[amsat-bb] Re: RX only satellite?

[Luc Leblanc]

On 6 Feb 2007 at 12:28, Robert Bruninga wrote:

> There may be a Satellite opportunity for a ham radio RX only
> payload.
> No TX allowed.
> 
> Any ideas?  It will be recoverd one year later.
> 
> All I can come up with is a satellite band moniitor that scans
> the satellte bands and makes a one year survey of QRM and stores
> it in flash.  That is, recording frequency and signal strength
> and position for a year.
> 
> Problem is, I cannot figure out how we could use the data to
> tell the good guys from the bad guys so it wouldn't tell us much
> I don't think?  
> 
> Any other ideas for a RX only space application?  Of educational
> interest?  Anyone interesetd in developing the band monitor
> payload?
> 
> Bob, WB4APR
> 
>
The icom PCr-1000 software come with a DTMF software decoder. If a terrestrial 
station sends a burst of DTMF tones at the key up identifying their station 
could be there is a way to pin point a QRM source by elimination.

This system will required each station to provide a way to inject theses DTMF 
code at the start of each transmission.

Some police radio system used this system to ID their police car. 

Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
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