Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 4649

b) when on the surface (3.1.2.8.6.7), the transponder shall transmit extended 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 condition. 3.1.2.8.6.6 Register time-out. The transponder shall clear all 56-bits of the airborne position, surface position, squitter status and airborne velocity information transponder registers 05, 06, 07 and 09 {HEX} if these registers are not updated within two seconds of the previous update. This time-out shall be determined separately for each of these registers. Termination of extended squitter broadcast shall be as specified in Annex 10, Volume III, Part I. Note.— These registers are cleared to prevent the reporting of outdated position, velocity and squitter rate information. 3.1.2.8.6.7 Airborne/surface state determination. Aircraft with an automatic means of determining on-the-ground conditions shall use this input to select whether to report the airborne or surface message types. Aircraft without such means shall report the airborne type messages. Aircraft with or without such automatic on-the-ground determination shall use position message types as commanded by control codes in TCS (3.1.2.6.1.4.1 f)). After time-out of the TCS commands, control of airborne/surface determination shall revert to the means described above. Note.— Extended squitter ground stations determine aircraft airborne or surface status by monitoring aircraft position, altitude and ground speed. Aircraft determined to be on the ground that are not reporting the surface position message type will be commanded to report the surface format via TCS (3.1.2.6.1.4.1 f)). The normal return to the airborne position message type is via a ground command to report the airborne message type. To guard against loss of communications after take-off, commands to report the surface position message type automatically time-out. 3.1.2.8.6.8 Squitter status reporting. A GICB request (3.1.2.6.11.2) containing RR equals 16 and DI equals 7 and RRS equals 7 shall cause the resulting reply to contain the squitter status report in its MB field. 3.1.2.8.6.8.1 TRS, transmission rate subfield in MB. The transponder shall report the capability of the aircraft to automatically determine its surface squitter rate and its current squitter rate in this 2-bit (33, 34) subfield of MB. Note 1.— High and low squitter rate is determined on board the aircraft. Note 2.— The low rate is used when the aircraft is stationary and the high rate is used when the aircraft is moving. For details of how “moving” is determined, see Table 2-7 in Annex 10, Volume III, Part I, Appendix 1 to Chapter 5. Coding signifies no capability to automatically determine surface squitter rate signifies that the high surface squitter rate has been selected signifies that the low surface squitter rate has been selected unassigned 2007/70/II. szám Chapter 3 Annex 10 — Aeronautical Telecommunications 3-59 28/11/02 3.1.2.8.6.8.2 ATS, altitude type subfield in MB. The transponder shall report the type of altitude being provided in the airborne position extended squitter in this 1-bit (35) subfield of MB when the reply contains the contents of transponder register 07 {HEX}. Note.— For details of the contents of transponder registers 05 {HEX} and 07 {HEX} see Annex 10, Volume III, Part I, Appendix 1 to Chapter 5. 3.1.2.8.6.9 Surface squitter rate control. Surface squitter rate shall be determined as follows:

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