asterix 010 "Transmission of Monosensor Surface Movement Data" edition 1.1 date 2007-03-01 preamble Surveillance data exchange. items 000 "Message Type" definition This Data Item allows for a more convenient handling of the messages at the receiver side by further defining the type of transaction. element 8 table 1: Target Report 2: Start of Update Cycle 3: Periodic Status Message 4: Event-triggered Status Message remark Notes: 1. In applications where transactions of various types are exchanged, the Message Type Data Item facilitates the proper message handling at the receiver side. 2. All Message Type values are reserved for common standard use. 3. The list of items present for the four message types is defined in the following table. M stands for mandatory, O for optional, X for never present. The list of items present for the four message types is defined in the following table. M stands for mandatory, O for optional, X for never present. :: Item Type [001, 002, 003, 004] [Target Report, Start of Update Cycle, Periodic Status Message, Event Status Message] I010/000 Message Type M M M M I010/010 Data Source Identifier M M M M I010/020 Target Report Descriptor M X X X I010/040 Measured Position in Polar Coordinates O X X X I010/041 Position in WGS-84 Coordinates O X X X I010/042 Position in Cartesian Coordinates O X X X I010/060 Mode-3/A Code O X X X I010/090 Flight Level in Binary Representation O X X X I010/091 Measured Height O X X X I010/131 Amplitude of Primary Plot O X X X I010/140 Time of Day M M M M I010/161 Track Number O X X X I010/170 Track Status O X X X I010/200 Calculated Track Velocity in Polar Coordinates O X X X I010/202 Calculated Track Velocity in Cartesian Coordinates O X X X I010/210 Calculated Acceleration O X X X I010/220 Target Address O X X X I010/245 Target Identification O X X X I010/250 Mode S MB Data O X X X I010/270 Target Size & Orientation O X X X I010/280 Presence O X X X I010/300 Vehicle Fleet Identification O X X X I010/310 Pre-programmed Message O X X X I010/500 Standard Deviation of Position O X X X I010/550 System Status X O M M 010 "Data Source Identifier" definition Identification of the system from which the data are received. group SAC "System Area Code" element 8 raw SIC "System Identification Code" element 8 raw remark NOTE - The SAC is fixed to zero to indicate a data flow local to the airport. 020 "Target Report Descriptor" definition Type and characteristics of the data as transmitted by a system. extended TYP "" element 3 table 0: SSR multilateration 1: Mode S multilateration 2: ADS-B 3: PSR 4: Magnetic Loop System 5: HF multilateration 6: Not defined 7: Other types DCR "" element 1 table 0: No differential correction (ADS-B) 1: Differential correction (ADS-B) CHN "" element 1 table 0: Chain 1 1: Chain 2 GBS "" element 1 table 0: Transponder Ground bit not set 1: Transponder Ground bit set CRT "" element 1 table 0: No Corrupted reply in multilateration 1: Corrupted replies in multilateration - SIM "" element 1 table 0: Actual target report 1: Simulated target report TST "" element 1 table 0: Default 1: Test Target RAB "" element 1 table 0: Report from target transponder 1: Report from field monitor (fixed transponder) LOP "" element 2 table 0: Undetermined 1: Loop start 2: Loop finish TOT "" element 2 table 0: Undetermined 1: Aircraft 2: Ground vehicle 3: Helicopter - SPI "" element 1 table 0: Absence of SPI 1: Special Position Identification spare 6 - 040 "Measured Position in Polar Co-ordinates" definition Measured position of a target in local polar co-ordinates. group RHO "RHO" element 16 unsigned quantity 1 "m" <= 65536 TH "Theta" element 16 unsigned quantity 360/2^16 "°" 041 "Position in WGS-84 Co-ordinates" definition Position of a target in WGS-84 Co-ordinates. group LAT "Latitude" element 32 signed quantity 180/2^31 "°" >= -90 <= 90 LON "Longitude" element 32 signed quantity 180/2^31 "°" >= -180 < 180 042 "Position in Cartesian Co-ordinates" definition Position of a target in Cartesian co-ordinates, in two’s complement form. group X "X Coordinate" element 16 signed quantity 1 "m" >= -32768 <= 32768 Y "Y Coordinate" element 16 signed quantity 1 "m" >= -32768 <= 32768 060 "Mode-3/A Code in Octal Representation" definition Mode-3/A code converted into octal representation. group V "Validated" element 1 table 0: Code validated 1: Code not validated G "Garbled" element 1 table 0: Default 1: Garbled code L "" element 1 table 0: Mode-3/A code derived from the reply of the transponder 1: Mode-3/A code not extracted during the last scan spare 1 MODE3A "Mode-3/A Reply in Octal Representation" element 12 string octal remark Notes: 1. Bit 15 has no meaning in the case of a smoothed Mode-3/A code and is set to 0 for a calculated track. For Mode S, it is set to one when an error correction has been attempted. 2. For Mode S, bit 16 is normally set to zero, but can exceptionally be set to one to indicate a non-validated Mode-3/A code (e.g. alert condition detected, but new Mode-3/A code not successfully extracted). 090 "Flight Level in Binary Representation" definition Flight Level (Mode C / Mode S Altitude) converted into binary two's complement representation. group V "Validated" element 1 table 0: Code validated 1: Code not validated G "Garbled" element 1 table 0: Default 1: Garbled code FL "Flight Level" element 14 signed quantity 1/2^2 "FL" remark Notes: 1. The value shall be within the range described by ICAO Annex 10 2. For Mode S, bit 15 (G) is set to one when an error correction has been attempted. 091 "Measured Height" definition Height above local 2D co-ordinate reference system (two's complement) based on direct measurements not related to barometric pressure. element 16 signed quantity 25/2^2 "ft" >= -204800 <= 204800 131 "Amplitude of Primary Plot" definition Amplitude of Primary Plot. element 8 raw remark Notes: - The value is radar-dependent, 0 being the minimum detectable level for that radar. 140 "Time of Day" definition Absolute time stamping expressed as UTC. element 24 unsigned quantity 1/2^7 "s" remark Notes: - The time of day value is reset to zero each day at midnight. 161 "Track Number" definition An integer value representing a unique reference to a track record within a particular track file. group spare 4 TRK "Track Number" element 12 raw 170 "Track Status" definition Status of track. extended CNF "" element 1 table 0: Confirmed track 1: Track in initialisation phase TRE "" element 1 table 0: Default 1: Last report for a track CST "" element 2 table 0: No extrapolation 1: Predictable extrapolation due to sensor refresh period (see NOTE) 2: Predictable extrapolation in masked area 3: Extrapolation due to unpredictable absence of detection MAH "" element 1 table 0: Default 1: Horizontal manoeuvre TCC "" element 1 table 0: Tracking performed in 'Sensor Plane', i.e. neither slant range correction nor projection was applied 1: Slant range correction and a suitable projection technique are used to track in a 2D.reference plane, tangential to the earth model at the Sensor Site co-ordinates STH "" element 1 table 0: Measured position 1: Smoothed position - TOM "" element 2 table 0: Unknown type of movement 1: Taking-off 2: Landing 3: Other types of movement DOU "" element 3 table 0: No doubt 1: Doubtful correlation (undetermined reason) 2: Doubtful correlation in clutter 3: Loss of accuracy 4: Loss of accuracy in clutter 5: Unstable track 6: Previously coasted MRS "" element 2 table 0: Merge or split indication undetermined 1: Track merged by association to plot 2: Track merged by non-association to plot 3: Split track - GHO "" element 1 table 0: Default 1: Ghost track spare 6 - remark Notes: 1. Some sensors are not be able to scan the whole coverage in one refresh period. Therefore, track extrapolation is performed in un-scanned sectors. CST is then set to 01. 2. Bit-8 (GHO) is used to signal that the track is suspected to have been generated by a fake target. 