>From : http://www.trig-avionics.com/adsb.html
"What equipment do I need? To support ADS-B "Out", the aircraft must have a GPS receiver as the position source, and a datalink transmitter to actually send the ADS-B data. The datalink transmitter that most aircraft will use is a Mode S transponder, using a feature called "Extended Squitter". The Mode S transponder with Extended Squitter is the international standard for ADS-B output. Specific to US airspace - and not approved elsewhere - is the UAT datalink transmitter as an alternative to the Mode S transponder. UAT transmitters may only be used on GA aircraft flying at lower altitudes in the USA. The GPS receiver used must be an IFR certified receiver. Although that GPS is not required to be WAAS capable, that may be a moot point. Many legacy GPS receivers that were designed before ADS-B was planned do not include the necessary calculation of integrity and accuracy that ADS-B needs to operate. It is unlikely that these older devices can be upgraded, and therefore a new GPS receiver would be required. Most new GPS products today are WAAS capable." So if you need a transponder looks like a Mode S would be the one to look for, or stay out of A,B or C airspace. Rick Human N202RH Houston, Tx ____________________________________________________________________________ _______________ My understanding is that with the advent of ADS-B, transponders will become somewhat obsolete in a hurry, replaced by ADS-B hardware instead. _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
