asterix 021 "ADS-B Target Reports" edition 2.6 date 2021-12-21 preamble Surveillance data exchange. ADS-B Target Reports. items 008 "Aircraft Operational Status" definition Identification of the operational services available in the aircraft while airborne. group RA "TCAS Resolution Advisory Active" element 1 table 0: TCAS II or ACAS RA not active 1: TCAS RA active TC "Target Trajectory Change Report Capability" element 2 table 0: No capability for Trajectory Change Reports 1: Support for TC+0 reports only 2: Support for multiple TC reports 3: Reserved TS "Target State Report Capability" element 1 table 0: No capability to support Target State Reports 1: Capable of supporting target State Reports ARV "Air-Referenced Velocity Report Capability" element 1 table 0: No capability to generate ARV-reports 1: Capable of generate ARV-reports CDTIA "Cockpit Display of Traffic Information Airborne" element 1 table 0: CDTI not operational 1: CDTI operational NOTTCAS "TCAS System Status" element 1 table 0: TCAS operational 1: TCAS not operational SA "Single Antenna" element 1 table 0: Antenna Diversity 1: Single Antenna only remark Note: - Additional Aircraft Status Information is available in the Reserved Expansion Field of Category 021. 010 "Data Source Identification" definition Identification of the ADS-B station providing information. group SAC "System Area Code" element 8 raw SIC "System Identification Code" element 8 raw remark Note: - The up-to-date list of SACs is published on the EUROCONTROL ASTERIX Web Site (http://www.eurocontrol.int/services/system-area-code-list). 015 "Service Identification" definition Identification of the service provided to one or more users. element 8 raw remark Notes: 1. The service identification is allocated by the system. 2. The service identification is also available in item I023/015 [Ref. 3]. 016 "Service Management" definition Identification of services offered by a ground station (identified by a SIC code). element 8 unsigned quantity 1/2 "s" remark Notes: 1. This item contains the same information as item I023/101 in ASTERIX category 023 [Ref. 3]. Since not all service users receive category 023 data, this information has to be conveyed in category 021 as well. 2. If this item is due to be sent according to the encoding rule above, it shall be sent with the next target report 020 "Emitter Category" definition Characteristics of the originating ADS-B unit. element 8 table 0: No ADS-B Emitter Category Information 1: Light aircraft <= 15500 lbs 2: 15500 lbs < small aircraft <75000 lbs 3: 75000 lbs < medium a/c < 300000 lbs 4: High Vortex Large 5: 300000 lbs <= heavy aircraft 6: Highly manoeuvrable (5g acceleration capability) and high speed (>400 knots cruise) 7: Reserved 8: Reserved 9: Reserved 10: Rotocraft 11: Glider / sailplane 12: Lighter-than-air 13: Unmanned aerial vehicle 14: Space / transatmospheric vehicle 15: Ultralight / handglider / paraglider 16: Parachutist / skydiver 17: Reserved 18: Reserved 19: Reserved 20: Surface emergency vehicle 21: Surface service vehicle 22: Fixed ground or tethered obstruction 23: Cluster obstacle 24: Line obstacle 040 "Target Report Descriptor" definition Type and characteristics of the data as transmitted by a system. extended ATP "Address Type" element 3 table 0: 24-Bit ICAO address 1: Duplicate address 2: Surface vehicle address 3: Anonymous address 4: Reserved for future use 5: Reserved for future use 6: Reserved for future use 7: Reserved for future use ARC "Altitude Reporting Capability" element 2 table 0: 25 ft 1: 100 ft 2: Unknown 3: Invalid RC "Range Check" element 1 table 0: Default 1: Range Check passed, CPR Validation pending RAB "Report Type" element 1 table 0: Report from target transponder 1: Report from field monitor (fixed transponder) - DCR "Differential Correction" element 1 table 0: No differential correction (ADS-B) 1: Differential correction (ADS-B) GBS "Ground Bit Setting" element 1 table 0: Ground Bit not set 1: Ground Bit set SIM "Simulated Target" element 1 table 0: Actual target report 1: Simulated target report TST "Test Target" element 1 table 0: Default 1: Test Target SAA "Selected Altitude Available" element 1 table 0: Equipment capable to provide Selected Altitude 1: Equipment not capable to provide Selected Altitude CL "Confidence Level" element 2 table 0: Report valid 1: Report