When we study about calibration, usually 12 error terms 8 error term are found along with various method like TRL , LRL , SOLT etc.
When we see any two port VNA we have a1,a2,b1,b2, r1, r2 . we need to calibrate using these terms only.
1. How can we find calibration parameters from the above 4 parameters (a1,b1, etc) like ESR，ESF ,ELF etc?