Originally Posted by
Noodle
Most people will tell you that electronic warfare (EW), which includes electronic attack (EA) and electronic protection (EP), is classified and can't be discussed. Poppycock. There is a vast amount of open-source information which fully explains both radio frequency (RF) theory and all of its constituent parts. There is an equally vast amount of open-source information about jamming techniques used to defeat victim radars. The classified stuff is not really important to a theoretical discussion, or even to a simulation of an EW environment; it deals with the specific operating characteristics of threat systems and the specific methods used to exploit weaknesses in that system. DCS is a fictional environment, so there are no intelligence sources or methods to protect, and threat systems can have representative but fabricated characteristics...the kind you find on Wikipedia. But I digress.
The real world of EW involves stand-off jamming (SOJ) like a Prowler or Growler flying an orbit at standoff range, stand-in jamming (SIJ) like a Prowler/Growler escorting strikers to a target, and self-protection jamming (SPJ) like the A-10's ALQ-131/184 pod. SOJ/SIJ involve numerous techniques which deny acquisition of the protected asset(s); some techniques deny the victim radar's ability to determine range, some azimuth, and others speed/doppler. SOJ can mask entire strike packages if conducted on-axis and with enough effective radiated power (ERP). On the other hand, SPJ typically applies to individual aircraft which are being actively tracked/targeted by a threat radar. Track breaker techniques slowly walk the victim radar away from its target--usually in range or doppler--then abruptly stop transmitting, leaving the victim radar looking at empty space. These techniques are used in conjunction with expendables and maneuvering to either deny a shot opportunity or to generate sufficient miss distance for shots taken. There are even decoys like the ALE-50 and MALD/MALD-J to help out...to say nothing of the HARMs . There are other players too, like RIVET JOINT, but that's another topic.
In DCS, we get almost none of this. We get an SPJ pod, but it doesn't act like a real SPJ. Instead, it's more like a weak "noise jammer" similar to early SOJs in that it denies range until the victim radar overpowers the jammer, a condition called burn-through. This is not an effective track breaking technique because it does nothing to defeat the acquisition or targeting radar once it is able to track you...it measly decreases the range at which the threat radar can track the aircraft. Oddly, ED chose to model the SPJ's limited time of transmission, which would only be appropriate if it was a track breaker...which it's not.
DCS doesn't simulate any other jamming technique other than noise jamming, nor any EA effect other than denial of range. Operation of the SPJ temporarily reduces a threat radar's detection/track range by a certain percentage. This is often unnoticeable because SAMs in DCS don't shoot at Rmax anyway, or at least they didnt...I'm not sure if ROE settings in the ME have given more control over the behavior in the past year or so.
So that's it, really. Radar is wildly undersimulated, therefore it's almost impossible to realistically degrade its operation. Perhaps with the F/A-18's new radar model, we'll begin to see more realistic implementation of radar in general. As it stands, I have yet to identify necessary radar system data in the DCS game files. There are entries for things like scan time, max number of target tracks, doppler notch "size", and minimum detectable RCS, but nothing about a given radar's operating frequency, radiated power, beam width, pulse repetition frequency (PRF), etc. These parameters would be necessary in order to have any sort of realistic EW implementation.