Hi Brooke,
On 12/18/2011 03:30 AM, Brooke Clarke wrote:
Hi Magnus:
Exactly. The main problem with the Transit system was that the receiver
needed a Cs clock for the system to work at all. GPS removed that
requirement.
Indeed. Most of that was due to the long observations times as I recall it.
The 4 satellite requirement of a normal navigation GPS receiver is there
to allow for a complete (X, Y, Z, T) solution for a portable receiver
which can't afford the weight and continuous power consumption of atomic
references... at it's time of design.
It's my understanding that a GPS receiver that uses a Cs clock has much
more capability.
The main capability would be to either provide correction/ephemeris data
(widely used) or to provide good navigation even under severe methods,
as well as direct-Y locking.
Cheers,
Magnus
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