[aprssig] APRS-WSPR APRS from anywhere!
crvickru at lakeheadu.ca
Mon Oct 10 20:42:57 CDT 2016
So from what I gathered you can send 22 characters total which includes the
callsign and grid square?
On Mon, Oct 10, 2016 at 7:48 PM, Robert Bruninga <bruninga at usna.edu> wrote:
> Good point. APRS WSPR would be like most APRS bulletins and status..
> Directed to ALL.
> But I think I will work on a simply possible QSO token. A sender asking
> for a reply would include a QSO token in his message and then the resposner
> could use that token instead of a full call.
> On Mon, Oct 10, 2016 at 1:52 PM, crvickru <crvickru at lakeheadu.ca> wrote:
>> I am currious about the messaging aspect of this technique. How would yoy
>> encode the destination of the message?
>> Sent from my Samsung Galaxy smartphone.
>> -------- Original message --------
>> From: Earl Needham <earl.kd5xb at gmail.com>
>> Date: 2016-10-10 10:42 AM (GMT-05:00)
>> To: Robert Bruninga <bruninga at usna.edu>
>> Cc: TAPR APRS Mailing List <aprssig at tapr.org>
>> Subject: Re: [aprssig] APRS-WSPR APRS from anywhere!
>> For many years, I've suggested using high speed CW. You could then use
>> just about any amateur radio frequency. WSPR might have better decode, but
>> CW is the "old stand by".
>> Vy 7 3
>> On Sun, Oct 9, 2016 at 1:20 PM, Robert Bruninga <bruninga at usna.edu>
>>> The more I think about it the more I get excited about building up an
>>> APRS-WSPR Gateway system. With the 27 dB signal processing gain of WSPR,
>>> then a 1W transmitter is the same as 1000 watts. And for receive, since
>>> APRS can have HF receivers everywhere, then this can really expand the
>>> usefulness of APRS anywhere in the world including on the fringes of our
>>> existing network.
>>> QST in September showed the $29 TAPR WSPR daughter board that plugs onto
>>> a Rasberry pi and although it is only a 100 millliwatt transmitter, with
>>> enough WSPRgates, that should not be a problem. But adding a 1W PA will
>>> always help!
>>> I already have come up with a compression technique that can improve on
>>> the existing gridsquare (60x120miles) down to (18x12miles) and down to 3
>>> miles or nearly a half mile for 5 and 4 letter calls.
>>> see http://aprs.org/aprs-wspr.html
>>> Lets get those WSPR boards on the air!
>>> Bob, WB4APR
>>> aprssig mailing list
>>> aprssig at tapr.org
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