Tempest II
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Can you quote the frequencies of wavelength for the various systems coz what I am finding suggests the are all (Russian and European) in the 3-5 and 8-12 range?Systems like SNIPER and ASELPOD are based on mid-IR optics, optimized for air-to-ground and limited air-to-air stuff as mid-IR detects engines in afterburners only. Long-IR in contrast works both for afterburn phase as well metal body glow/friction heat. So long-IR is the material for advanced IRSTS aboard modern Western jets. Russian and Chinese are not there so far . In my opinion, going for a mid-IR sensor is no-no and if PAF has decided against it for JF-17 Block3, it's a wise decision.!
https://defenseissues.net/2015/06/16/airborne-irst-properties-and-performance/
... PIRATE is a dual-band system (3-5 and 8-10 microns) ...
... OSF is an optical sensors suite used by Dassault Rafale. It consists of an IRST sensor and a video camera. Like PIRATE, its IR sensor is dual-band, using 3-5 and 8-12 micron bands. ...
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