I have seen duos and trios of satellites while observing. They remain in a perfect formation in pairs and triples.
I googled trios of sattelites a while back, and up came NOSS sattellites.
National Observational Surveliance Satellites.
Just checked again and the trios are lablelled Naval Ocean Surveilance System. ????
I think they must get better resolution with them in much the same way as an ARRAY of radio telescopes would.
Now I am confused with the two descriptions. Maybe we arent to know.????