FAQ’s

This list is for all Flight Hazards Forecast files in GIS Shapefile and GeoJSON format within the North American domain. To download the spreadsheet, click here Shapefile FILENAME GeoJSON FILENAME DESCRIPTION UNITS FORECAST INTERVAL LEVEL FH_NXGZIL00(md)(mh) JH_NXGZIL00(md)(mh) Large Aircraft Icing Forecast Light / Moderate / Severe 0 hour forecast All Levels Max Icing FH_NXGZIL01(md)(mh) JH_NXGZIL01(md)(mh)

DTN offers shapefiles with a lower polygon count. This list is for all North American Turbulence and Icing files in GIS Shapefile format with a polygon count under 8000. To download spreadsheet, click here Shapefile FILENAME GeoJSON FILENAME DESCRIPTION UNITS FORECAST INTERVAL LEVEL FG_NXGBTB00(md)(mh) JG_NXGBTB00(md)(mh) Eddy Dissipation Rate Turbulence EDR 0 hour forecast FL010 /

DTN offers shapefiles with a lower polygon count. This list is for Global Turbulence and Icing files in GIS Shapefile format with a polygon count under 8000. To download spreadsheet, click here Shapefile FILENAME GeoJSON FILENAME DESCRIPTION UNITS FORECAST INTERVAL LEVEL FG_WPGBTB03(md)(mh) JG_WPGBTB03(md)(mh) Eddy Dissipation Rate Turbulence EDR 3 hour forecast FL010 / 980hPa FG_WPGBTB04(md)(mh)

GIS Shapefile/GeoJSON List – Lower Polygon Count – Global Domain GIS Shapefile/GeoJSON List – Lower Polygon Count – North American Domain GIS Shapefile/GeoJSON List – North American Domain GIS Shapefile/GeoJSON List – Global Domain DTN’s Flight Hazard Data is also available as a contoured polygon shape file and in GeoJSON. There are several flight hazard

This is a list of all Flight Hazards Forecast files in GRIB2 format in the Global Domain. To download spreadsheet, click here FILENAME DESCRIPTION UNITS FORECAST INTERVAL FLIGHTLEVEL ATMOSPHERIC LEVEL HLYA10 Eddy Dissipation Rate Turbulence EDR 0 hour forecast FL530 100 hPa HLYA15 Eddy Dissipation Rate Turbulence EDR 0 hour forecast FL450 150 hPa HLYA16

This is a list of all Flight Hazards Forecast files in GRIB2 format in the North American Domain. To download the spreadsheet, click here FILENAME DESCRIPTION UNITS FORECAST INTERVAL FLIGHTLEVEL ATMOSPHERIC LEVEL HLDA10 Eddy Dissipation Rate Turbulence EDR 0 hour forecast FL530 100 hPa HLDA15 Eddy Dissipation Rate Turbulence EDR 0 hour forecast FL450 150

GRIB2 File List – North American Domain (EFH) GRIB2 File List – Global Domain (EFH) The new DTN Flight Hazards GRIB2 data has the following naming convention: Forecast Content Below is a summary of the flight hazards data content provided for each forecast period and for each grid, where:   Abbreviation Description Units Interval Turb

DTN RAMTAFs are text files which contain an encoded TAF with a newline as the line delimiter. File Description RAMTAFs files use the following naming convention: aaumssss.ARX Where: aa = Airline code uu = unit code AB = English units MM = Metric visibility ME = Metric visibility and knots for wind ssss = Station

Messages from the US FAA Air Traffic Control System Command Center (ATCSCC) include several important types of information: Airport and gate hold delays System administrative messages North Atlantic and North Pacific track information File Description Messages issued by the Air Traffic Control System Command Center are captured and distributed in files using the following naming

OPMET data, including METARs, TAFs, SIGMETs, and other operational meteorological information of interest to aviation users is collected by DTN from various sources around the world. This information is packaged into a single set of files, as described below. Both domestic US and international NOTAM files are sent in one of two types of files.