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Meteorology

Density altitude: we correct pressure altitude by 120 ft per degree of deviation

from standard:

13ºC – 11.8ºC = 1.2ºC 1.2 x 120 ft = 144 ft 1600 ft + 144 ft = 1744 ft

Here are some more tasks (answer key on next page):

1)
Airport elevation above MSL QNH Pressure altitude

2000 ft 1030

600 ft 997

1600 ft 1023

780 ft 1008

0 ft 1013

2) Airport elevation above MSL QNH Pressure altitude Temperature

2100 ft 983

2610 ft 1017

1240 ft 1021

3480 ft 996

Remember, at MSL the standard temperature is 15ºC, and the temperature

drops 2ºC for every 1000 ft we go up.

3)
Pressure altitude Temperature Density altitude

o
5000 ft -12 C

o
1000 ft 35 C

o
MSL 15 C

If it's warmer than expected at a certain altitude, 120 ft is added for each

degree. If it's colder, 120 ft are subtracted per degree.

Flight Theory PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 241