Our friends from Old Cathay sell two versions of the Trimble Resolution timing
receiver: the -T and the -SMT.
The -T is a 12 channel receiver built of discrete components on both sides of
the PCB. It is spec'd at +/-20 ns accuracy (the sawtooth correction range).
It can be set up operate in a moving environment which would allow it to
function as a general purpose GPS receiver. In dynamic mode, it is abut 1/3
as accurate as when in fixed location mode. I don't have one in yet, but it
can probably take advantage of Lady Heather's precise survey position code.
The -SMT is a 14 channel receiver built around a tiny hybrid receiver module
(it never seems to use more than 10 sats in its navigation solution). It has
much fewer components than the -T version and is probably more robust/reliable.
It is spec'd at +/-15 ns accuracy. It can ONLY operate at a fixed location.
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