In the air, as you fly along and encounter nonstandard temperatures, indicated altitude can differ from true altitude. ... When the temperature is colder than standard, you are at an altitude lower than your altimeter indicates. @ temperature warmer than standard, you are higher than your altimeter indicates. ...................... In such conditions, an approximate correction is 4 per cent height increase for every 10°C below standard temperature as measured at the altimeter setting source. This is safe for all altimeter setting source altitudes for temperatures above –15°C. 4.3.2 Tabulated corrections

http://code7700.com/altimeter_temperature_correction.htm#correction https://en.wikipedia.org/wiki/Altimeter

..... -10,210 is in error .....

otherwise formulated

'h' NASA(kPa) altitude

't' local °C from Pt sensor

p[kPa] from altimeter

raw altimeter reading

... flight altitude [m]

't' [°C]from the airport "OR" as measured at aircraft approaching landing runway.

Altimeter reading from sensed kPa

'x' direction

'y'

add[m]Alti'r reading

subtract[m]Alt'r reading

..... More bed time reading .....

https://www.faa.gov/regulations_policies/handbooks_manuals/ aviation/phak/media/10_phak_ch8.pdf