There are some important factors you've missed that provide clues as to why systems like this don't already exist and invalidate stealth investments.
The short answer is no, because the Koschmieder limit for an F35 sized target is much shorter than that which you propose. A system broadly as you describe will (empirically) detect a target with an apparent size roughly half to three-quarters the size of an F35 (frontal aspect - the only one you should care about for a defence system) from about 6km away (6.3+/- 1.3km). The limiting factors on this are principally optical, and aren't trivially solvable by just adding more pixels.
The longer answer. A 100km distant target has... (read more)
There are some important factors you've missed that provide clues as to why systems like this don't already exist and invalidate stealth investments.
The short answer is no, because the Koschmieder limit for an F35 sized target is much shorter than that which you propose. A system broadly as you describe will (empirically) detect a target with an apparent size roughly half to three-quarters the size of an F35 (frontal aspect - the only one you should care about for a defence system) from about 6km away (6.3+/- 1.3km). The limiting factors on this are principally optical, and aren't trivially solvable by just adding more pixels.
The longer answer. A 100km distant target has... (read more)