Lets also say theoretically https://ieeexplore.ieee.org/document/6217012 I have this ultra high resolution to distinguish someone’s face from 400kms away. Does resolution effect the RCS of a target? For example I have a very high resolution SAR to see a 1m2 target from 400kms away on radar would ultra-high resolution give me the ability to see a smaller RCS target than this?

Resolution helps you identify the target by distinguishing various parts of it and allow you to build imagery out of it. and no it does not affect target RCS.

Target rcs from who?

From airplane which is jammed or Rcs from own airplane?

It’s clearly the target aircraft that do the jamming.
The equation for self protection jamming presented in the book assumes that the jammer can always be in the mainlobe of the victim radar e.g you’re being locked. With this the jammer will always have the advantage of injecting its techniques which will not be/seldom noise but RGPO etc.

Target RCS have little meaning for self protection as it will always be lower in terms of magnitude of power compared to what being emitted by the jammer.

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Future works for AESA radar calculator :
-more refined path propagation
-signal processor, time to introduce what is pulse doppler or MTI.
-Clutter (Sea, Land, Rain)
-Auto PRF select (user no longer have to specify PRF, the sheet will generate it instead based on target velocity or some general requirement like 95% visibility etc) It will instead prompt user to select “High, medium or low” PRF

Evaluation of clutter and signal processor is rather bit complex and specific as it may require user to actually specify some variables like target speed. The radar equation for those can also be no longer closed term, but rather have to be analyzed iteratively. It will be somewhat like this in appearance :

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This is a simplified model i use to estimate detect ability of target in sea clutter for an anti ship missile. The simplified equation is used and as seen the target is detectable in sea state 0-4 (i skipped sea state 1 as the base data i use for the clutter model is inaccurate) With doppler or MTI processing.

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Above is the example of rain clutter evaluation , as seen i need to specify detection range first.

The way of implementation i envisaged atm is to actually use the detection range from the calculation and later “evaluate” it using the user supplied “Processor improvement factor” to see if the radar can detect the target at specified range. If it cannot detect it then the sheet will look into similar signal strength to range table as i provided in the first image, then give range value where the signal strength exceeded the required threshold which in this sheet i would assume to be the same as one in thermal noise environment.