As depicted in the attached graph if the jamming aircraft eg

As depicted in the attached graph, if the jamming aircraft (e.g., Growler) needs to ensure that it is providing stand-off jamming effectiveness at 20nm and greater from the anti-air SAM radar system, then...

A. ... it can reduce the shown power by about 17dB

B. ... it must increase jamming power by 6dB

C. ... it cannot achieve that level of jamming effectiveness

D. ... it can reduce jamming power by about 35 dB

A. ... it can reduce the shown power by about 17dB
B. ... it must increase jamming power by 6dB
C. ... it cannot achieve that level of jamming effectiveness
D. ... it can reduce jamming power by about 35 dB

JIS CROSSOVER and BURN-THROUGH RANGES (MONOSTATIC) J-S+6dB (for this example) -10 BURN-THROUGH, Where J is minimally effective -20 -30 JAMMING Pr or J= 20 dB/Decade (CROSSOVER) 4 REQUIRED IS (6dB) SIGNAL P or S = 40 dB/Decade 1.29 -100 2 3 4 5 6 8 10 20 30 40 50 60 80 100 RANGE FROM RADAR TO TARGET (NM) EXAMPLE ONLY Figure 1. Sample J and S Graph

Solution

D. It can be reduce jamming power by about 35dB.