Example Earth Reference Atmosphere

Two columns:
  (1) Altitude above sea level (in km)
  (2) Mean mass density of air (in kg/m^3)

       0.0   1.2678E+00
       2.0   1.0117E+00
       4.0   8.1340E-01
       6.0   6.5615E-01
      10.0   4.1224E-01
      12.0   3.1158E-01
      16.0   1.6700E-01
      20.0   8.9578E-02
      24.0   4.7676E-02
      30.0   1.8516E-02
      40.0   4.1059E-03
      50.0   1.0933E-03
      60.0   3.3023E-04
      70.0   8.8452E-05
      80.0   2.0551E-05
      90.0   4.0433E-06
     100.0     6.03E-07
     110.0     1.08E-07
     120.0     2.44E-08
     130.0     8.47E-09
     140.0     3.84E-09
     150.0     2.06E-09
     160.0     1.24E-09
     180.0     5.44E-10
     200.0     2.78E-10
     250.0     7.21E-11
     300.0     2.40E-11
     350.0     9.90E-12
     400.0     3.69E-12
     500.0     6.89E-13
     600.0     1.45E-13
     800.0     1.17E-14
    1000.0     3.02E-15
    1500.0     5.28E-16
    2000.0     1.32E-16