[time-nuts] time sync by moonbounce

[Jeremy Nichols]

That’s it! And Author Mudgway turns out to be from Sonoma, a town in my
county just a few miles east of me. I wonder if I can get him to sign my
copy when it comes out?



On Sat, May 23, 2020 at 3:52 PM Adam Kumiszcza <akumiszcza at gmail.com> wrote:

> 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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-- 
Jeremy Nichols
Sent from my iPad 6.