[time-nuts] moon bounce for synchronization

Bill Hawkins bill.iaxs at pobox.com
Sun Jan 31 00:00:50 UTC 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
disk file.

Bill Hawkins 

-----Original Message-----
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 
> http://beacon.jpl.nasa.gov/historical-photo-of-the-month
> 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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