suspect 2: No information 3: Reserved for future use - spare 1 LLC "List Lookup Check" element 1 table 0: Default 1: List Lookup failed (see note) IPC "Independent Position Check" element 1 table 0: Default (see note) 1: Independent Position Check failed NOGO "No-go Bit Status" element 1 table 0: NOGO-bit not set 1: NOGO-bit set CPR "Compact Position Reporting" element 1 table 0: CPR Validation correct 1: CPR Validation failed LDPJ "Local Decoding Position Jump" element 1 table 0: LDPJ not detected 1: LDPJ detected RCF "Range Check" element 1 table 0: Default 1: Range Check failed - TBC "Total Bits Corrected" group EP "Element Populated Bit" element 1 table 0: Element not populated 1: Element populated VAL "Value" element 6 unsigned integer remark Bits 7/2 contain the total number of bit corrections applied to all Extended Squitter Messages used for the composition of this Category 021 Target Report (regardless of the ages of the Extended Squitter messages). More details on the techniques applied for error correction can be found in EUROCAE ED-102B/RTCA DO-260C [11], Appendix I “Extended Squitter Enhanced Reception Techniques”. - MBC "Maximum Bits Corrected" group EP "Element Populated Bit" element 1 table 0: Element not populated 1: Element populated VAL "Value" element 6 unsigned integer remark Bits 7/2 contain the maximum number of bit corrections applied to a single Extended Squitter Message used for the composition of this Category 021 Target Report (regardless of the ages of the Extended Squitter messages). More details on the techniques applied for error correction can be found in EUROCAE ED- 102B/RTCA DO-260C [11], Appendix I “Extended Squitter Enhanced Reception Techniques”. - remark Notes: 1. Bit 3 indicates that the position reported by the target is within a credible range from the ground station. The range check is followed by the CPR validation to ensure that global and local position decoding both indicate valid position information. Bit 3=1 indicates that the range check was done, but the CPR validation is not yet completed. Once CPR validation is completed, Bit 3 will be reset to 0. 2. Bits 8/6 (ATP): values 0, 2 and 3 depend on the value of the Control Field (CF) in the Downlink Format 18 Message as defined in the ADS-B MOPS (EUROCAE ED-102/RTCA DO-260, Ref [11] Table 2-7). CF=0 denotes a 24-bit ICAO address and shall be encoded with ATP=0. CF=1 denotes “another kind of address for the transmitting ADS-B participant: a self assigned “anonymous” address, a ground vehicle address, or a surface obstruction address”. Thus, from the downlinked information it is not possible to distinguish between a “Surface Vehicle Address – ATP=2” or an “Anonymous Address – ATP=3”. Therefore how CF=1 in the received 1090 MHz Extended Squitter is encoded in ATP shall be described in the ICD of the ASTERIX system. It should be noted, however, that EUROCAE Document ED-129B (the “Technical Specification for a 1090MHz Extended Squitter ADS-B Ground System”, Ref. [12]) requires ATP to be set to “3” if CF=1. Therefore it is recommended that a value of CF=1 received in the Extended Squitter should be encoded as ATP=3. 3. Except for Bit 5 (NOGO), the second extension signals the reasons for which the report has been indicated as suspect (indication Confidence Level (CL) in the first extension). 4. Bit 7, if set to 1, indicates that a lookup in a Black-list/White-list identified that the target may be suspect. 5. Bit 6, if set to 1, indicates that the position reported by the target was validated by an independent means and a discrepancy was detected. If no independent position check is implemented, the default value “0” is to be used. 6. Bit 5 represents the setting of the GO/NOGO-bit as defined in item I023/100 of Category 023 [Ref. 2]. 7. Bit 2 indicates that the Range Check failed, i.e. the target is reported outside the credible range for the Ground Station. For operational users such a target will be suppressed. In services used for monitoring the Ground Station, the target will be transmitted with bit 2 indicating the fault condition. 070 "Mode 3/A Code in Octal Representation" definition Mode-3/A code converted into octal representation. group spare 4 MODE3A "Mode-3/A Reply in Octal Representation" element 12 string octal 071 "Time of Applicability for Position" definition Time of applicability of the reported position, in the form of elapsed time since last midnight, expressed as UTC. element 24 unsigned quantity 1/2^7 "s" remark Notes: 1. The time of applicability value is reset to zero at every midnight. 