[evlatests] L-band frequencies & radiolocation satellites

[Dan Mertely]

Hi Rick.  1246 MHz is likely a Russian L2, channel 1 GLONASS
radiolocation satellite.  1268 is likely a Chinese COMPASS E6
channel prototype radiolocation satellite.  Both are MEO systems
(25,000 - 30,000 Km semi-major axis orbits), and so should be up
for 2-5 hours at a time.

The only discrepancy is that the the COMPASS system is CDMA, with
a bandwidth of 20 - 30 MHz, whereas the GLONASS system is much
narrower, with channelizations in the 400 KHz range.

-Mert


Rick Perley wrote:
>     The L-band data taken yesterday allows a check on frequency 
> headers.  All looks correct, to an accuracy of ~100 kHz or so (presuming 
> the actual frequencies of our 'signposts' are what we think they are ...):
> 
>     I see two continuous emissions, centered at:
> 
>     1246.0, and 1268.5 MHz.  The former is quite strong, the latter is 
> very narrow and continuous.  Dan:  What are these? 
> 
>     The usual ABQ radars are seen.  There are four, two of which seem to 
> be much narrower in frequency that the others: 
> 
>     1310.0 and 1330.0 MHz. 
> 
>    
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