Hello.
Very detailed summary, thank you!
Even tho I have been flying for a while on Airbus, I’m still unclear about the difference between these 2 —>
3IRS/GPS <===== 3 IRs are available and being mixed with the selected GPIRS to compute the FM position, this is GPS PRIMARY
GPIRS = 3308.9N / 00754.9E <===== The current selected ADIRU GPIRS that is being used by the FMGC to be mixed with the MIX IRS position)
3IRS/GPS: Is it combined with both GPS? If not then what is the difference with FMGC1 or FMGC2 position as my understanding each FMGC uses a mix of 3 IRS + GPS1 for FMGC1 and GPS 2 for FMGC2.
GPRIS: “Current selected ADIRU GPRIS”? Don’t they always use all 3 IRS and one GPS to compute FMGC position?