Just noticed some columns seem to be shifted for the Slovak radars but that is a problem in the source data ( http://eumetnet.eu/wp-content/themes/aeron-child/observations-programme/current-activities/opera/database/OPERA_Database/OPERA_RADARS_ARH_DB.json , gain beam and frequency column for radar 11958 & 11812 WMO code). If the values would be shifted the numbers would be more logical