[time-nuts] moon bounce for synchronization
bill.iaxs at pobox.com
Sat Jan 30 19:00:50 EST 2016
And on the top left, a fan-fold paper printer for the data.
Imagine handling all of that data manually instead of getting it in a
From: Jeremy Nichols
Sent: Saturday, January 30, 2016 12:43 PM
To: time-nuts at febo.com
Subject: Re: [time-nuts] moon bounce for synchronization
Ooh! Ooh! Not only a 5245 with a 5265 voltmeter plug-in but a 5360
Computing Pig! Great picture, thanks for posting it.
On 1/30/2016 6:16 AM, jimlux wrote:
> This month's historical picture from JPL
> This atomic clock was used at the Goldstone Time Standards Laboratory
> in 1970, to synchronize clocks at Deep Space Network stations around
> the world. This master clock was accurate to plus or minus two
> millionths of a second, when compared to clocks maintained by the
> National Bureau of Standards and the U.S. Naval Observatory. In the
> late 1960s, JPL had developed a moon bounce technique to transmit
> signals from one deep space antenna to another. Experiments included
> periodic measurement of timing signals that were reflected from the
> surface of the moon, to find out if the station clocks were within
> allowable limits for accuracy.
> Time-nut will recognize, of course, that none of the things in that
> picture are actually an atomic clock, although they are thing that are
> useful if you have an atomic clock.
> Note the sophisticated temperature monitoring system.
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