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If the margins are less than expected the test team may decide to terminate the test and re-evaluate the
predictions. Second, if a round strikes the dispensing aircraft the chase aircrew can advise the test aircraft
aircrew about the condition of their aircraft. Finally, the chase aircrew can provide additional photographic
documentation about the separation events.
Figure 3-25: Airborne Turret IR Measurement System III – (NAVAIR Photo).
3.7 LOW OBSERVABLE SYSTEMS
LO technology is a passive form of EA and has become a significant contributor to aircraft survivability
and mission effectiveness. RCS and IR signature are the two areas most relevant to EW T&E. Signature
reduction reduces the detectability of the subject aircraft. It also benefits any aircraft employing or
benefiting from RF or IRCM, as the lower signature results in higher J/S ratios at the victim sensor.
3.7.1 LO Concepts
The most important RCS consideration in aircraft design is vehicle shaping. The air vehicle is designed to
minimise the incident energy that is backscattered toward the radar, that is, the energy is directed in
CMDS performance and payload effectiveness are evaluated by testing against ground-mounted missile
seekers and radiometric measurement systems, airborne pod-mounted missile seekers and radiometric
measurement systems, and live-fire testing as discussed in active IRCM section. Figure 3-25 shows the
Airborne Turret IR Measurement System III (ATIMS III) carried by an F-15 conducting a test on an F-18
aircraft dispensing flares. The ATIMS III pod carries up to four fully instrumented missile seekers.
Signature reduction reduces the detectability of the subject aircraft
originally posted by: Zaphod58
a reply to: Xeven
The DIRCM system? There are several of them. Northrop is designing one for the F-35 that maintains its VLO characteristics, there's Guardian which was being tested as a bolt on package for KC-135s, there's an Israeli system that's been marketed to airlines.