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[aprssig] K6RPT-12 Balloon INFO for newbies

Steve Noskowicz noskosteve at yahoo.com
Mon Dec 3 20:37:22 UTC 2012


OOPS:    Smaller circle shows above 5 degrees above horizon.
[ possible double post - glitch]

>  
> High Altitude Floater Balloon with APRS on its way !!  This
> is the group that sent one across the Atlantic last
> December.     http://www.californianearspaceproject.com/ 
>    Click the Twitter link for updates. They haven’t been
> very verbose. 
> 
> Due to GPS issues, some position reports are bad. 
> Watch those that show around 110 k feet.
> 
> Location pages:
> http://aprs.fi/#!call=a%2FK6RPT-12&timerange=21600  
> (better in view of GPS issues)
> ... or ... 
> http://www.findu.com/cgi-bin/find.cgi?call=K6RPT-12
>  
>    It will be around 100,000 feet and have a 400 mile
> radio horizon.    If it gets close enough (I doubt it)
> I’ll try to receive it directly.
>   Based on the December 2011 launch, it’ll pass south of
> Illinois about 23 hours after launch which is about 6:26 CST
> - though this is VERY ROUGH since that launch was in the
> morning. This was in the evening and who knows what the jet
> streams are doing now.
>  
> The larger circle at APRS.FI appears to be the Radio
> Horizon.
>    http://aprs.fi/#!call=a%2FK6RPT-12&timerange=21600 
>     Smaller circle shows above 5 degrees above horizon
> 
> If you want to read the telemetry, read the RAW PACKETS on
> either of the pages below.
> 
> The altitude in FEET follows the "A=".
> 
> To calculate the battery voltage,:
>    Take the HEX number after the "V".
>    Convert to decimal.
>    Multiply by 0.009677 to get volts. [note slight
> correction per CNSP]
> 
> Example V244 = 5.615648 Volts
>    244 hex = 580
>    If you want to do it manually, The digit weights are
> 256, 16, 1
>    ... 244 calculates as
>        2 x 256 + 4 x 16 + 4
> 
> Steve
> 
> Raw Packets direct:
> http://aprs.fi/?c=raw&call=K6RPT-12
> http://www.findu.com/cgi-bin/raw.cgi?call=K6RPT-12
> 
Steve, K9DCI




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