Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 2312

b) when on the surface (3.1.2.8.6.7), the transponder shall transmit acquisition squitters under control of SAS (3.1.2.6.1.4.1 f)). In the absence of any SAS commands, use of the top antenna only shall be the default. Note.— Acquisition squitters are not emitted on the surface if the transponder is reporting the surface type of extended squitter (3.1.2.8.6.4.3). 3.1.2.8.6 EXTENDED SQUITTER, DOWNLINK FORMAT 17 DF CA AA ME PI Note.— SSR Mode S transponders transmit extended squitters to support the broadcast of aircraft-derived position for surveillance purposes. The broadcast of this type of information is a form of automatic dependent surveillance (ADS) known as ADS-broadcast (ADS-B). 3.1.2.8.6.1 Extended squitter format. The format used for the extended squitter shall be a 112-bit downlink format (DF = 17) containing the following fields: Field Reference DF downlink format 3.1.2.3.2.1.2 CA capability 3.1.2.5.2.2.1 AA address, announced 3.1.2.5.2.2.2 ME message, extended squitter 3.1.2.8.6.2 PI parity/interrogator identifier 3.1.2.3.2.1.4 The PI field shall be encoded with II equal to 0. 3.1.2.8.6.2 ME: Message, extended squitter. This 56-bit (33-88) downlink field in DF = 17 shall be used to transmit broadcast messages. Extended squitter shall be supported by registers 05, 06, 07, 08, 09, 0A {HEX} and 61-6F {HEX} and shall conform to either version 0 or version 1 message formats as described below:

Source: https://magyarkozlony.hu/hivatalos-lapok/bfd0d67db9f223889f627fd618725b03526630e2/dokumentumok/d5234fd7275da04023366ab8a434989962a31bdf/letoltes