asterix 021 "ADS-B Target Reports" edition 0.25 date 2005-03-01 preamble Surveillance data exchange. ADS-B Target Reports. items 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). 020 "Emitter Category" definition Characteristics of the originating ADS-B unit. element 8 table 1: Light aircraft <= 7000 kg 2: Reserved 3: 7000 kg < Medium aircraft < 136000 kg 4: Reserved 5: 136000 kg <= 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: Reserved 24: Reserved 030 "Time of Day" definition Time of applicability (measurement) 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 The time of the day value is reset to zero at every midnight. 032 "Time of Day Accuracy" definition The maximum difference between the actual time of applicability of the reported position and the time reported in the Time of Day item (I021/030). element 8 unsigned quantity 1/2^8 "s" 040 "Target Report Descriptor" definition Type and characteristics of the data as transmitted by a system. group 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 RAB "Report Type" element 1 table 0: Report from target transponder 1: Report from field monitor (fixed transponder) SAA "Selected Altitude Available" element 1 table 0: Equipment capable to provide Selected Altitude 1: Equipment not capable to provide Selected Altitude SPI "Special Position Identification" element 1 table 0: Absence of SPI 1: Special Position Identification spare 1 ATP "Address Type" element 3 table 0: Non unique address 1: 24-Bit ICAO 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: Unknown 1: 25 ft 2: 100 ft spare 3 080 "Target Address" definition Target address (emitter identifier) assigned uniquely to each target. element 24 raw 090 "Figure of Merit" definition ADS figure of merit (FOM) provided by the aircraft avionics. group AC "ACAS Capabilities" element 2 table 0: Unknown 1: ACAS not operational 2: ACAS operartional 3: Invalid MN "Multiple Navigation Aids" element 2 table 0: Unknown 1: Multiple Navigation not operational 2: Multiple Navigation operartional 3: Invalid DC "Differencial Correction" element 2 table 0: Unknown 1: Differencial Correction 2: NO Differencial Correction 3: Invalid spare 6 PA "Position Accuracy" element 4 signed quantity 1 "" remark Note: bits-4/1 (PA) code the “Navigational Uncertainty Categories – Position” as described in the ADS-B MASPS [Ref. 3] 095 "Velocity Accuracy" definition Velocity uncertainty category of the least accurate velocity element 8 raw remark Note: bits-8/1 code the “Navigational Uncertainty Categories – Velocity” as described in the ADS-B MASPS [Ref. 3] 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 Calculated Position in WGS-84 Co-ordinates with a resolution of 180/(2^25) degrees. group LAT "Latitude" element 32 signed quantity 180/2^25 "°" >= -90 <= 90 LON "Longitude" element 32 signed quantity 180/2^25 "°" >= -180 < 180 remark Notes: 1. Positive longitude indicates East. Positive latitude indicates North. 2. The LSB provides a resolution at least better than 0.6m. 140 "Geometric Altitude" definition Vertical distance between the target and the projection of its position on the earth’s ellipsoid, as defined by WGS84, 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. 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 "Intermediate State Selected Altitude" definition The short-term vertical intent as described by either the FMS selected altitude, the Altitude Control Panel Selected Altitude, or the current aircraft altitude according to the aircraft's mode of flight. group SAS "Source Availability" element 1 table 0: No source information provided 1: Source Information provided SRC "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 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 1: Active AH "Altitude Hold Mode" element 1 table 0: Not active 1: Active AM "Approach Mode" element 1 table 0: Not active 1: Active ALT "Altitude" element 13 signed quantity 25 "ft" >= -1300 < 100000 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. element 16 unsigned quantity 1 "kt" 152 "Magnetic Heading" definition Magnetic Heading (Element of Air Vector). element 16 unsigned quantity 360/2^16 "°" 155 "Barometric Vertical Rate" definition Barometric Vertical Rate, in two’s complement form. element 16 signed quantity 25/2^2 "ft/min" 157 "Geometric Vertical Rate" definition Geometric Vertical Rate, in two’s complement form, with reference to WGS-84. element 16 signed quantity 25/2^2 "ft/min" 160 "Ground Vector" definition Ground Speed and Track Angle elements of Ground Vector. group GS "Ground Speed in Two's Complement Form Referenced to WGS84" element 16 signed quantity 1/2^14 "NM/s" >= 0 < 2 TA "Track Angle" element 16 unsigned quantity 360/2^16 "°" 165 "Rate Of Turn" definition Rate of Turn, in two’s complement form. extended TI "Turn Indicator" element 2 table 0: Not available 1: Left 2: Right 3: Straight spare 5 - ROT "Rate of Turn" element 7 signed quantity 1/2^2 "°/s" <= 15 - remark Notes: 1. A positive value represents a right turn, whereas a negative value represents a left turn. 2. Value 15 means 15 °/s or above. 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 element 8 table 0: No emergency / not reported 1: General emergency 2: Lifeguard / medical 3: Minimum fuel 4: No communications 5: Unlawful interference 210 "Link Technology Indicator" definition Indication of which ADS link technology has been used to send the target report. group spare 3 DTI "Cockpit Display of Traffic Information" element 1 table 0: Unknown 1: Aircraft equiped with CDTI MDS "Mode-S Extended Squitter" element 1 table 0: Not used 1: Used UAT "UAT" element 1 table 0: Not used 1: Used VDL "VDL Mode 4" element 1 table 0: Not used 1: Used OTR "Other Technology" element 1 table 0: Not used 1: Used 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. RE "Reserved Expansion Field" definition Expansion explicit re SP "Special Purpose Field" definition Special Purpose Field explicit sp uap 010 040 030 130 080 140 090 210 230 145 150 151 152 155 157 160 165 170 095 032 200 020 220 146 148 110 - - - - - - - RE SP