[OZAPRS] HF APRS and HF Balloon APRS

[Peter]

Humm

Good point didn't think of that... Maybe loaded whip..

Regards

Peter

Sent from my iPad

> On 17 Jul 2014, at 1:15 pm, "Darkside" <lenniethelemming at gmail.com> wrote:
> 
> 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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