I wonder if there really is demand for it. Being outside of the U.S., I
can't say for sure, but I thought that GPS location was required in cell
phones sold there (not here).

I think cell phones are normally located through the cell tower network, not
through GPS. I could be mistaken.

If that's the case, it would be likley that cheap GPS clocks could be
made, and they are not affected by the noise commonly produced by many
modern electrical/electronic devices.


You do realize that GPS does not work inside most buildings?

In fact the main selling point of longwave is that it goes through
everything (even underground), isn't it?