= 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/m^3^ || 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/m^3^ || 5.4e-8 || 3.80e-7 || 5.29e-9 || 4.3e-11 || || || || || ||
|| Water Vapor ppm || 4686 || 4.5 || 7.6 || 1.4 || 0.6 ||<-4:> 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 [[ https://journals.ametsoc.org/jas/article-pdf/25/6/1129/3416466/1520-0469(1968)025_1129_mlhtk_2_0_co_2.pdf | J Atmo Sci 25,1129 ]] / [[ https://apps.dtic.mil/sti/pdfs/AD0679996.pdf | 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
[[attachment:EarthScaleHt.png | {{attachment:EarthScaleHt.png}} ]]
=== Higher Altitudes ===
||<-20> Low Solar Activity ||
|| Altitude km || 100 || 120 || 150 || 200 || 250 || 300 || 400 || 500 || 600 || 700 || 800 || 1000 ||
|| Pressure Pa || 3.2e-2|| 2.5e-3||
|| Density kg/m^3^ || 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 ||
||<-20> 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/m^3^ ||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 ||
||<-20> High Solar Activity ||
|| Pressure Pa ||3.2e-2 ||2.5e-3 ||
|| Density kg/m^3^ ||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||