How long does it take NASA to ping a satellite or spacecraft that's orbiting the earth’s moon?
Posted: Thu Feb 18, 2021 6:23 pm America/New_York
Exact time including all 1,000 milliseconds be very nice to know.
The Earth-Moon distance varies slightly, so the exact signal timing will vary in length as well. You may find this of interest (it includes a statement of a particular Earth-Moon-Earth communications delay).
https://aapt.scitation.org/doi/pdf/10.1119/1.2353576
Exact measurements of radar return times are the principle of measuring sea surface height by satellite, as is done with the recently launched Sentinel-6 "Michael Freilich" mission.