Now that 17025 requires uncertainty for all measurements, how would I calculate the uncertainty for power splitter equivalent output reflection coefficient since it is calculated from two other measurements composed of magnitude and phase?

Now that 17025 requires uncertainty for all measurements, how would I calculate the uncertainty for power splitter equivalent output reflection coefficient since it is calculated from two other measurements composed of magnitude and phase?

If S22 = 0.25619, -0.71411

If S32 = 0.2482, -0.75531

Equivalent Output Reflection Coefficient = 0.0079921, 0.57

I was thinking it would just be a matter of doing an RSS of the reflection and transmission magnitude uncertainties, and phase uncertainties. Example 2: If using an 8753E, with an 85032F cal kit, the reflection unc. for a rho magnitude of 0.25 is 0.0063; the phase unc. is 1.476 deg. The transmission unc. for a magnitude of -12.04dB is 0.0558dB (or 0.0064 in linear terms), and the phase unc. is 0.4025 deg. When I RSS the values I get 0.00898 magnitude and 1.5299 degrees. Is that the correct approach?