2. The time of applicability indicates the exact time at which the position transmitted in the target report is valid. 072 "Time of Applicability for Velocity" definition Time of applicability (measurement) of the reported velocity, in the form of elapsed time since last midnight, expressed as UTC. element 24 unsigned quantity 1/2^7 "s" remark Notes: 1. The time of the applicability value is reset to zero at every midnight. 2. The time of applicability indicates the exact time at which the velocity information transmitted in the target report is valid. 3. This item will not be available in some ADS-B technologies. 073 "Time of Message Reception for Position" definition Time of reception of the latest position squitter in the Ground Station, in the form of elapsed time since last midnight, expressed as UTC. element 24 unsigned quantity 1/2^7 "s" remark Note: - The time of message reception value is reset to zero at every midnight. 074 "Time of Message Reception of Position-High Precision" definition Time at which the latest ADS-B position information was received by the ground station, expressed as fraction of the second of the UTC Time. group FSI "Full Second Indication" element 2 table 3: Reserved 2: TOMRp whole seconds = (I021/073) Whole seconds - 1 1: TOMRp whole seconds = (I021/073) Whole seconds + 1 0: TOMRp whole seconds = (I021/073) Whole seconds TOMRP "Fractional Part of the Time of Message Reception for Position in the Ground Station" element 30 unsigned quantity 1/2^30 "s" 075 "Time of Message Reception for Velocity" definition Time of reception of the latest velocity squitter in the Ground Station, in the form of elapsed time since last midnight, expressed as UTC. element 24 unsigned quantity 1/2^7 "s" remark Note: - The time of message reception value is reset to zero at every midnight. 076 "Time of Message Reception of Velocity-High Precision" definition Time at which the latest ADS-B velocity information was received by the ground station, expressed as fraction of the second of the UTC Time. group FSI "Full Second Indication" element 2 table 3: Reserved 2: TOMRp whole seconds = (I021/075) Whole seconds - 1 1: TOMRp whole seconds = (I021/075) Whole seconds + 1 0: TOMRp whole seconds = (I021/075) Whole seconds TOMRP "Fractional Part of the Time of Message Reception for Position in the Ground Station" element 30 unsigned quantity 1/2^30 "s" 077 "Time of ASTERIX Report Transmission" definition Time of the transmission of the ASTERIX category 021 report in the form of elapsed time since last midnight, expressed as UTC. element 24 unsigned quantity 1/2^7 "s" remark Note: - The time of ASTERIX report transmission value is reset to zero at every midnight. 080 "Target Address" definition Target address (emitter identifier) assigned uniquely to each target. element 24 raw remark Note: - The type of address encoded in Data Item I021/080 is transmitted in the ATP indication in the Primary Subfield of Data Item I021/040. 090 "Quality Indicators" definition ADS-B quality indicators transmitted by a/c according to MOPS version. extended NUCRNACV "Navigation Uncertainty Category for Velocity NUCr or the Navigation Accuracy Category for Velocity NACv" element 3 raw NUCPNIC "Navigation Uncertainty Category for Position NUCp or Navigation Integrity Category NIC" element 4 raw remark Notes: 1. Apart from the “PIC” item, all items are defined as per the respective link technology protocol version (“MOPS version”, see I021/210). 2. The primary subfield is kept for backwards compatibility reasons. Version 2 NIC-values shall be mapped accordingly. This is required to ensure that downstream systems, which are not capable of interpreting extensions 2 and 3 (because they use an ASTERIX - NICBARO "Navigation Integrity Category for Barometric Altitude" element 1 raw SIL "Surveillance (version 1) or Source (version 2) Integrity Level" element 2 raw NACP "Navigation Accuracy Category for Position" element 4 raw - spare 2 SILS "SIL-Supplement" element 1 table 0: Measured per flight-hour 1: Measured per sample SDA "Horizontal Position System Design Assurance Level (as Defined in Version 2)" element 2 raw GVA "Geometric Altitude Accuracy" element 2 raw - PIC "Position Integrity Category" element 4 raw spare 3 - remark Notes: 1. Apart from the “PIC” item, all items are defined as per the respective link technology protocol version (“MOPS version”, see I021/210). 