[Space] aprs stuff

nils at shkoo.com nils at shkoo.com
Mon Jan 25 21:52:31 PST 2010


The APRS signal is over FM, right?  Don't we need quadrature to decode it, 
giving us only 2 channels of I+Q?

Or were you tinking of just using the USRP for location finding, and using 
a separate APRS receiver for receiving packets and trying to get the 
timing right so the USRP locates the right packet?  I guess if we're in 
the middle of nowhere there probably aren't *too* many other users to lead 
us astry...

-nils

On Mon, 25 Jan 2010, Jonathan Moore wrote:

> On Mon, Jan 25, 2010 at 2:32 AM,  <nils at shkoo.com> wrote:
>>
>> If we have a dual-antenna USRP we can use with a chase team, that'll make
>> the direction finding pretty easy.
>>
>> If we had 2 USRPs we could go a step further and do triangulation and get
>> an estimated location instead of just a bearing. :)
>
> I think that one USRP would be enough if we can get enough sepperation
> on the antina. ( It has four channels )
>


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