200 "Calculated Track Velocity in Polar Co-ordinates" definition Calculated track velocity expressed in polar co-ordinates. group GSP "Ground Speed" element 16 unsigned quantity 1/2^14 "NM/s" <= 2 TRA "Track Angle" element 16 unsigned quantity 360/2^16 "°" 202 "Calculated Track Velocity in Cartesian Co-ordinates" definition Calculated track velocity expressed in Cartesian co-ordinates, in two’s complement representation. group VX "X Velocity" element 16 signed quantity 1/2^4 "m/s" >= -8192 <= 8192 VY "Y Velocity" element 16 signed quantity 1/2^4 "m/s" >= -8192 <= 8192 210 "Calculated Acceleration" definition Calculated Acceleration of the target, in two’s complement form. group AX "X Acceleration" element 8 signed quantity 1/2^4 "m/s²" >= -31 <= 31 AY "Y Acceleration" element 8 signed quantity 1/2^4 "m/s²" >= -31 <= 31 220 "Target Address" definition Target address (24-bits address) assigned uniquely to each Target. element 24 raw 245 "Target Identification" definition Target (aircraft or vehicle) identification in 8 characters. group STI "" element 2 table 0: Callsign or registration downlinked from transponder 1: Callsign not downlinked from transponder 2: Registration not downlinked from transponder spare 6 CHR "Characters 1-8 (Coded on 6 Bits Each) Defining Target Identification" element 48 string icao remark Notes: - See ICAO document Annex 10, Volume I, Part I, section 3.8.2.9 for the coding rules. 250 "Mode S MB Data" definition Mode S Comm B data as extracted from the aircraft transponder. repetitive 8 group MBDATA "" description 56-bit message conveying Mode S Comm B message data element 56 raw BDS1 "" description Comm B Data Buffer Store 1 Address element 4 raw BDS2 "" description Comm B Data Buffer Store 2 Address element 4 raw remark Notes: - For the transmission of BDS20, item 245 is used. 270 "Target Size and Orientation" definition Target size defined as length and width of the detected target, and orientation. extended LENGTH "Length" element 7 unsigned quantity 1 "m" - ORIENTATION "Orientation" element 7 unsigned quantity 360/2^7 "°" - WIDTH "Width" element 7 unsigned quantity 1 "m" - remark Notes: - The orientation gives the direction which the aircraft nose is pointing, relative to the Geographical North. 280 "Presence" definition Positions of all elementary presences constituting a plot. repetitive 8 group DRHO "" description Difference between the radial distance of the plot centre and that of the presence. element 8 signed quantity 1 "m" >= -127 <= 127 DTHETA "" description Difference between the azimuth of the plot centre and that of the presence. element 8 signed quantity 3/20 "°" >= -381/20 <= 381/20 300 "Vehicle Fleet Identification" definition Vehicle fleet identification number. element 8 table 0: Unknown 1: ATC equipment maintenance 2: Airport maintenance 3: Fire 4: Bird scarer 5: Snow plough 6: Runway sweeper 7: Emergency 8: Police 9: Bus 10: Tug (push/tow) 11: Grass cutter 12: Fuel 13: Baggage 14: Catering 15: Aircraft maintenance 16: Flyco (follow me) 310 "Pre-programmed Message" definition Number related to a pre-programmed message that can be transmitted by a vehicle. group TRB "" element 1 table 0: Default 1: In Trouble MSG "" element 7 table 1: Towing aircraft 2: “Follow me” operation 3: Runway check 4: Emergency operation (fire, medical...) 5: Work in progress (maintenance, birds scarer, sweepers...) 500 "Standard Deviation of Position" definition Standard Deviation of Position group DEVX "Standard Deviation of X Component" element 8 unsigned quantity 1/2^2 "m" DEVY "Standard Deviation of Y Component" element 8 unsigned quantity 1/2^2 "m" COVXY "Covariance in Two’s Complement Form" element 16 signed quantity 1/2^2 "m" 550 "System Status" definition Information concerning the configuration and status of a System. group NOGO "Operational Release Status of the System" element 2 table 0: Operational 1: Degraded 2: NOGO OVL "Overload Indicator" element 1 table 0: No overload 1: Overload TSV "Time Source Validity" element 1 table 0: Valid 1: Invalid DIV "" element 1 table 0: Normal Operation 1: Diversity degraded TTF "" element 1 table 0: Test Target Operative 1: Test Target Failure spare 2 remark Notes: - For a radar, bit-4 (DIV) is set to zero either when diversity is not used, or when diversity is used and operational. RE "Reserved Expansion Field" definition Expansion explicit re SP "Special Purpose Field" definition Special Purpose Field explicit sp uap 010 000 020 140 041 040 042 200 202 161 170 060 220 245 250 300 090 091 270 550 310 500 280 131 210 - SP RE