs/papers/SLR2000,%20The%2...
[2] https://ilrs.gsfc.nasa.gov/lw13/docs/presentations/adv_degna...
[3] https://arstechnica.com/space/2023/12/a-cat-video-highlighte...
Earlier quoted context omitted.
Sure. You can also do radio moonbounce, which radio hams routinely do.[1] About 2.5 secs of lag. It takes a sizable antenna. You could probably use that as a delay line. Noisy, so error correction will be necessary. Laser moonbounce is harder to do than radio.[2] Early systems used so much laser power that they had to be equipped with radars to turn the system off if aircraft were in the area. Later systems with safe…
This seems more like the airplanes problem than my problem...