How long does it take NASA to ping a satellite or spacecraft that's orbiting the earth’s moon?

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tinytank
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How long does it take NASA to ping a satellite or spacecraft that's orbiting the earth’s moon?

by tinytank » Thu Feb 18, 2021 6:23 pm America/New_York

Exact time including all 1,000 milliseconds be very nice to know.
Last edited by tinytank on Fri Feb 19, 2021 2:32 pm America/New_York, edited 1 time in total.

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Re: How long does it take NASA to ping a satellite or spacecraft that orbiting the earth’s moon?

by GES DISC - jimacker » Fri Feb 19, 2021 12:48 pm America/New_York

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.

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