The values of the AE, AU, AL, AO indices are calculated and made available by 
the World Data Center for Geomagnetism, Kyoto, JAPAN.

Citation: 
World Data Center for Geomagnetism, Kyoto, Nose M., Iyemori T., Sugiura M. and Kamei T. 
(2015) - Geomagnetic ÀÅ index, doi:10.17593/15031-54800.


Format description for minute values of AE, AU, AL, AO indices

     The following is the logical record format for the AE, AU, AL and AO Indices.  
     The logical record is 400 bytes.  

      Positions
     From    To      Short Description
=====================================================================================
        1    12      Filler (identifier) value 'AEALAOAU    '
       13    14      The last two digits of the Year
       15    16      Month '01' to '12'
       17    18      Day of the Month '01' to '31'
       19            Component 'E' for AE /'L' for AL /'O' for AO/'U' for AU
       20    21      Hour UT '00' to '23'
       22    24      Name of the index 'AE'/'AL'/'AO'/'AU'
       25    34      Filler (Edition number) value 'KYOTO/E02 ' for final 
                                               and 'PRVAE/E02 ' for provisional data
       35   394      60 one minute values, unit 1nT. Value ' 99999' for the missing data
                            ( 35 40 One minute value for the first minute of the hour)
                            (389 394 One minute value for the last minute of the hour)                    
      395   400      Hourly mean value. Value ' 99999' for the missing data

=====================================================================================