Daily Global Ionosphere Maps GIM-foF2 of the F2 layer critical frequency 
produced with IRI-PLas model ingesting JPL / UPC GIM-TEC IONEX MAP      
foF2 values in 0.1 MHz.
0, 1, ... , 23 Hours, UT.    
Geographic coordinates:                       
   87.5 -87.5  2.5    LAT1/ LAT2/ DLAT	     
 -180.0 180.0  5.0    LON1/ LON2/ DLON	     

(1) YRMNDDf.zip : JPL <jplr> GIM-TEC based       
    foF2-index values 
    0, 1, ... , 23 Hours, UT.    
(2) YRMNDDf_15m.zip : UPC <uadg> GIM-TEC based
    foF2-index values. 
    00:00, 00:15, 00:30, 00:45, 01:00, ... , 23:45 Hours-15min, UT.