Daily Global Ionosphere Maps GIM-Hc of Center-of-Mass of the ionosphere 
produced with IRI-PLas model ingesting JPL GPS TEC IONEX MAP      
Hc values in km. 
0, 1, ... , 23 Hours, UT.    
Geomagnetic coordinates:                       
    87.5 -87.5  -2.5    MLAT1/MLAT2/ DMLAT  
     0.0 360.0   5.0    MLON1/MLON2/ DMLON