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[aprssig] UAH ballooning report (long)

Robbie - WA9INF mwrobertson at comcast.net
Mon Apr 11 13:13:56 UTC 2005


Bob,

Bad enough to transmit in the blind on the ground, now put something up 
10,000 feet transmitting in the blind???

If someone needs to control the kpc3, then the whole setup should be off 
   on its own frequency. TX and RX

Robbie

Robert Bruninga wrote:
>>>>jdw at eng.uah.edu 4/10/05 6:36:15 PM >>>
>>
>>One thing that hasn't worked is connected mode 
>>communications with a KPC-3 on the balloon.  
> 
> 
> Any attempt at connected mode will fail at altitude
> unless the command uplink channel is not on 144.39.
> Could that be it?    At altitude you get 100% interference
> from hundreds of APRS stations within hundreds of miles.
> on 144.39.
> 
> Best uplink for Balloons might be 144.990 with downlink
> on 144.39.  Or even better, the Balloon freqeuncy of 144.34.
> THat way the Balloon receiver will only hear your command 
> station...
> 
> Of course if it is listening on 144.99 then it can also serve as
> a digipeater for small low-power pocket trackers which can
> be purchased on that frequency...
> 
> Just a thought
> Bob
> 
> 
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