U.S Standard Atmosphere
Properties of US standard atmosphere, -5.000 to 250.000 ft altitude
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The standard atmosphere can be regarded as the average pressure, temperature and air density for various altitudes. The US Standard Atmosphere 1976 is an average, piece-wise continuous, mid-latitude temperature profile of the earth's atmosphere. It is defined as having a temperature of 288.15 K at the the sea level - 0 km geopotential height = 1013.25 hPa.
The atmosphere can be divided in the
- Troposphere ranging from 0 to 11 km (36.000 ft) altitude
- Stratosphere ranging from 11 to to 51 km (167.000 ft) altitude
- Mesosphere ranging from 51 to 71 km (232.000 ft) altitude
With the atmosphere air properties table - the temperature, pressure, acceleration of gravity, absolute pressure, density and viscosity can be determined at different altitudes.
U.S Standard Atmosphere Air Properties in Imperial (BG) Units
| Geo potential Altitude above Sea Level - h - (ft) |
Temperature - t - (oF) |
Acceleration of Gravity - g - (ft/s2) |
Absolute Pressure - p - (lb/in2) |
Density - ρ - 10-4 (slugs/ft3) |
Dynamic Viscosity - μ - 10-7 (lb.s/ft2) |
| -5000 | 76.84 | 32.189 | 17.554 | 27.45 | 3.836 |
| 0 | 59 | 32.174 | 14.696 | 23.77 | 3.737 |
| 5000 | 41.17 | 32.159 | 12.228 | 20.48 | 3.637 |
| 10000 | 23.36 | 32.143 | 10.108 | 17.56 | 3.534 |
| 15000 | 5.55 | 32.128 | 8.297 | 14.96 | 3.430 |
| 20000 | -12.26 | 32.112 | 6.759 | 12.67 | 3.324 |
| 25000 | -30.05 | 32.097 | 5.461 | 10.66 | 3.217 |
| 30000 | -47.83 | 32.082 | 4.373 | 8.91 | 3.107 |
| 35000 | -65.61 | 32.066 | 3.468 | 7.38 | 2.995 |
| 40000 | -69.70 | 32.051 | 2.730 | 5.87 | 2.969 |
| 45000 | -69.70 | 32.036 | 2.149 | 4.62 | 2.969 |
| 50000 | -69.70 | 32.020 | 1.692 | 3.64 | 2.969 |
| 60000 | -69.70 | 31.990 | 1.049 | 2.26 | 2.969 |
| 70000 | -67.42 | 31.959 | 0.651 | 1.39 | 2.984 |
| 80000 | -61.98 | 31.929 | 0.406 | 0.86 | 3.018 |
| 90000 | -56.54 | 31.897 | 0.255 | 0.56 | 3.052 |
| 100000 | -51.10 | 31.868 | 0.162 | 0.33 | 3.087 |
| 150000 | 19.40 | 31.717 | 0.020 | 0.037 | 3.511 |
| 200000 | -19.78 | 31.566 | 0.003 | 0.0053 | 3.279 |
| 250000 | -88.77 | 31.415 | 0.000 | 0.00065 | 2.846 |
U.S Standard Atmosphere Air Properties in SI Units
| Geo potential Altitude above Sea Level - h - (m) |
Temperature - t - (oC) |
Acceleration of Gravity - g - (m/s2) |
Absolute Pressure - p - 104 (N/m2) |
Density - ρ - 10-1 (kg/m3) |
Dynamic Viscosity - μ - 10-5 (N.s/m2) |
| -1000 | 21.50 | 9.810 | 11.39 | 13.47 | 1.821 |
| 0 | 15.00 | 9.807 | 10.13 | 12.25 | 1.789 |
| 1000 | 8.50 | 9.804 | 8.988 | 11.12 | 1.758 |
| 2000 | 2.00 | 9.801 | 7.950 | 10.07 | 1.726 |
| 3000 | -4.49 | 9.797 | 7.012 | 9.093 | 1.694 |
| 4000 | -10.98 | 9.794 | 6.166 | 8.194 | 1.661 |
| 5000 | -17.47 | 9.791 | 5.405 | 7.364 | 1.628 |
| 6000 | -23.96 | 9.788 | 4.722 | 6.601 | 1.595 |
| 7000 | -30.45 | 9.785 | 4.111 | 5.900 | 1.561 |
| 8000 | -36.94 | 9.782 | 3.565 | 5.258 | 1.527 |
| 9000 | -43.42 | 9.779 | 3.080 | 4.671 | 1.493 |
| 10000 | -49.90 | 9.776 | 2.650 | 4.135 | 1.458 |
| 15000 | -56.50 | 9.761 | 1.211 | 1.948 | 1.422 |
| 20000 | -56.50 | 9.745 | 0.5529 | 0.8891 | 1.422 |
| 25000 | -51.60 | 9.730 | 0.2549 | 0.4008 | 1.448 |
| 30000 | -46.64 | 9.715 | 0.1197 | 0.1841 | 1.475 |
| 40000 | -22.80 | 9.684 | 0.0287 | 0.03996 | 1.601 |
| 50000 | -2.5 | 9.654 | 0.007978 | 0.01027 | 1.704 |
| 60000 | -26.13 | 9.624 | 0.002196 | 0.003097 | 1.584 |
| 70000 | -53.57 | 9.594 | 0.00052 | 0.0008283 | 1.438 |
| 80000 | -74.51 | 9.564 | 0.00011 | 0.0001846 | 1.321 |
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