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The caterpillar of the eyed hawk-moth Smerinthus ocellatus is camouflaged to match a leafy background in both visible and infra-red light.. The English zoologist Hugh Cott, in his 1940 book Adaptive Coloration in Animals, wrote that some caterpillars such as the eyed hawk-moth Smerinthus ocellatus, and tree frogs such as the red-snouted treefrog Hyla coerulea, are coloured so as to blend with ...
The response to the first generation of fixed installation surface-to-air missiles (SAMs) such as S-75 and S-125 was the development of the anti-radiation missiles (ARMs) such as AGM-45 Shrike and other means to attack fixed SAM installations, as well as developing SEAD doctrines.
Electronic counter-countermeasures (ECCM) is a part of electronic warfare which includes a variety of practices which attempt to reduce or eliminate the effect of electronic countermeasures (ECM) on electronic sensors aboard vehicles, ships and aircraft and weapons such as missiles.
The receiver correlates the received signals to retrieve the original information signal. Originally there were two motivations: either to resist enemy efforts to jam the communications (anti-jam, or AJ), or to hide the fact that communication was even taking place, sometimes called low probability of intercept (LPI). [1]
The application of this anti-collision device has been refined to not only prevent midsection collisions but also to prevent their occurrences in station yards. The newly engineered solution is integrated with the signalling systems, interlocking to react appropriately in case collision-like conditions are perceived at the time of reception and ...
PTDS is compatible with other technology developed by the Army Research Laboratory, such as Serenity Payload and FireFly. [22] Although the main equipment used was the L-3 Communications MX-20 analog and later, digital cameras. The same platform utilized a high power laser that could be used for spotting and exposing insurgent locations in the ...
Small PCAS device for use in light aircraft. a Portable Collision Avoidance System (PCAS) is a less expensive, passive version of TCAS designed for general aviation use. PCAS systems do not actively interrogate the transponders of other aircraft, but listen passively to responses from other interrogations.
An anti-radiation missile (ARM) is a missile designed to detect and home in on an enemy radio emission source. [1] Typically, these are designed for use against an enemy radar , although jammers [ 2 ] and even radios used for communications can also be targeted in this manner.