Re:Deep Space Optical Communications (DSOC)
by p1mrx on Wednesday January 17, 2024 @09:46PM
(#39036942)
I wonder what sort of rate they'll get at Mars distance (400 million km)? Psyche's orbit is beyond Mars, so we're likely to find out if the spacecraft stays operational.
Re:Deep Space Optical Communications (DSOC)
by mfwit on Wednesday January 17, 2024 @10:31PM
(#39037393)
This pdf is like 10yrs old, but graph in the top right outlines the rate based on distance.
https://www.lpi.usra.edu/opag/july2014/posters/9-DSOC_OPAG_P...
Re:Deep Space Optical Communications (DSOC)
by p1mrx on Wednesday January 17, 2024 @10:46PM
(#39037523)
https://i.imgur.com/O9P58EG.png
The first line is around 267 Mbps, so it looks like they're expecting 10 Mbps at max distance to Mars.
Re:Deep Space Optical Communications (DSOC)
by LoveMortuus on Thursday January 18, 2024 @11:20AM
(#39043649)
That's still a really good speed, but I think the bigger question might be latency.
Re:Deep Space Optical Communications (DSOC)
by itishappy on Thursday January 18, 2024 @12:42PM
(#39044826)
Latency would be determined almost completely by the speed of light itself.
Earth to Mars ranges from 5.5*10^10 to 4.0*10^11 m, and light travels 3*10^8 m/s.
Earth-Mars latency is therefore from 3 to 22 minutes one-way.
https://www.jpl.nasa.gov/news/nasas-tech-demo-streams-first-...