Don't count on it. This radar, if it is the one I have been reading about, uses passive technology to detect minute disturbances in the radio waves of TV and radio stations. I also don't believe that it is Czech manufacture but Chinese. The bombing of the Chinese embassy was in retaliation for loaning the Serbs the radar when they shot down our F-117.
But flying the same route multiple times probably enhanced the effectiveness.
Bingo you hit it - bad guys have been working over this idea for sometime. Cell sites seem to work really well for some reason. Probably the plane is not as effective in that band of the spectrum.