[doorgunner69]

Seems BS.

The satellites would all be so close in angular separation as seen from the moon as to make the usual GPS location algorithm rather useless. (Signal processing weenies please clear that up). You have to have some appreciable X-Y-Z to establish a fix.

Curiously, last job I had was working on a system to allow lunar explorers to navigate like with GPS. Øbowel killed the return to the moon mission, and I retired in disgust.

We were working on a local lunar surface based system. I was working the RF propagation and reception segment of the idea.

[stars & stripes forever]

Signals from existing global navigation satellites near the Earth could be used to guide astronauts in lunar orbit, 385,000 km away.

So, exactly how strong are the signals coming from our cell phones' GPS?

[doorgunner69]

Ah, I see they are talking lunar ORBIT, not surface navigation. My comment may be irrelevant, not unusual for me.

[Viking2002]

Oh, yeah, I can hear it now:

(In a lilting female British accent): "In one quarter mile, turn left."

"In five hundred yards, turn left again and head back to the off ramp."

"In seven hundreds yards, turn around at the satellite and head back to the off ramp."

"In one mile, turn around and head back to the interstate."

"In two miles, fire maneuvering thrusters and just head back to earth, you inebriated twit."

[Right Wing Assault]

Stable orbits around the moon are tricky. That big Earth causes trouble for high altitude orbits.

https://science.nasa.gov/science-news/science-at-nasa/2006/30nov_highorbit/

[MayflowerMadam]

Hearing “Re-calculating” could be disturbing for them.

[fieldmarshaldj]

*ping*

[minnesota_bound]

If astronuts follow the gps they will drive right into a crater!