[OZAPRS] HF APRS and HF Balloon APRS

Matt VK2RQ matt.vk2rq at gmail.com
Thu Jul 17 10:35:43 EST 2014


You should take care for how you set up the path in your APRS packets. The following document provides some guidelines:
http://xa.yimg.com/kq/groups/6764416/243730317/name/APRS.pdf

(this was a recent point of discussion on the TAPR APRS mail reflector)

73, Matt VK2RQ

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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