@Yasar_TR what is pulse-Doppler radars Doppler shift issue which may cause problems with tracking targets moving perpendicularly? sure have little idea but if possible need to hear it from you as well .....thanks
was just reading an article about SU 24 case in Syria
I am no radar expert. My radar knowledge is somewhat rudimentary. An expert on radars may explain it better. Somebody here had mentioned
@Nutuk ?? Also
@TheInsider seems to be well versed on radars.
What I know is that almost all radars work with Pulse-Doppler Shifting.
Radars send a pulse to target and measure the time it comes back in. This is a vital measurement.
But if the transmitter sending it is moving or the target receiving it is moving, then the waves coming back can be compressed or their wavelengths can be longer depending on the target coming closer or farther.
Also if the target has a close background that reflects signals back then it becomes difficult to read the position of the target. But through relative velocity of the signals, their position can be differentiated by Doppler Shifting techniques.
By measuring the Doppler rate, the
radar becomes able to measure the relative velocity of all objects‘ returning echoes – whether planes, vehicles, or ground features - . Doppler filtering can be used to discriminate between objects moving at different relative velocities.
But if a target is moving perpendicularly, Doppler Shifting doesn’t work as the motion is tangential to wave motion. This gives zero value of Doppler Shift. It may appear as static clutter.
To overcome this the radars use certain techniques that can overcome the non existent signal of perpendicularly moving targets. A parallel processing channel radar and linear frequency modulated radar can detect zero Doppler Shift targets. How they work is beyond me. Like I said above an expert on radars should answer this.