[msandford]

How so? What off the shelf guidance systems exist to home in on FM radio?

I'm sure there are tons of anti-SAM guidance packages which will steer something towards a SAM transmitter, but that's in an entirely different frequency band from what I remember.

Terminal guidance systems tend to be in the UHF and SHF bands, generally gigahertz and up where as FM is VHF at about 100MHz.

It'd take a fair amount of work to re-engineer a guidance package to find such a lower power FM transmitter and perform terminal guidance on it. Especially when the world is awash in FM all around there too.

http://thediplomat.com/2014/08/the-f-35-vs-the-vhf-threat/

[bobowzki]

It's this easy.

http://youtu.be/NSC4Y8yA-jY

[msandford]

It's a very interesting talk but from what I saw that's not a terminal guidance package by any means. The antennas would need to be too big to fit into a missile. Also it doesn't work very well in an urban environment as the end of the talk shows.

There's a huge difference between targeting the radar of an aircraft or a ship or a mobile SAM site and targeting a cell phone.

[neilwillgettoit]

You don't need a complex guidance package when traditional direction finding and triangulation will produce coordinates that can be used to direct artillery, air strikes, IED, etc. Sigint targeting is quite common.