Tracking what is "normal" on cosmic radiation in the atmosphere

I have tried several times to find good data on what is normal in cosmic radation at altitudes (Airplane Flights).    And there is basically zero data out there.   Now I found this by following a user link at ENENEWS

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 I will  buy the app, and try it on a flight out of Hawaii.     

I will also put my geiger on a long duration count and then see how results compare.

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The TrackYourDose app was developed by Germany-based esooka.

It uses a mathematical model developed by scientists and meteorologists from the Physikalisch-Technische Bundesanstalt (PTB) in Germany and the University Oulu, Finland.

Since 1997, PTB has studied the cosmic radiation at typical flight altitudes and used this to calculate radiation levels.

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To to do this, PTB's scientists developed a carry-on 'flight case'.

Using the case, PTB's scientists measured more than 2,500 points at flight altitudes between 5 miles (8km) and 7.5 miles (12km) worldwide between 1997 and 2006.

This covered geographical location, the flight altitude and solar activity.  

http://www.dailymail.co.uk/sciencetech/article-3039806/How-radiation-exposed-fly-App-tracks-personal-dose-cosmic-radiation-air-travel.html