Thank for the explanation on the topic. I totally agree with you that by simply overlaying the two system information together, the display would be clutter.
Just as a fun thought for potential implementation of advance radar system. Alternatively, I am thinking that if the different type of object can be displayed with different icon/color for team. (theat w/wo radar, ground, air etc). While this wouldn't "fuse" the sensor, but the amount of information provide would allow the battlespace to be monitored more effectively.
By the way, I am a big fan of how you are bringing in stealth feature to BDA. Thanks for all the hard work.