The radars in ATF and USNF are not at all realistic. Their ability to see the enemy out to the maximum range, regardless of what the enemy is doing, is absurd. Radars have serious limitations. Some radars are blind to objects moving the same speed as the radar. Other radars have serious trouble with ground clutter. However, Jane's/EA did not leave us high and dry in this regard. The Doppler settings give us the ability to make these seekers far more realistic. This tip requires any versions of DuoSoft's Toolkits.
Speed Above: This setting determines how easily the radar can see targets that are above the radar's altitude. The lower the setting, the better the performance.
Speed Below: This setting determines how well the radar will see targets that are below the radar's altitude. The lower the setting, the better the performance.
Doppler Min Range: This setting determines how far away a target must be for the speed settings to have an effect. The radar will see any target that is closer than this range, regardless of relative speed.
Look Down: This setting will reduce the radar's effectiveness as a target goes lower and lower. When the radar has to point 45 degrees down to see the target, the target's RCS will be reduced by this percentage. As it goes further, it reduces even more (until the target is 90 degrees down -- or directly below you -- when it's RCS is reduced by 200%)
All Aspect: This setting determines the amount to reduce the target's RCS when it is facing directly towards the radar. As the target turns away from the radar, it's RCS will increase until it reaches maximum with the target pointing directly away from the radar.