[OZAPRS] HF APRS and HF Balloon APRS

[vk2ycj at bravo.net.au]

Andy,

Thanks for the reply and info.

Do you use "sleep mode" on the controller on your Pico Balloon ?


Jamie VK2YCJ




> 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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