2. The primary subfield is kept for backwards compatibility reasons. Version 2 NIC-values shall be mapped accordingly. This is required to ensure that downstream systems, which are not capable of interpreting extensions 2 and 3 (because they use an ASTERIX edition earlier than 2.0) still get the required information 3. “Version 1” or “Version 2” refers to the MOPS version as defined in data item I021/210, bits 6/4 4. “Version 2” refers to the MOPS version as defined in data item I021/210, bits 6/4 5. PIC=0 is defined for completeness only. In this case the third extension shall not be generated. 6. For ED102A/DO260B PIC values of 7 and 9, the NIC supplements for airborne messages (NIC supplements A/B) and surface messages (NIC supplements A/C) are listed. For ED102A/DO260B PIC=8, the NIC supplements A/B for airborne messages are listed. For DO260A PIC values of 7 and 8, the NIC supplement for airborne messages is shown in brackets. The aircraft air-ground status, and hence message type (airborne or surface), is derived from the GBS-bit in I021/040, 1 st extension. 110 "Trajectory Intent" definition Reports indicating the 4D intended trajectory of the aircraft. compound TIS "Trajectory Intent Status" extended NAV "" element 1 table 0: Trajectory Intent Data is available for this aircraft 1: Trajectory Intent Data is not available for this aircraft NVB "" element 1 table 0: Trajectory Intent Data is valid 1: Trajectory Intent Data is not valid spare 5 - TID "Trajectory Intent Data" repetitive 8 group TCA "" element 1 table 0: TCP number available 1: TCP number not available NC "" element 1 table 0: TCP compliance 1: TCP non-compliance TCPN "" description Trajectory Change Point number element 6 raw ALT "Altitude in Two's Complement Form" element 16 signed quantity 10 "ft" >= -1500 <= 150000 LAT "In WGS.84 in Two's Complement" element 24 signed quantity 180/2^23 "°" >= -90 <= 90 LON "In WGS.84 in Two's Complement" element 24 signed quantity 180/2^23 "°" >= -180 < 180 PT "Point Type" element 4 table 0: Unknown 1: Fly by waypoint (LT) 2: Fly over waypoint (LT) 3: Hold pattern (LT) 4: Procedure hold (LT) 5: Procedure turn (LT) 6: RF leg (LT) 7: Top of climb (VT) 8: Top of descent (VT) 9: Start of level (VT) 10: Cross-over altitude (VT) 11: Transition altitude (VT) TD "" element 2 table 0: N/A 1: Turn right 2: Turn left 3: No turn TRA "" description Turn Radius Availability element 1 table 0: TTR not available 1: TTR available TOA "" element 1 table 0: TOV available 1: TOV not available TOV "Time Over Point" element 24 unsigned quantity 1 "s" TTR "TCP Turn Radius" element 16 unsigned quantity 1/100 "NM" >= 0 <= 13107/20 remark Notes: 1. NC is set to one when the aircraft will not fly the path described by the TCP data. 2. TCP numbers start from zero. 3. LT = Lateral Type 4. VT = Vertical Type 5. TOV gives the estimated time before reaching the point. It is defined as the absolute time from midnight. 6. TOV is meaningful only if TOA is set to 1. 130 "Position in WGS-84 Co-ordinates" definition Position in WGS-84 Co-ordinates. group LAT "Latitude" element 24 signed quantity 180/2^23 "°" >= -90 <= 90 LON "Longitude" element 24 signed quantity 180/2^23 "°" >= -180 < 180 remark Notes: - Positive longitude indicates East. Positive latitude indicates North. 131 "High-Resolution Position in WGS-84 Co-ordinates" definition Position in WGS-84 Co-ordinates in high resolution. group LAT "Latitude" element 32 signed quantity 180/2^30 "°" >= -90 <= 90 LON "Longitude" element 32 signed quantity 180/2^30 "°" >= -180 < 180 remark Notes: - Positive longitude indicates East. Positive latitude indicates North. 132 "Message Amplitude" definition Amplitude, in dBm, of ADS-B messages received by the ground station, coded in two’s complement. element 8 signed quantity 1 "dBm" remark Note: - The value gives the amplitude of the latest received squitter. 140 "Geometric Height" definition Minimum height from a plane tangent to the earth’s ellipsoid, defined by WGS-84, in two’s complement form. element 16 signed quantity 25/2^2 "ft" >= -1500 < 150000 remark Note: 1. LSB is required to be less than 10 ft by ICAO. 2. A value of ‘0111111111111111’ indicates that the aircraft transmits a “greater than” indication. 