Minimum Aviation System Performance Standards for Aircraft ...

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62 © 20xx, RTCA, Inc. i. Lighter-than-air j. Unmanned Aerial vehicle k. Space/Trans-atmospheric vehicle l. Ultralight / Hang glider / Paraglider m. Parachutist/Skydiver n. Surface Vehicle – emergency vehicle o. Surface Vehicle – service vehicle p. Point obstacle (includes tethered balloons) q. Cluster obstacle r. Line obstacle Notes: 1. ICAO Medium aircraft – 7,000 to 136,000 kg (15,500 to 300,000 lbs) can be represented as either small or large aircraft as defined above. 2. Obstacles can be either fixed or movable. Movable obstacles would require a position source. 3. Weights given for determining participant categories are maximum gross weights, not operating weights. 4. The following category code assignments should be considered for aircraft operating in the United States national air space (NAS). Light : Less than 7,000 kg (15,500 lb) 3.2.2.4 Mode 3/A Code Small: ≥ 15,500 and < 41,000 lb Large: ≥ 41,000 lb and < 255,000 lb and not in “High Vortex Large” category High Vortex Large: Certain other aircraft, including B-757 Heavy: ≥ 255,000 lb Since the Mode 3/A code is utilized by many Ground ATC systems for aircraft identification, it may continue to be necessary for ADS-B participants in certain airspace to transmit the Mode 3/A code. ADS-B shall (New Reqmt) have the capability to transmit the Mode 3/A code. 3.2.3 A/V Length and Width Codes The A/V length and width codes describe the amount of space that an aircraft or ground vehicle occupies and are components of the Mode Status report (§3.5.4, §3.5.4.6). The
3.2.4 Position aircraft length and width codes are not required to be transmitted by all ADS-B participants all of the time. However, they are required (§3.5.4.6) to be transmitted by aircraft above a certain size, at least while those aircraft are in the airport surface movement area. Position information shall (242AR2.14) be transmitted in a form that can be translated, without loss of accuracy and integrity, to latitude, longitude, geometric height, and barometric pressure altitude. The position report elements may be further categorized as geometric position and barometric altitude. • The geometric position report elements are horizontal position (latitude and longitude), and geometric height. All geometric position elements shall (242AR2.15) be referenced to the WGS-84 ellipsoid. • Barometric pressure altitude shall (242AR2.16) be reported referenced to standard temperature and pressure. For any ADS-B participant that sets the “reporting reference point position” CC code (in MS report element #7g, §3.5.4.9.7) to ONE, the position that is broadcast in ADS-B messages as that participant’s nominal position shall (242AR2.17) be the position of that participant’s ADS-B position reference point (§3.3.4.1 below). For any ADS-B participant that sets the “reporting reference point position” CC code (in MS report element #7g, §3.5.4.9.7) to ZERO, the position that is broadcast in ADS-B messages is not corrected from the position as given by the participant’s navigation sensor to the position of that participant’s ADS-B position reference point. Note: Surface movement and runway incursion applications will require high NACP values. To obtain those high values, it may be necessary to correct the reported position to that of the ADS-B Position Reference Point (§3.3.4.1) if the antenna of the navigation sensor is not located in very close proximity to the ADS-B reference point. 3.2.4.1 ADS-B Position Reference Point The nominal location of a transmitting ADS-B participant – the position that is reported to user applications in SV reports about that participant – is the location of the participant’s ADS-B Position Reference Point. Note 1: The “reporting reference point position” CC code (in MS report element #7g) indicates whether a transmitting ADS-B participant has corrected the position given by its navigation sensor (e.g., the position of the antenna of a GPS receiver) to the location of its ADS-B position reference point. (The process of correcting the position to that of the position reference point need not be done in the transmitting ADS-B subsystem; it might be applied in the navigation sensor, or in another device external to the ADS-B transmitting subsystem.) (See the description of MS report element #7g, §3.5.4.9.7) © 20xx, RTCA, Inc. 63
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FOREWORD This document was prepared
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TABLE OF CONTENTS 1 PURPOSE AND SCO
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3.3.23 Selected Heading Sign Field.
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LIST OF TABLES Table 2-5: High Leve
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2 © 20xx, RTCA, Inc. C: Derivation
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4 1.2.3 ASA Architecture © 20xx, R
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6 © 20xx, RTCA, Inc. The TCAS traf
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8 © 20xx, RTCA, Inc. DO-3xx ADS-B
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10 1.3.1.4 Basic Surface Situationa
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Page 72 and 73: 60 3.2.2 Identification 3.2.2.1 Cal
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Page 78 and 79: 66 3.2.4.2 Altitude © 20xx, RTCA,
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Page 86 and 87: 74 © 20xx, RTCA, Inc. Table 3.2.9.
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Page 100 and 101: 88 3.4.1.1 Definitions © 20xx, RTC
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3.5.1.2 ADS-B Message Exchange Tech
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3.5.1.3.12 Heading While on the Sur
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3.5.1.4 Mode Status Report © 20xx,
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3.5.1.4.9 Capability Class (CC) Cod
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3.5.1.4.15 Geometric Vertical Accur
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3.5.1.6.2 ARV Report Update Require
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© 20xx, RTCA, Inc. Whereas ADS-B r
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4 ADS-B IN System Applications Requ
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© 20xx, RTCA, Inc. Broadcast (ADS-
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Appendix A Page A-2 ©20xx, RTCA, I
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Appendix A Page A-8 A.2 Definitions
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Appendix A Page A-10 Air/Ground Sta
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Appendix A Page A-12 Collision Avoi
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Appendix A Page A-14 Extended Displ
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Appendix A Page A-16 Latency Compen
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Appendix A Page A-18 Regime - Divis
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Appendix A Page A-20 TCAS Potential
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Appendix B Bibliography
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B Bibliography Appendix B Page B-1
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Appendix B Page B-3 Name Reference
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