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Wasn't connected to the Internet during this weekend. Thought it would be
the provider as it happens here occasionally, but this time it was on my
side, a bad contact in the plug of the telephone line ...



In the meantime I programmed the density profile, you, Frank, proposed. I
see that there is still a more refined proposition in calculating the
densities by using the lapse rate of the standard atmosphere where one even
could introduce a modelled inversion.



But before going ahead using other atmospheric models, I really wanted to
validate the program itself by reproducing the values shown in the Auer
Standish paper, where they compare their results to analytical data and
achieve a one to one correspondence for the zenith angles between 15deg and
60deg. But unfortunately I was not able to reproduce these values to the
same accuracy level. Even introducing Simpson integration did not help.
Thought then that it could be due to an other misprint of one of the input
data. But also varying the input data, it is just not possible to achieve
the results in an accuracy level as shown. I am therefore wandering what
either they or we might have done different to what they describe in their
paper?



Marcel



P.S: Actually the second paper from Garfinkel (1967) contains also some
benchmarks for zenith angles between 85deg and 90deg.

   

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