I've been attacked at night, with no mods at all. I used to get "aircraft spotted!" and it was always too late to crash dive. Never got any warning from my radar detectors either. Thankfully I always managed to shoot them down and they never damaged me.
There's a thread where night attacks are mentioned, and how they are too frequent and too accurate - along with a fix (number 5)
http://www.subsim.com/phpBB/viewtopi...ight=sensorpak
Perhaps you should increase the "Modifier on strike probability at night", though why you'd want to is beyond me
