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FAA CARI-6 and CARI-7 are computer programs that allow you to precisely calculate the cosmic radiation dose. CARI-7 is the most recent and more advanced version of the software, but Leon is compatible with both versions.
CARI -6 can be downloaded by using this link.
CARI-7 can be found here: link.
Once saved and unpacked, read a file Readme where there are actions described step by step you should take.
To calculate cosmic radiation dose for Leon flights, export them from this page and use it as CARI input file.
Be aware that for precise calculation CARI needs actual heliocentric potencial that can be obtained here
The heliocentric potential enables the program to adjust for changes in galactic radiation levels that occur with changes in solar activity.