abstract:The VHF Data Link or VHF Digital Link (VDL) is a means of sending information between aircraft and ground stations (and in the case of VDL Mode 4, other aircraft). Aeronautical VHF data links use the band 117.
The NORMARC 8005 SCAT-I ground station receivesandvalidatesGPSsignals and thentransmitsthe calculatedsignalcorrectionsand flight pathdatavia aVHFdatalink.