SkyView - Dynon Avionics

Appendix C: Wiring and Electrical Connectionstransmission time of the position data from the GPS to the transponder to determine theoverall latency.ADS-B Service LevelsADS-B forms part of the future plans for airspace management, and is being deployed in certainlimited applications. The following summary of the ADS-B service is current at the date ofpublication of this manual, but you should be aware that regulatory changes are taking place inthis area, and the most recent regulatory information should be consulted.There are currently three levels of service that an ADS-B transmitter can provide.Operational ADS-BSurveillanceExperimental ADS-BSurveillanceADS-B InformationEASA has published the certification requirements forusing ADS-B position information for Air TrafficControl services in a non-radar environment, AMC20-24. AMC20-24 includes both technical attributes ofthe individual components of an installation andsystem attributes for the overall aircraft installation.AMC20-24 has been adopted as a base standard forADS-B surveillance in other parts of the world, andprovides radar-like separation capabilities betweenparticipating IFR aircraft.ADS-B trials have taken place in a number ofcountries which, because of the experimental nature,have allowed deviations from the operationalstandards represented by AMC20-24, but which havebeen based on positional information withcomparable integrity.There are a number of non-certified applications ofADS-B technology such as fleet monitoring and trafficawareness which can be deployed using positionsources of lower integrity which, because theintegrity is reported in the transmissions, are alsocompatible with the ADS-B surveillance environment.There is also a widely publicised fourth level of service in discussion which is the US “NextGeneration” plan, but at the time of publication of this manual a number of key aspects of thisare undefined and no compliance statement against that future plan is practical.The SV-XPNDR-26X is designed to provide all of the required parameters listed in AMC20-24.However, in order to be used for separation services AMC20-24 sets additional criteria relatedto the position accuracy and integrity of the GPS position source used, and the ability for theGPS to communicate those accuracy and integrity parameters to the ADS-B output system inthe transponder. At the publication date of this manual, the only commercially available GPS17-16 SkyView System Installation Guide - Revision J