Atmosphere Table
Altitude km |
0 |
20 |
50 |
70 |
80 |
90 |
100 |
110 |
120 |
Geopotential feet |
0 |
65411 |
162765 |
227158 |
259212 |
291162 |
323014 |
354767 |
386422 |
Pressure ATM |
1.000e-0 |
5.529e-2 |
7.874e-4 |
5.154e-5 |
1.039e-5 |
1.812e-6 |
3.159e-7 |
7.011e-8 |
2.505e-8 |
Density wrt surface |
1.000e-0 |
7.258e-2 |
8.383e-4 |
6.762e-5 |
1.507e-5 |
2.789e-6 |
4.575e-7 |
7.925e-8 |
1.814e-8 |
Pressure Pa |
1.013e+5 |
5.457e+3 |
7.978e+1 |
5.221e+0 |
1.052e+0 |
1.836e-1 |
3.201e-2 |
7.104e-3 |
2.538e-3 |
Density kg/m3 |
1.225e-0 |
8.891e-2 |
1.027e-3 |
8.283e-5 |
1.846e-5 |
3.416e-6 |
5.604e-7 |
9.708e-8 |
2.222e-8 |
Temperature K |
288.15 |
216.65 |
270.65 |
219.585 |
198.639 |
186.87 |
195.08 |
240 |
360 |
Gravity m/s2 |
9.8066 |
9.7452 |
9.6542 |
9.5942 |
9.5644 |
9.5348 |
9.5052 |
9.4759 |
9.4466 |
Pressure scale ht m |
8434.5 |
6381.6 |
8047.4 |
6569.9 |
5961.7 |
5636 |
6009 |
7723 |
12091 |
Molecular weight |
28.964 |
28.964 |
28.964 |
28.964 |
28.964 |
28.73 |
28.40 |
27.27 |
26.20 |
Mean free path m |
6.633e-8 |
9.139e-7 |
7.913e-5 |
9.810e-4 |
4.402e-3 |
2.37e-2 |
0.142 |
0.788 |
3.31 |
Speed of sound m/s |
340.29 |
295.07 |
329.80 |
297.06 |
282.54 |
275* |
283* |
320* |
400* |
Escape velocity m/s |
11173 |
11156 |
11129 |
11112 |
11103 |
11095 |
11086 |
11077 |
11069 |
minus rotation m/s |
10708 |
10689 |
10661 |
10642 |
10632 |
10623 |
10614 |
10604 |
10595 |
Mach # |
31.5 |
36.2 |
32.3 |
35.8 |
37.6 |
39 |
37 |
33 |
26 |
Therm Cond J/m-s-K |
2.536e-5 |
1.953e-5 |
2.397e-5 |
1.978e-5 |
1.800e-5 |
|
|
|
|
Ozone kg/m3 |
5.4e-8 |
3.80e-7 |
5.29e-9 |
4.3e-11 |
|
|
|
|
|
Water Vapor ppm |
4686 |
4.5 |
7.6 |
1.4 |
0.6 |
worst case thunderstorm, falls off above 30km |
|||
- most data from US Standard Atmosphere 1976, yellow book. * = estimate
- ozone from Table 18 page 38, water vapor from Table 21 page 44
table note b: "natural stratospheric source of water" Sissenwine 1968 J Atmo Sci 25,1129 / AFCRL-68-0550
- The heat capacity of air is around 1000J/kg-K, so it is proportional to density.
Escape velocity is relative to rotating earth
Higher Altitudes
Low Solar Activity |
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Altitude km |
100 |
120 |
150 |
200 |
250 |
300 |
400 |
500 |
600 |
700 |
800 |
1000 |
|||||||
Pressure Pa |
3.2e-2 |
2.5e-3 |
|||||||||||||||||
Density kg/m3 |
5.6e-7 |
2.2e-8 |
|||||||||||||||||
Temperature K |
195 |
360 |
|||||||||||||||||
Gravity m/s2 |
9.5 |
9.4 |
|||||||||||||||||
Pressure scale ht km |
6.01 |
12.09 |
|||||||||||||||||
Molecular weight |
28.4 |
26.2 |
|||||||||||||||||
Mean free path m |
0.142 |
3.31 |
|||||||||||||||||
Average Solar Activity |
|||||||||||||||||||
Altitude km |
100 |
120 |
150 |
200 |
250 |
300 |
400 |
500 |
600 |
700 |
800 |
1000 |
|||||||
Pressure Pa |
3.2e-2 |
2.5e-3 |
4.5e-4 |
8.5e-5 |
2.5e-5 |
8.8e-6 |
1.5e-6 |
3.0e-7 |
8.2e-8 |
3.2e-8 |
1.7e-8 |
7.5e-9 |
|||||||
Density kg/m3 |
5.6e-7 |
2.2e-8 |
2.1e-9 |
2.5e-10 |
6.1e-11 |
1.9e-11 |
2.8e-12 |
5.2e-13 |
1.1e-13 |
3.1e-14 |
1.1e-14 |
3.6e-15 |
|||||||
Temperature K |
195 |
360 |
634 |
855 |
941 |
976 |
996 |
999 |
1000 |
1000 |
1000 |
1000 |
|||||||
Gravity m/s2 |
9.51 |
9.45 |
9.36 |
9.22 |
9.08 |
8.94 |
8.68 |
8.43 |
8.19 |
7.95 |
7.74 |
7.32 |
|||||||
Pressure scale ht km |
6.01 |
12.09 |
23.38 |
36.18 |
44.92 |
51.19 |
59.68 |
68.78 |
88.24 |
130.6 |
193.9 |
288.2 |
|||||||
est.dens.scale.ht km |
|||||||||||||||||||
Molecular weight |
28.4 |
26.2 |
24.1 |
21.3 |
19.2 |
17.7 |
16.0 |
14.3 |
11.5 |
8.0 |
5.5 |
3.9 |
|||||||
Mean free path m |
0.142 |
3.31 |
33 |
240 |
890 |
2.6k |
16k |
77k |
280k |
730k |
1400k |
3100k |
|||||||
High Solar Activity |
|||||||||||||||||||
Pressure Pa |
3.2e-2 |
2.5e-3 |
|||||||||||||||||
Density kg/m3 |
5.6e-7 |
2.2e-8 |
|||||||||||||||||
Temperature K |
195 |
360 |
|||||||||||||||||
Gravity m/s2 |
9.51 |
9.45 |
|||||||||||||||||
Pressure scale ht km |
6.01 |
12.09 |
|||||||||||||||||
Molecular weight |
28.4 |
26.2 |
|||||||||||||||||
Mean free path m |
0.142 |
3.31 |
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