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Is this the photo?

http://www.gpsworld.com/gnss-system/gps-modernization/the-origins-gps-part-2-fighting-survive-10010

-- Richard

On 11-Apr-12, at 5:54 PM, Lu Abel wrote:

> If you read the history of GPS, soon after Sputnik's launch American
> scientists figured one could get positional data (maybe only a line-
> of-position, not a fix) from the Doppler shift in a satellite's
> signals.   This resulted in a very hush-hush project that resulted
> in the Transit system.   Multiple US defense projects then looked
> for a next-generation follow-up.   Fortunately (at least for the
> modern world) the projects were merged with the best ideas from each
> being selected as the projects consolidated and moved forward.   One
> specific I remember is that one of the projects proposed that the
> receivers contain an atomic clock!   For 1960s or early 1970s
> technology, not unreasonable -- we had not seen the dramatic effects
> of shrinking semiconductor technology.   Fortunately, that got
> changed.   There's a wonderful picture of a soldier wearing a full
> backpack with a large antenna sticking out of it.   It's a single-
> channel GPS receiver!   (wish I could find a copy to attach, but I
> can't)
>
> From: Alexandre E Eremenko 
> To: NavList@fer3.com
> Sent: Tuesday, April 10, 2012 11:14 AM
> Subject: [NavList] Re: Dip-meter again
>
>
> Richard,
> Thanks.
> Do you know how accurate it was?
>
> > The first TRANSIT satellite was launched in 1961. The system was
> > declared operational in 1964 and became classified. In 1967 it was
> > declassified and became available for civilian use.
>
> Alex.
>
>
>
>
>
>

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| Richard B. Langley                            E-mail:
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