[time-nuts] time sync by moonbounce

[Adam Kumiszcza]

I think this is available here:
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20020033033.pdf and
here:
https://books.google.pl/books?id=vn5TAAAAMAAJ&printsec=frontcover&hl=pl&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false

Best regards,
Adam Kumiszcza

On Sat, May 23, 2020 at 5:20 PM Jeremy Nichols <jn6wfo at gmail.com> wrote:

> Sufficiently interesting that I bought a paper copy through Abebooks. Looks
> like a somewhat later version, author given as Douglas Mudgway, title
> “ Uplink-Downlink:
> A History of the Deep Space Network 1957-1997.” “Oversized,” 674
> pages. Abebooks
> lists a couple dozen copies in both hardback and paperback at prices from
> reasonable to ridiculous, as is usual for bookstores.
>
> Jeremy
>
>
> On Sat, May 23, 2020 at 3:47 AM ew via time-nuts <time-nuts at lists.febo.com
> >
> wrote:
>
> > This is a must read. Could not put it down, JPL, NASA,  Eisenhowe,r did
> > learn a lot at the same time fascinating
> > Bert Kehren
> > In a message dated 5/22/2020 10:36:53 PM Eastern Standard Time,
> > jimlux at earthlink.net writes:
> >
> > Apparently, they used moonbounce between DSN stations to synchronize to 5
> > microseconds in 1968. It was easier and cheaper than flying cesium clocks
> > around. (And the Rb standards weren't good enough).
> > https://ntrs.nasa.gov/search.jsp?R=19770007245
> > History of DSN - mostly about politics, history, transmitters and
> > receivers, but a whole section on timekeeping, phase measurements, etc.
> > starting around page 133 (The DSN Inherent accuracy project), and the
> > discovery during Mariner that UTC and UTI were different enough to cause
> > nav errors.
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> --
> Jeremy Nichols
> Sent from my iPad 6.
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