Definitely ELINT/SIGNIT, you see antennas but not faces of radar arrays. ELINT/SIGINT dedicated vehicles allows them to detect PGM's like cruise missiles without giving away their presence like radar, and are exponentially more difficult to defeat with anti-radiation missiles, as they don't really give off signals unless they are briefly communicating with their command posts. Modern ELINT/SIGINT is also incredibly efficient, as they can have detection range comparable to powerful radar vehicles but usually in a much smaller vehicle in comparison. Seeing how large the mast is, it lends credibility to the idea that S-350's are in fact supplementary vehicles to the existing S-400 sets as opposed to being separate regimental entities.Isos wrote:Many little antennas on that thing which suggests it's an ELINT/EW detector. I don't think it's a radar.
The way the small antennas are put makes me think it is use to find a radar emmission by compring the power of the signal so that it can find the source. Just like RWR in fighters.
ELINT/SIGINT are not completely fool-proof though, flying platforms for such niche roles are usually conducted by aircraft with either very large RCS (converted passenger planes) or clearly unique and distinct RCS (such as helicopters). Ground platforms for such roles are far less susceptible to detection, but all types of ELINT/SIGINT fail miserably to PGM's that have sufficient inertial guidance, which doesn't rely on external guidance to attack targets. Considering what was stated in the prior sentence, the inherent weakness to inertial guidance munitions makes them completely incapable of replacing conventional radars but rather a supplementary asset to work in conjunction towards them.