145 "Flight Level" definition Flight Level from barometric measurements,not QNH corrected, in two’s complement form. element 16 signed quantity 1/2^2 "FL" >= -15 < 1500 146 "Selected Altitude" definition The Selected Altitude as provided by the avionics and corresponding either to the MCP/FCU Selected Altitude (the ATC cleared altitude entered by the flight crew into the avionics) or to the FMS Selected Altitude. group SAS "Source Availability" element 1 table 0: No source information provided 1: Source Information provided S "Source" element 2 table 0: Unknown 1: Aircraft Altitude (Holding Altitude) 2: MCP/FCU Selected Altitude 3: FMS Selected Altitude ALT "Altitude" element 13 signed quantity 25 "ft" >= -1300 < 100000 remark Notes: 1. The Selected Altitude provided in this field is not necessarily the “Target Altitude” as defined by ICAO. 2. The value of “Source” (bits 15/14) indicating “unknown” or “Aircraft Altitude” is kept for backward compatibility as these indications are not provided by “version 2” systems as defined by data item I021/210, bits 6/4. 3. Vertical mode indications supporting the determination of the nature of the Selected Altitude are provided in the Reserved Expansion Field in the subfield NAV. 148 "Final State Selected Altitude" definition The vertical intent value that corresponds with the ATC cleared altitude, as derived from the Altitude Control Panel (MCP/FCU). group MV "Manage Vertical Mode" element 1 table 0: Not active or unknown 1: Active AH "Altitude Hold Mode" element 1 table 0: Not active or unknown 1: Active AM "Approach Mode" element 1 table 0: Not active or unknown 1: Active ALT "Altitude" element 13 signed quantity 25 "ft" >= -1300 < 100000 remark Notes: - This item is kept for backward compatibility but shall not be used for “version 2” ADS-B systems (as defined by data item I021/210, bits 6/4) for which item 146 will be used to forward the MCP/FCU or the FMS selected altitude information. For “version 2” ADS-B systems, the vertical mode indications will be provided through the Reserved Expansion Field in the subfield NAV . 150 "Air Speed" definition Calculated Air Speed (Element of Air Vector). group IM "" element 1 table 0: Air Speed = IAS, LSB (Bit-1) = 2 -14 NM/s 1: Air Speed = Mach, LSB (Bit-1) = 0.001 AS "Air Speed (IAS or Mach)" element 15 case 150/IM 0: unsigned quantity 1/2^14 "NM/s" 1: unsigned quantity 1/1000 "Mach" default: raw 151 "True Airspeed" definition True Air Speed. group RE "Range Exceeded Indicator" element 1 table 0: Value in defined range 1: Value exceeds defined range TAS "True Air Speed" element 15 unsigned quantity 1 "kt" remark Notes: - The RE-Bit, if set, indicates that the value to be transmitted is beyond the range defined for this specific data item and the applied technology. In this case the True Air Speed contains the maximum value that can be downloaded from the aircraft avionics and the RE-bit indicates that the actual value is greater than the value contained in the field. 152 "Magnetic Heading" definition Magnetic Heading (Element of Air Vector). element 16 unsigned quantity 360/2^16 "°" remark Notes: - True North Heading is defined in the Reserved Expansion Field in the subfield TNH. 155 "Barometric Vertical Rate" definition Barometric Vertical Rate, in two’s complement form. group RE "Range Exceeded Indicator" element 1 table 0: Value in defined range 1: Value exceeds defined range BVR "Barometric Vertical Rate" element 15 signed quantity 25/2^2 "ft/min" remark Notes: - The RE-Bit, if set, indicates that the value to be transmitted is beyond the range defined for this specific data item and the applied technology. In this case the Barometric Vertical Rate contains the maximum value that can be downloaded from the aircraft avionics and the RE-bit indicates that the actual value is greater than the value contained in the field. 