Artigo muito interessante: Stealth é necessário, mas não suficiente: adicione guerra eletrônica, inteligência e táticasPenguin escreveu:Luís, a questão eh que as capacidades do PAK debatidas em fóruns são muitas delas não baseadas no que o fabricante diz, mas naquilo que o fabricante não diz. Aí cabe tudo e o debate fica virtualmente impossível.
Até agora os russos não esclareceram qual o conceito deles para o combate BVR em um cenário com adversários com caças furtivos. Eles devem ter, com certeza. Eu duvido que tenha a ver com radares banda X. E há muitas especulações acerca do radar banda L. O certo eh que ele será utilizado para IFF em grandes FOV, curiosamente e provavelmente de forma similar ao Gripen E:
http://www.ainonline.com/aviation-news/ ... scan-driveAdvanced IFF
By contrast, the Raven employs an angled antenna mounted on what is, in effect, a rotating drum. This offers significant advantages, but has also required the solving of some technological hurdles. One of them is the development of a sophisticated 360-degree joint, derived from the oil industry that allows the passage of radio frequency signal, power and coolant through it as the drum mounting rotates.
Because the antenna rotates, it cannot mount IFF aerials, as they would change polarity with the rotation. To overcome this issue Selex Galileo has devised the SIT426 active e-scan Mode 5/S IFF system, which it claims is the most advanced in the world. It is the first IFF to use conformal e-scan arrays, three of which are mounted around the fixed portion of the nose behind the rotating antenna.
This arrangement poses its own issues, such as the requirement to sensor-fuse data from the radar and IFF to ensure accurate alignment between the two. In the Captor-E the radar and IFF share the same antenna, so do not require data fusion. In the Gripen installation, however, the fact that the IFF is separate allows it to work in close conjunction with other sensors, such as infrared search-and-track and electronic support measures.
The biggest advantage of the system is its field of regard, which easily matches that of the radar. The side-facing arrays allow aircraft to be interrogated from a parallel track, which is of particular use in a cross-border air defense scenario and is something of which more traditional IFF installations are incapable.
http://www.aereo.jor.br/2017/08/05/stea ... e-taticas/
É apresentado um gráfico para ilustrar os conceitos básicos de detecção de uma aeronave:
![[009]](./images/smilies/009.gif){kind=small}
