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[email protected] · March 25th 08, 03:34 AM posted to rec.radio.amateur.moderated

wrote:
On Mar 23, 9:53???pm, Klystron wrote:
???Paul W. Schleck " wrote:
??? ???Wouldn't it make more sense to include
WWV and WWVH along with WWVB?

snip

Such a system requires connectivity to the internet. WWVB does
not; just requires a receiver.

As does a GPS based time sytem.

Both WWVB and GPS require decoding of the time information by something.

Then, there is the
matter of GPS, which has a time capability that is incidental to its
navigation function.

GPS can only be used where the satellites can be "seen" by the
receiver.

Which is the entire planet.

The WWV system still has its uses. I suspect its cost is trivial
compared to other systems, too.

Would you also kindly define what is a "single axis of data,"
in terms
familiar to those involved in communications engineering and technology?

??? ???A single quantity, like time or location

What, then, would be "multiple axes of data?"

??? ???Two or more simultaneous quantities, like time AND loca
tion or
course
AND speed.

The WWV system isn't just about time. The transmitters are also
frequency standards. That's two axes of data. For those of us who
use HF, they are also propagation beacons - that's three axes.
There are also voice geomagnetic announcements - that's four axes.

GPS provides a better frequency standard that WWV.

It does not provide voice announcements or serve as a HF beacon though.

snip remaining

--
Jim Pennino

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