157 "Geometric Vertical Rate" definition Geometric Vertical Rate, in two’s complement form, with reference to WGS-84. group RE "Range Exceeded Indicator" element 1 table 0: Value in defined range 1: Value exceeds defined range GVR "Geometric Vertical Rate" element 15 signed quantity 25/2^2 "ft/min" remark Notes: - The RE-Bit, if set, indicates that the value to be transmitted is beyond the range defined for this specific data item and the applied technology. In this case the Geometric Vertical Rate contains the maximum value that can be downloaded from the aircraft avionics and the RE-bit indicates that the actual value is greater than the value contained in the field. 160 "Airborne Ground Vector" definition Ground Speed and Track Angle elements of Airborne Ground Vector. group RE "Range Exceeded Indicator" element 1 table 0: Value in defined range 1: Value exceeds defined range GS "Ground Speed Referenced to WGS-84" element 15 unsigned quantity 1/2^14 "NM/s" >= 0 < 2 TA "Track Angle Clockwise Reference to True North" element 16 unsigned quantity 360/2^16 "°" remark Notes: 1. The RE-Bit, if set, indicates that the value to be transmitted is beyond the range defined for this specific data item and the applied technology. In this case the Ground Speed contains the maximum value that can be downloaded from the aircraft avionics and the RE-bit indicates that the actual value is greater than the value contained in the field. 2. The Surface Ground Vector format is defined in the Reserved Expansion Field in the subfield SGV. 161 "Track Number" definition An integer value representing a unique reference to a track record within a particular track file. group spare 4 TRNUM "Track Number" element 12 raw 165 "Track Angle Rate" definition Rate of Turn, in two’s complement form. group spare 6 TAR "Track Angle Rate" element 10 signed quantity 1/2^5 "°/s" >= -16 <= 16 remark Notes: 1. A positive value represents a right turn, whereas a negative value represents a left turn. 2. Maximum value means Maximum value or above. 3. This item will not be transmitted for the technology 1090 MHz Extended Squitter. 170 "Target Identification" definition Target (aircraft or vehicle) identification in 8 characters, as reported by the target. element 48 string icao 200 "Target Status" definition Status of the target group ICF "Intent Change Flag (see Note)" element 1 table 0: No intent change active 1: Intent change flag raised LNAV "LNAV Mode" element 1 table 0: LNAV Mode engaged 1: LNAV Mode not engaged ME "Military Emergency" element 1 table 0: No military emergency 1: Military emergency PS "Priority Status" element 3 table 0: No emergency / not reported 1: General emergency 2: Lifeguard / medical emergency 3: Minimum fuel 4: No communications 5: Unlawful interference 6: DOWNED Aircraft SS "Surveillance Status" element 2 table 0: No condition reported 1: Permanent Alert (Emergency condition) 2: Temporary Alert (change in Mode 3/A Code other than emergency) 3: SPI set remark Notes: - Bit-8 (ICF), when set to “1” indicates that new information is available in the Mode S GICB registers 40, 41 or 42. As of MOPS Version 3 (see I021/210) as defined in Ref. [11] this flag is no longer used and shall be set to “0”. - 2: The logic for setting the LNAV indication is reversed compared to the definition of the LNAV indication in EUROCAE ED-102()/RTCA DO-260(). Whether or not this bit is actively set is indicated in the setting of the “Status of the MCP/FCO Mode Bits” defined in EUROCAE ED-102B/RTCA DO-260C (Ref. [11] chapter 2.2.3.2.7.1.3.11) and in the Reserved Expansion Field of Category 021, item I021/REF/NAV/MFM. If MFM#VAL is set to 0, LNAV shall be set to 1. - Bits 5/3 (PS) have been redefined in Version 3 ADS-B systems as defined in EUROCAE ED-102B/RTCA DO-260C (Ref. [11]). For Version 3 ADS-B systems (see I021/210 - VN) the Priority Status shall be encoded in the Reserved Expansion Field, Item STA, Primary Subfield Bits 6/5. However, since values have been re-defined in ADS-B Version 3, mapping is required to ensure that information is not lost. This mapping shall be done according to the following table: :: ADS-B Version 3 (PS3) ADS-Version < 3 (I021/200 - PS) 0 (No Emergency/not reported) 0 (No Emergency/not reported) 1 (General emergency) 1 (General emergency) 2 (UAS/RPAS Lost Link) 4 (No communication) 3 (Minimum fuel) 3 (Minimum fuel) 4 (No communication) 4 (No communication) 5 (Unlawful interference) 5 (Unlawful interference) 6 (Aircraft in distress - 1 (General emergency) automatic activation) 7 (Aircraft in distress - 1 (General emergency) manual activation) 210 "MOPS Version" definition Identification of the MOPS version