are these ranges for front aspect?
i mean i really doubt 30 km against raptor,of a radar that has 105 km for 5m2 or in the case if its v2 130 km for 5m2,
and as far as i know,
brahmos does not fly ALWAYS at 2.8 or 3 mach,
it needs to climb up to a certain height before it approaches maximum speed,hence it makes itself easier target to be detected and intercepted,
sub sonic can fly very close to surface,hence they are difficult to detect,