DATATYPE_IONEX payload

Payload in IONEX 1.1 format

If you have requested DATATYPE_IONEX data from HERE GNSS API, you get a response where Message.data.data_type is DATATYPE_IONEX and data is in Message.data.payload.

The contents of the payload is global ionospheric map (GIM) in the IONEX 1.1 format, which is a text format.

GIM contains several TEC maps. Each map is created for a specific time. TEC values change relatively quickly, and each TEC map should not be used for more than 1-2 hours.

This example has been created by saving the beginning of the payload to a file. The full length of the ionospheric information is 65 kB.

  2021     3    11    15     0     0                        EPOCH OF FIRST MAP
  2021     3    11    16     0     0                        EPOCH OF LAST MAP
  3600                                                      INTERVAL
     2                                                      # OF MAPS IN FILE
  NONE                                                      MAPPING FUNCTION
    10.0                                                    ELEVATION CUTOFF
One-way carrier phase leveled to code                       OBSERVABLES USED
  6371.0                                                    BASE RADIUS
     2                                                      MAP DIMENSION
   450.0 450.0   0.0                                        HGT1 / HGT2 / DHGT
    87.5 -87.5  -2.5                                        LAT1 / LAT2 / DLAT
  -180.0 180.0   5.0                                        LON1 / LON2 / DLON
    -1                                                      EXPONENT
TEC/RMS values in 0.1 TECU; 9999, if no value available     COMMENT
                                                            END OF HEADER
     1                                                      START OF TEC MAP
  2021     3    11    15     0     0                        EPOCH OF CURRENT MAP
    87.5-180.0 180.0   5.0 450.0                            LAT/LON1/LON2/DLON/H
   51   51   51   52   52   53   53   53   54   54   55   55   56   56   57   57
   57   58   58   58   58   58   58   58   58   58   58   58   58   58   57   57
   57   56   56   56   55   55   54   54   53   53   52   52   51   51   51   50
   50   50   50   49   49   49   49   49   49   49   49   49   49   49   49   49
   49   49   49   49   49   50   50   50   51
    85.0-180.0 180.0   5.0 450.0                            LAT/LON1/LON2/DLON/H
   45   45   46   47   47   48   49   50   51   52   53   54   55   56   57   58
   59   59   60   60   61   61   61   61   61   61   61   61   61   60   60   59
   59   58   57   56   55   54   53   52   51   50   49   48   47   46   46   45
   45   44   44   44   44   43   43   43   43   43   43   43   43   43   43   43
   43   43   43   43   43   43   44   44   45
    82.5-180.0 180.0   5.0 450.0                            LAT/LON1/LON2/DLON/H
   36   37   38   39   40   42   43   45   47   49   50   52   54   55   56   58
   59   60   61   61   62   62   63   63   63   63   63   63   63   62   62   61
   60   59   58   56   55   53   51   50   48   46   44   43   42   41   40   39
   39   38   38   38   38   39   39   39   39   39   39   38   38   38   37   37
   37   36   36   36   35   35   36   36   36
    80.0-180.0 180.0   5.0 450.0                            LAT/LON1/LON2/DLON/H
   28   29   30   31   33   34   37   39   41   44   46   49   51   53   55   56
   58   59   60   61   62   63   63   64   64   64   65   65   65   64   64   63
   62   61   59   58   55   53   51   48   46   43   41   39   37   36   35   34
   34   34   34   34   35   35   36   36   36   36   36   35   35   34   33   32
   31   30   29   28   28   27   27   27   28

   ...

    -87.5-180.0 180.0   5.0 450.0                            LAT/LON1/LON2/DLON/H
   21   22   22   22   22   23   23   23   24   24   24   25   25   26   26   27
   27   27   28   28   28   29   29   29   29   29   30   30   30   30   30   30
   30   30   29   29   29   29   29   28   28   28   27   27   27   27   26   26
   26   25   25   25   24   24   24   23   23   23   22   22   22   22   22   21
   21   21   21   21   21   21   21   21   21

     2                                                      END OF TEC MAP
                                                            END OF FILE

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