used by a/c to supply ADS-B information. group spare 1 VNS "Version Not Supported" element 1 table 0: The MOPS Version is supported by the GS 1: The MOPS Version is not supported by the GS VN "Version Number" element 3 table 0: ED102/DO-260 [Ref. 7] 1: DO-260A [Ref. 8] 2: ED102A/DO-260B [Ref. 10] 3: ED-102B/DO-260C [Ref. 11] LTT "Link Technology Type" element 3 table 0: Other 1: UAT 2: 1090 ES 3: VDL 4 4: Not assigned 5: Not assigned 6: Not assigned 7: Not assigned remark Notes: - VN sub-field shall contain a value describing the MOPS used by each aircraft. The versions of other link technologies are assumed to be in line with the 1090 ES MOPS versions and the corresponding MASPS versions. - Bit 7 (VNS) when set to 1 indicates that the aircraft transmits a MOPS Version indication that is not supported by the Ground Station. However, since MOPS versions are supposed to be backwards compatible, the GS has attempted to interpret the message and achieved a credible result. The fact that the MOPS version received is not supported by the GS is submitted as additional information to subsequent processing systems. - In Bits 6/4 (VN) the possibility has been added to indicate an Extended Squitter received from a “Version 3” ADS-B System conforming to Ref. [11]. This edition of the Category 021 Specification has NOT been extended to process additional data contained in VERSION 3 Extended Squitters. Thus, systems in line with this specification cannot benefit from the changes applied. Adding Version 3 to the permitted Version Numbers only permits to utilise the Version 3 Extended Squitters by decoding the information that can be encoded in the version of this specification. 220 "Met Information" definition Meteorological information. compound WS "Wind Speed" element 16 unsigned quantity 1 "kt" >= 0 <= 300 WD "Wind Direction" element 16 unsigned quantity 1 "°" >= 1 <= 360 TMP "Temperature" element 16 signed quantity 1/2^2 "°C" >= -100 <= 100 TRB "Turbulence" element 8 unsigned integer >= 0 <= 15 230 "Roll Angle" definition The roll angle, in two’s complement form, of an aircraft executing a turn. element 16 signed quantity 1/100 "°" >= -180 <= 180 remark Notes: 1. Negative Value indicates “Left Wing Down”. 2. Resolution provided by the technology “1090 MHz Extended Squitter” is 1 degree. 250 "Mode S MB Data" definition Mode S Comm B data as extracted from the aircraft transponder. repetitive 8 element 64 bds remark Notes: 1. For the transmission of BDS20, item 170 should be used. 2. For the transmission of BDS30, item 260 is used. 260 "ACAS Resolution Advisory Report" definition Currently active Resolution Advisory (RA), if any, generated by the ACAS associated with the transponder transmitting the RA message and threat identity data. group TYP "Message Type (= 28 for 1090 ES, Version 2)" element 5 raw STYP "Message Sub-type (= 2 for 1090 ES, Version 2)" element 3 raw ARA "Active Resolution Advisories" element 14 raw RAC "RAC (RA Complement) Record" element 4 raw RAT "RA Terminated" element 1 raw MTE "Multiple Threat Encounter" element 1 raw TTI "Threat Type Indicator" element 2 raw TID "Threat Identity Data" element 26 raw remark Notes: 1. Version denotes the MOPS version as defined in I021/210, bits 6/4 2. This data items copies the value of BDS register 6,1 for message type 28, subtype 2 3. The “TYP” and “STYP” items are implementation (i.e. link technology) dependent. 4. Refer to ICAO Annex 10 SARPs for detailed explanations [Ref. 5] 5. Collision Avoidance System ACAS Xu (as defined in EUROCAE ED-275/RTCA DO-386 [13]) uses two BDS Registers to transmit the Resolution Advisory (BDS Register 3,0 and BDS Register 3,1). While BDS Register 3,0 is transmitted by ADS-B (in Message Type Code 28, Subtype Code 2), BDS Register 3,1 is not transmitted as part of the ADS-B TCAS RA Broadcast (confirm EUROCAE ED- 275/RTCA DO-386 [13] chapter 2.2.3.8.3.2.10) 271 "Surface Capabilities and Characteristics" definition Operational capabilities of the aircraft while on the ground. extended spare 2 POA "Position Offset Applied" element 1 table 0: Position transmitted is not ADS-B position reference point 1: Position transmitted is the ADS-B position reference point CDTIS "Cockpit Display of Traffic Information Surface" element 1 table 0: CDTI not operational 1: CDTI operational B2LOW "Class B2 Transmit Power Less Than 70 Watts" element 1 table 0: >= 70 Watts 1: < 70 Watts RAS "Receiving ATC Services" element 1 table 0: Aircraft not receiving ATC-services 1: Aircraft receiving ATC services IDENT "Setting of IDENT Switch" element 1 table 0: IDENT switch not active 1: IDENT switch active - LW "Length and Width of the Aircraft" element 4 raw spare 3 - remark Notes: 1. Version 2 (as defined in I021/210, bits 6/4) data technology protocols encode “No Data or Unknown” with value 0. In this case data item I021/271, first extension is not generated. 