Does anyone have experience of the ILS G/S bringing you low on PAPIs? And if so is it worse than 3 reds?
It is a shame that other countries do not publish the minimum eye height of the PAPI, for example, Nice. Then you could determine why you cross the threshold at 100ft. In Australia the PAPI angle
and the Minimum Eye Height is published, so one can immediately determine whether the PAPI will indicate low if you are on the ILS GS (since the ILS GP generally has a TCH of 50ft, equating to a GPI of 290m along the runway).
Practically speaking, the PAPI visuals are so nebulous that only in the last couple of hundred feet can we notice a low PAPI indication, and that is with a ILS TCH of 50ft and a PAPI MEHt of 70-odd feet.