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54 CGâcloud to ground lightning CONUSâcontinental United States DoDâDepartment of Defense EFIDSâelectronic flight information display EFMâelectric field mill FAAâFederal Aviation Administration GLMâgeostationary lightning mapper GPSâglobal positioning system ICâinter- and intra-cloud IRâinfrared ITWSâintegrated terminal weather system JDPOâJoint Planning and Development Office LDSSâlightning decision support system LFâlow frequency LISâlightning imaging sensor MADSâmaster alarm distribution system MDFâmagnetic direction finding MFâmedium frequency NASAâNational Aeronautics and Space Administration NCARâNational Center for Atmospheric Research NLDNâNational Lightning Detection Network NOAAâNational Oceanic and Atmospheric Administration NTSBâNational Transportation Safety Board OCCâoperations control center OSHAâOccupational Safety and Health Administration OTDâoptical transient detector PLWSâPrecision Lightning Weather System RADâremote alarm display RFâradio frequency TDWRâTerminal Doppler Weather Radar TOAâtime of arrival TRACONâterminal radar control center USPLNâU.S. Precision Lightning Network VHFâvery high frequency VLFâvery low frequency WSSDMâWeather Support for Deicing Decision Making Abbreviations