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http://en.wikipedia.org/wiki/Transit_(satellite)

Transit was operational in 1964.


On Apr 10, 2012, at 1:47 PM, Alexandre E Eremenko wrote:

> 
> Fred,
> I afraid they did not.
> I am talking of early 60-s. It is to this epoch that
> the first submarine missiles and unguided Minuteman belong.
> I doubt that in the early 60-s Americans had a satellite nav
> comparable to Cel Nav in accuracy.
> 
> All this can be of course checked on the Internet.
> The guidance of missiles and Sat Nav systems,
> when they started to use them.
> 
> So here is a clearly stated Question to the list:
> 
> When the first satellite based nav system came into use,
> which superceded Cel Nav in accuracy ?
> (I am sure someone has a ready ans).
> 
> Alex.
> 
> On Tue, 10 Apr 2012, Fred Hebard wrote:
> 
>> 
>> The Americans may have had satellite nav then; the Transit series of 
satellites.  I believe they had to know where they were.
>> 
>> On Apr 10, 2012, at 9:49 AM, Alexandre E Eremenko wrote:
>> 
>>> 
>>> Fred,
>>> 
>>>> Just as a side note, one reason the Soviets may have
>>>> been more interested in dip than others is that anomalous dip is more 
common in the Arctic (and Antarctic).
>>> 
>>> And I assume you have to know the position of your submarine
>>> very exactly, to be able to hit your target with an ICBM :-)
>>> Perhaps this was the reason why Schufeldt report was classified?
>>> 
>>> Alex.
>>> 
>>> P.S. I am not sure about early submarine ICBM, but once I visited
>>> an old Minuteman silo in Wyoming (it is open for the public). I was surprised that the missile
>>> was unguided. It was aimed only at the start by a sophisticated aiming
>>> arrangement, involving a hudge graduated ring... For this you need to know your launching position
>>> very exactly.
>>> 
>>> 
>>> 
>>> 
>> 
>> 
>> 
>> 
>> 
>> : http://fer3.com/arc/m2.aspx?i=118894
>> 
>> 
>> 
> 
> 
> 

   

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