Altimeter correction for cold ops
I would appreciate some guidance for the following typical winter ops in the USSR.!!!!
Gulfstream 550 operating into Estana: Temp -25c, pressure 1042, and almost sea level.
As an aside they were giving temp: fzra, 200mts rvr, and zero VV.
Cat 1 ILS, with say mins at 200ft.
Airport and aircraft CAT 2, but crew not current, and airport not declaring LVP.
All ops based on QNH, so no FMS complications.
What if any corrections should be added to the 200ft, for a) temperature, and b) pressure differences from ISA.
Many thanks, it was a cold Christmas there, as we managed to land, just on mins...(whatever they were!).
Temperature corrections are easy to locate and this was added, but I am concerned that there should also be a pressure difference correction.
glf