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Heathrow Trial of ADS-B Technologies for Surface Surveillance
In May 2002, National Air Traffic Services (UK) performed under contract to the EEC ADS Studies and Trials Project (ASTP) and assisted by ASTP staff a trial of three ADS-B technologies (namely 1090 MHz Extended Squitter, VDL Mode 4, and UAT) on the surface of Heathrow Airport. The three technologies were used concurrently and the objective was to compare their behaviour in an environment that should pose severe multi-path and blocking problems. A report has just been issued which presents the results of the analysis of measurements collected during this trial. The reported results indicate that VDL-4 provides (as expected) by far the best coverage, and it also appears to suffer less from multipath and interference problems. 1090 MHz ES appears to be the most sensitive link to such problems. Nevertheless performance in areas of good coverage is not significantly different between the three links.
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Seach words: GPC Systems International AB, GNSS-Transponder, GNSS Transponder, GP&C Transponder, GPS-Transponder, STDMA data link, SOTDMA, ICAO VDL Mode 2, ICAO VDL Mode 3, ICAO VDL Mode 4, ADS-B broadcast, Surveillance, Mode S Squitter, GPS-Squitter, AMASS, ASDE, TCAS, CDTI, DGPS, DGNSS, GBAS, LAAS, ICAO/AMCP, RTCA Task Force 3, Free Flight Steering Committee, Flight 2000, CNS/ATM, NEAN, NEAP, NAAN, FARAWAY, SUPRA, MAGNET-B, FREER, PETALII, 4S Transponder, AIS transponder, Håkan Lans, Hakan Lans, Melwyn Savio Pereira, http://www.gpc.se, http://www.gpc.se