[OZAPRS] HF APRS and HF Balloon APRS

[Darkside]

Trailing long wires are a bushfire risk. We have had payloads land across
power lines in the past.

- Mark VK5QI
On Jul 17, 2014 12:15 PM, "Peter" <vk3tbn at hotmail.com> wrote:

> Andy
>
> Thanks for trying the ISS transponder idea ..... Shame it didn't work, or
> maybe it did but there was no down links station in same area..
>
> Maybe HF is the way to go... CW.. Lat long... Or PSK... With trailing
> loaded long wire ... ( thin gauge shellacked copper wire) ....
>
> Just a thought.  Plenty of QRP. Txer kits about.
>
> Regards
>
> Pete
>
> Sent from my iPhone
>
> On 17/07/2014, at 11:41, "Andy Nguyen" <an at comms.net.au> wrote:
>
> > Hi Jamie,
> > For the VK3YT-x PICO balloons that was pretty much it!
> > There were some smarts in some versions to calculate ISS passes and
> attempt to send aprs packet to ISS but the conclusion was 10mw on a balloon
> was not enough for ISS.
> > Regards,
> > Andy
> >
> >> On 17 Jul 2014, at 8:47 am, vk2ycj at bravo.net.au wrote:
> >>
> >> Hello,
> >>
> >> The Pico Balloons sent off by Andy VK3YT has been very inspiring to lots
> >> of people - me included.  I'm amazed !
> >>
> >> I'm running VHF APRS on 2m in the car and would like to try HF APRS in
> the
> >> car on 30m.
> >>
> >> Later something in a balloon might be fun too.
> >>
> >> So, as I understand it, in the car on VHF APRS we use smart beaconing to
> >> keep the resolution of spots up but with minimal packets to prevent VHF
> >> channel congestion.  Correct ?
> >>
> >> I'm not sure what HF APRS does in the car - but my guess is that it
> >> reduces the spot resolution to give enough spots to be useful and to
> >> greatly reduce HF channel congestion.  Correct ?  Any other smarts
> >> involved ?
> >>
> >> With balloon APRS I assume the beaconing rate is probably set to once
> >> every 5 minutes - for two reasons - to reduce channel congestion and to
> >> preserve battery life.  PIC and Arduino type controllers can be put to
> >> sleep for 4.5 minutes to reduce battery drain to almost nothing - then
> >> woken up to collect the GPS and other data and then used to transmit a
> >> packet - then put to sleep again.  Correct ?  Any other smarts involved
> ?
> >>
> >>
> >>
> >> Thanks,   Jamie - VK2YCJ
> >>
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