2. As of edition 2.2 the structure of this data item has been changed. Edition 2.2 is not backwards compatible with previous editions. 295 "Data Ages" definition Ages of the data provided. compound AOS "Aircraft Operational Status Age" description Age of the information transmitted in item I021/008. element 8 unsigned quantity 1/10 "s" <= 51/2 TRD "Target Report Descriptor Age" description Age of the Target Report Descriptor, item I021/040 element 8 unsigned quantity 1/10 "s" <= 51/2 M3A "Mode 3/A Age" description Age of the Mode 3/A Code, item I021/070 element 8 unsigned quantity 1/10 "s" <= 51/2 QI "Quality Indicators Age" description Age of the Quality Indicators, item I021/090 element 8 unsigned quantity 1/10 "s" <= 51/2 TI1 "Trajectory Intent Age" description Age of the Trajectory Intent information, item I021/110 element 8 unsigned quantity 1/10 "s" <= 51/2 MAM "Message Amplitude Age" description Age of the message amplitude, item I021/132 element 8 unsigned quantity 1/10 "s" <= 51/2 GH "Geometric Height Age" description Age of the Geometric Height, item 021/140 element 8 unsigned quantity 1/10 "s" <= 51/2 FL "Flight Level Age" description Age of the Flight Level, item I021/145 element 8 unsigned quantity 1/10 "s" <= 51/2 SAL "Selected Altitude Age" description Age of the Selected Altitude, item I021/146 element 8 unsigned quantity 1/10 "s" <= 51/2 FSA "Final State Selected Altitude Age" description Age of the Final State Selected Altitude, item I021/148 element 8 unsigned quantity 1/10 "s" <= 51/2 AS "Air Speed Age" description Age of the Air Speed, item I021/150 element 8 unsigned quantity 1/10 "s" <= 51/2 TAS "True Air Speed Age" description Age of the True Air Speed, item I021/151 element 8 unsigned quantity 1/10 "s" <= 51/2 MH "Magnetic Heading Age" description Age of the Magnetic Heading, item I021/152 element 8 unsigned quantity 1/10 "s" <= 51/2 BVR "Barometric Vertical Rate Age" description Age of the Barometric Vertical Rate, item I021/155 element 8 unsigned quantity 1/10 "s" <= 51/2 GVR "Geometric Vertical Rate Age" description Age of the Geometric Vertical Rate, item I021/157 element 8 unsigned quantity 1/10 "s" <= 51/2 GV "Ground Vector Age" description Age of the Ground Vector, item I021/160 element 8 unsigned quantity 1/10 "s" <= 51/2 TAR "Track Angle Rate Age" description Age of the Track Angle Rate, item I021/165 element 8 unsigned quantity 1/10 "s" <= 51/2 TI2 "Target Identification Age" description Age of the Target Identification, item I021/170 element 8 unsigned quantity 1/10 "s" <= 51/2 TS "Target Status Age" description Age of the Target Status, item I021/200 element 8 unsigned quantity 1/10 "s" <= 51/2 MET "Met Information Age" description Age of the Meteorological Information, item I021/220 element 8 unsigned quantity 1/10 "s" <= 51/2 ROA "Roll Angle Age" description Age of the Roll Angle, item I021/230 element 8 unsigned quantity 1/10 "s" <= 51/2 ARA "ACAS Resolution Advisory Age" description Age of the latest update of an active ACAS Resolution Advisory, item I021/260 element 8 unsigned quantity 1/10 "s" <= 51/2 SCC "Surface Capabilities and Characteristics Age" description Age of the information on the surface capabilities and characteristics of the respective target, item I021/271 element 8 unsigned quantity 1/10 "s" <= 51/2 remark Notes: - In all the subfields, the maximum value indicates “maximum value or above”. 400 "Receiver ID" definition Designator of Ground Station in Distributed System. element 8 raw RE "Reserved Expansion Field" definition Expansion explicit re SP "Special Purpose Field" definition Special Purpose Field explicit sp uap 010 040 161 015 071 130 131 072 150 151 080 073 074 075 076 140 090 210 070 230 145 152 200 155 157 160 165 077 170 020 220 146 148 110 016 008 271 132 250 260 400 295 - - - - - RE SP