Originally posted by Shotgun:
In principle, yes. So why emit a jamming signal instead of a radar
signal since its gonna invite an ARM anyway? I really have yet to
hear of Jamming signals appearing on the HTS. Probably because
nobody does that... 
Why? Probably you may wish to know many Jammers themselves are
radar in principle but without receiver. Many types of radar are
capable to be jammers by nature. Say, those AESA radars. If the
jammer operates in the bandwidth which falls into the ARMs seeker
ranger, why cant the ARM home on the Jammer?
Its possible that Jamming signals dont appear on RWR , but how
you so sure it will not be captured by the ARM seeker itself?
Harms seeker by design covers a much wider range of frequency. The
pilot can choose AGM-88 ARMs other available operation modes if he
doesnt want the ARM being cured by RWR. He can choose HARM As
Sensor mode which let the AGM88s seeker to do its own search of
emitting target or Position Known mode to pre-emptily fire at the
jamming source provided he knows the jamming source from his own
sensor fusion or other offboard ELINT/SIGNIT sensors. In Navy,
HARM As Sensor mode is known as TOO mode, and Position Known
mode is called Pre-brief mode.
]I'm not in a position to explain why NATO radars are destroyed
by friendly ARMs. But a good clue to what causes this, could be a
mis-identification by HTS? I DID hear some rumors regarding this,
but not really validated.
The mis-ID by HTS incident shows that pilot trust his RWR and
shoots once his RWR prompts. If his RWR mis-ID the target then he
shoots wrongly.
Definitely, if its an SA-6 going active, the shot will be
taken. But if its just an ordinary search radar? It may blip on the
RWR, but it may not Alarm.
Make the fact straight here, old generation SA-6 search radar
will surely trigger the modern RWR if it detects the target
fighter. Do remember, if the SA-6 search radar sees the fighter,
the fighters own antenna should have received the non agile and
single waveform beam from SA-6 radar and modern RWR will alarm it
rather than filter it away. If the fighters RWR filters the
signal, then will be SA-6s receiver. If its blip on modern RWR,
then its blip on SA-6s search radars own receiver as well.
However, a modern phased array radar doing search may cheat the RWR
due to its electronically steered beam can be low power in
designated search direction and the phase array radar can use
multiple waveform & frequency agile beams to detect the same
air target thus without trigger its RWR.
A SEAD strike mission might see the pilot taunting the battery
to turn on their FCR to take a shot, while a SEAD Escort might want
to shoot at the search radar anyway. Much of these also depend on
restrictions applied in the operation.
Volume search radar being suppressed is just as grove as the FCR
being suppressed, How much difference will be to fire one ARM from
several ones? A SEAD Su30Mk can carry 6 KH-31P ARM, How difficult
is for different SEAD units to brief each other in order to do a
coordinated attack?
There were so much restriction placed upon NATO pilots in Allied
force, that they prevented planners from deploying desired
ELINT,SIGINT assets at the optimal positions to detect the SAM
batteries. Also, instances of Serbian battery commanders turning on
radars for 20secs, before shutting off again, limited the pK of the
HARMs. So will the pilots really shoot unless they have a real
solid idea of where the SAM is?
You can have no restrictions in your multiple-radar in
multiple-locations scenario but does matter a NATOs joint SEAD
mission to take out Integrated Air Defense System(IADS)? Actually
its quite standard practice for the US force to bring in
ELINT/SIGINT asserts in a major SEAD mission. Check here, how a
SEAD joint with ELINT/SIGINT took out the Iraqs IADS in 1991 gulf
war. Do take note, the then Iraqi IADS were mainly consisted of 2G
SAMs lacking of 3G elements like S-300/PAC-2/3
The Allied assault on Iraq saw the
collapse of a formidable integrated air defence system, probably
the most lethal outside the Warsaw pact. The Iraqi system had much
in common with the Soviet system, including equipment, deployments,
operational doctrine and diversity of types. The ease with which
the Allies crippled and then demolished this system testifies to
fundamental flaws in Warpac air battle doctrine, which would have
had a decisive influence in any NATO-Warpac conflict. What follows
is how it was done.