[teleforce]

To be fair he did point to the more details for another article from the company website [1].

Since according to Einstein "you can make it simpler but no simpler", me think he and his colleague did pretty well there if we refer to the reduced complexity equation provided here [2]. To be honest this simplified coherence estimation equation in words literally looks like the most complicated equation in words that I have ever seen (page 34 in [2]) - imagine the details elaboration for the mathematical equations but bear in mind that this is for the more sophisticated multi-static radar:

Coherence Estimation = [Radar equation system noise (gammaSNR)] x [Quanization Noise (gammaQuant)] x [Ambiguities (gammaAmb)] x [Baseline Decorrelation(gammaGeo) x [Doppler Decorrelation(gammaAz)] x [Volume Decorrelation(gammaVol)] x [Temporal Decorrelation(gammaTemp)] x [Processing & Coregistration Errors(gammaProc)]

[1]https://www.capellaspace.com/sar-101-an-introduction-to-synt...

[2]https://elib.dlr.de/43805/1/eusar06_tutorial_advanced_bistat...