SUMMARY
We measured the concentration of radon from sea level to 5,000 meters
under different meteorological conditions.
Assuming that the radon is in
equilibrium with its daughters we can calculate the radon concentration from
that of the daughter products.
pnd
The sampling is carried out by aircraft with two different techniques.
1.
Stepwise sampling - The activity of the filter at the end of each
sampling gives the radon concentration at the designated altitude.
2.
Continuous sampling during climb and descent - A curve giving the
activity of the filter as a function of altitude is analyzed with a computer.
In most cases the variations are most marked in the lower levels, the
activity then falls off slowly with altitude.
Results can be interpreted ir
terms of the meteorological conditions corresponding to the different samples.