Quote:
Originally Posted by Dr.Sid
Hmm .. just had an idea. Instead of constant wave source I used random source. Or better 'sources'. Every pixel on the 50 column is 'sourced' with random numbers. Ie all wavelength from 1px and lower will be present in the noise. Result:
Very poor shadow, not extruding over 2 diameters. Even if there are higher frequencies present, then there was in the first case. The coherence indeed did it, I guess. There are also a lot lower frequencies present now. Unfortunately I can't easily create random source with predefined spectrum.
Ok .. I lower my statement into: at 130m Kilo might, but might not, create a shadow on BB.  |
Having seen the tender mask broadband noise as we neared it on a BQQ5 I can say it can certainly happen. Given the small size of a kilo I would guess that is pretty close to the range it would become obvious on the display. A Typhoon would block out probably 3x more distant. Of course you should have detected one of those well before that distance. I doubt even an aircraft carrier would create a noticeable shadow beyond 1000 yards.
Of course you have to add to that the need to have been at the appropriate depth and/or D/E to get a shadow at all.