Interim Guidance for UAT Avionics Operating with Safe Flight 21 ...

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2.3.3.1 Textual METAR and TAF Products ....................................................................................18 2.3.3.2 NEXRAD Graphic Product.................................................................................................18 2.3.4 FUTURE PRODUCTS...............................................................................................................18 3 REPORT INTERFACE GUIDANCE .................................................................................... 19 3.1 BACKGROUND ....................................................................................................................... 19 3.2 COMPOSING “REPORTS”....................................................................................................... 19 3.3 REPORT PACKET FORMAT...................................................................................................... 19 3.4 LINK LAYER........................................................................................................................... 20 3.4.1 FLAG FIELD ..........................................................................................................................21 3.4.2 ADDRESS FIELD.....................................................................................................................21 3.4.3 LINK CONTROL FIELD ...........................................................................................................21 3.4.4 INFORMATION FIELD ............................................................................................................21 3.4.5 FRAME CHECK SEQUENCE.....................................................................................................21 3.4.6 EXAMPLE LINK LAYER FRAME FORMAT................................................................................22 4 DISPLAY INTERFACE GUIDANCE .................................................................................... 23 4.1 CONSIDERATIONS FOR DISPLAY OF TRAFFIC.......................................................................... 23 4.1.1 ASSOCIATING ADS-B AND TIS-B REPORTS...........................................................................23 4.1.2 RECOMMENDATIONS FOR TRAFFIC SYMBOLOGY AND UPDATING...........................................23 4.1.3 SPECIAL CONSIDERATIONS FOR TIS-B TRAFFIC .....................................................................24 4.1.3.1 Spatial and Temporal Redundancy of Uplinked TIS-B Messages ...........................................24 4.1.3.2 Providing the Pilot an Indication of TIS-B Service Status.......................................................25 4.1.3.2.1 TIS-B Signaling ...............................................................................................................25 4.1.3.2.2 Avionics Processing to Determine TIS-B Service Status ....................................................26 4.1.3.2.3 Additional Points Relative to TIS-B Service Status.............................................................28 4.2 CONSIDERATION FOR PROCESSING AND DISPLAY OF FIS-B PRODUCTS................................. 29 5 ACRONYMS........................................................................................................................... 30 TABLE OF FIGURES Figure 1-1: Information Flow Context Diagram.....................................................................................8 Figure 2-1: Decomposition of the Ground Uplink Message Payload...................................................... 15 Figure 3-1: Example Link Layer Frame Format for UAT Report Interface ........................................... 22 Figure 4-1: Illustration of TIS-B Service Status ................................................................................... 27 Figure 4-2: TIS-B Customer Leaving Service Through Floor of Radar Coverage................................... 27 Figure 4-3: Avionics Processing Logic to Support the TIS-B Service Status Indication........................... 28 TABLE OF TABLES Table 2-1: Frame Structure................................................................................................................ 16 Table 2-2: Frame Types .................................................................................................................... 16 ii
Table 3-1: Report Packet Format....................................................................................................... 20 Table 3-2: Report Packet Types......................................................................................................... 20 Table 3-3: Typical HDLC Link Layer Frame Format........................................................................... 21 Table 4-1: Format of Individual TIS-B Signal...................................................................................... 26 Table 4-2: TIS-B Service Status Indications........................................................................................ 26 iii
Page 1 and 2: RTCA Paper No. 053-04/SC186-221 Int
Page 3: TABLE OF CONTENTS 1 INTRODUCTION ..
Page 7 and 8: 1 Introduction 1.1 Background The F
Page 9 and 10: 1.4 Operational Application of Broa
Page 11 and 12: Note: The Surveillance Transmit Pro
Page 13 and 14: applications. Terrain information,
Page 15 and 16: 2 UAT Air Interface 2.1 Waveform Ai
Page 17 and 18: 8 bytes UAT -Specific Header I-Fram
Page 19 and 20: When the Frame Type is the binary v
Page 21 and 22: 3 Report Interface Guidance 3.1 Bac
Page 23 and 24: discussed in the following subsecti
Page 25 and 26: 4 Display Interface Guidance This s
Page 27 and 28: • For repeat transmissions, there
Page 29 and 30: Figure 4-1 illustrates the conditio
Page 31 and 32: Note: The topic of TIS-B service st

Interim Guidance for UAT Avionics Operating with Safe Flight 21 ...

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