36 1001 De Rudder, Anne Rutherford Appleton Laboratory, Chilton OX11 0QX, UK - Tel.: +44 (0) 1235 445837 US Standard Atmosphere 1976 NERC Data Grid (NDG) project 2 13 1976 01 01 2002 10 30 5 Altitude (km) 2 1.E+12 1 1.E+08 1000 Total concentration (cm-3) Temperature (degrees K) 8 Example of FFI 1001 (b). This example illustrating NASA Ames file format index 1001 is based on the US Standard Atmosphere 1976 as quoted in G. Brasseur and S. Solomon, Aeronomy of the Middle Atmosphere, Reidel, 1984 (p. 46). It provides typical values of middle latitude averaged air concentration and temperature as a function of height (expressed here as the altitude above sea level). The first date on line 7 (1st of January 1976) is fictitious since the parameters are yearly averages. We have inserted 1 additional line into the original table (at 125 km altitude), to illustrate the use of the "missing value" flags (see line 12). 12 The files included in this data set illustrate each of the 9 NASA Ames file format indices (FFI). A detailed description of the NASA Ames format can be found on the Web site of the British Atmospheric Data Centre (BADC) at http://www.badc.rl.ac.uk/help/formats/NASA-Ames/ E-mail contact: badc@rl.ac.uk Reference: S. E. Gaines and R. S. Hipskind, Format Specification for Data Exchange, Version 1.3, 1998. This work can be found at http://cloud1.arc.nasa.gov/solve/archiv/archive.tutorial.html and a copy of it at http://www.badc.rl.ac.uk/help/formats/NASA-Ames/G-and-H-June-1998.html Altitude Concentration Temperature (km) (cm-3) (K) 0 2.55E+07 288 5 1.53E+07 256 10 8.61E+06 223 15 4.04E+06 217 20 1.85E+06 217 25 8.33E+05 222 30 3.83E+05 227 35 1.74E+05 237 40 6.67E+04 250 45 4.12E+04 264 50 2.14E+04 271 55 1.19E+04 261 60 6.45E+03 247 65 3.42E+03 233 70 1.71E+03 220 75 8.36E+02 208 80 4.03E+02 198 85 1.72E+02 189 90 6.98E+01 187 95 2.93E+01 188 100 1.19E+01 195 105 5.20E+00 209 110 2.14E+00 240 115 9.66E-01 300 120 5.03E-01 360 125 1.E+08 1000