| |
Tabelle
meteo |
| Calcolo
del QNH
Atmosfera tipo
Livelli standard
|
CALCOLO DEL QNH 
QNH
= A + B * QFE
|
ALTITUDINE
|
A
|
B
|
|
0
|
0
|
1
|
|
50
|
1.14
|
1.00481
|
|
100
|
2.29
|
1.00966
|
|
150
|
3.43
|
1.01453
|
|
200
|
4.57
|
1.01943
|
|
250
|
5.71
|
1.02437
|
|
300
|
6.86
|
1.02932
|
|
350
|
8
|
1.03431
|
|
400
|
9.14
|
1.03933
|
|
450
|
10.29
|
1.04438
|
|
500
|
11.43
|
1.04945
|
|
550
|
12.57
|
1.05457
|
|
600
|
13.71
|
1.05971
|
|
650
|
14.86
|
1.06489
|
|
700
|
16
|
1.07009
|
|
750
|
17.14
|
1.07532
|
|
800
|
18.29
|
1.08058
|
|
850
|
19.43
|
1.08588
|
|
900
|
20.57
|
1.09122
|
|
950
|
21.71
|
1.09658
|
|
1000
|
22.86
|
1.10198
|
|
|
|
ATMOSFERA TIPO O STANDARD (ICAO)
| Altitudine
metri |
Temperatura
°C |
Pressione
hPa |
Differenza per 1000 metri
hPa |
Densità
Kg massa/m^3 |
| 0 |
15.0 |
1013.2 |
114.5 |
1.225 |
| 1000 |
8.5 |
898.7 |
103.8 |
1.112 |
| 2000 |
2.0 |
794.9 |
93.8 |
1.006 |
| 3000 |
-4.5 |
701.1 |
84.7 |
0.909 |
| 4000 |
-11.0 |
616.4 |
76.2 |
0.819 |
| 5000 |
-17.5 |
540.2 |
68.4 |
0.736 |
| 6000 |
-24.0 |
471.8 |
61.2 |
0.660 |
| 7000 |
-30.5 |
410.6 |
54.6 |
0.589 |
| 8000 |
-37.0 |
356.0 |
48.6 |
0.525 |
| 9000 |
-43.5 |
307.4 |
43.1 |
0.466 |
| 10000 |
-50.0 |
264.3 |
38.0 |
0.413 |
| 11000 |
-56.5 |
229.3 |
33.0 |
0.364 |
| 12000 |
-56.5 |
193.3 |
|
0.311 |
|
| |
LIVELLI STANDARD
| Pressione
hPa |
Altitudine
metri |
Altitudine
Feet |
Temperatura
Standard °C |
| 1000 |
111 |
364 |
14.3 |
| 850 |
1457 |
4781 |
5.5 |
| 700 |
3012 |
9882 |
-4.6 |
| 500 |
5574 |
18289 |
-21.2 |
| 400 |
7185 |
23574 |
-31.7 |
| 300 |
9164 |
30065 |
-44.6 |
| 200 |
11784 |
38662 |
-56.5 |
| 100 |
16180 |
53083 |
-56.5 |
| 50 |
20576 |
67507 |
-55.9 |
| 30 |
23849 |
78244 |
-52.7 |
| 20 |
26481 |
86881 |
-50.0 |
| 10 |
31055 |
101885 |
-45.4 |
|
