[OZAPRS] Ultimate3 HF APRS tracker

[Owen Duffy]

Hi Hans,

On 20/10/2014 19:56, Hans Summers wrote:
>
>
> Hi all,
>
> I am designer of the Ultimate3 (a.k.a. U3), an inexpensive QRSS/WSPR
> transmitter kit (see http://www.hanssummers.com/ultimate3 ) available
> from QRP Labs http://www.qrp-labs.com . The kit has a transmitter and
> GPS interface, and can send various QRSS modes, Hell, and WSPR. In the
> forthcoming v3.06 firmware I've also added Opera and Pi4 modes.
>
> The kit can do FSK and has precise frequency control using DDS. 300
> baud HF packet with 200 Hz spacing would be no problem. It has GPS an
> the transmitter. So it seems theoretically, I should be able to add
> APRS tracker capability without too much trouble.
>
> I understand HF APRS is popular in Australia because the large
> distances involved mean gaps in 2m coverage. So I thought this would
> be a good place to ask. Two questions, if I may:
>
> Question 1: despite a lot of reading on APRS I haven't figured out
> what simple message would need to be sent for a tracker. It should
> presumably be some text where the callsign and latitude/longitude get
> inserted. Can anyone advise? What simple message needs to be sent? And
> any other things to consider?
>
Google for APRS101.PDF . You will find there is a squillion formats, but
find one that suits and use it.

Owen