Length four grids versus length six grids in the spot database?

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KF6KYI
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Joined: 2008/08/31 - 23:55
Length four grids versus length six grids in the spot database?

I've been mucking around with trying to prototype the software for an embedded WSPR beacon controller, and rather than try to compile the entirety of WSPR/WSJT, I've been tinkering together the necessary bits to encode beacon messages on my own. That's all going well: I've got the 28 bit callsign, 15 bit grid square and 7 bit power level encoding figured out, as well as the convolutional coder, the interleaver. It all seems to work: my code is running on my macbook, generating wspr signals, and they are showing up on wsprnet.org.

But I have what will seem like a silly question: where are the length six gridsquares which are being reported on the spot page coming from? The protocol only reads four character grid squares. I thought they might be pulled from the User Info when you register on this site, but I entered that information, and they still aren't showing up in the spots database.

Just curious.