asterix 034 "Transmission of Monoradar Service Messages" edition 1.27 date 2007-05-01 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: North marker message 2: Sector crossing message 3: Geographical filtering message 4: Jamming strobe 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. TODO: message types table 010 "Data Source Identifier" definition Identification of the radar station from which the data are received. 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 Web Site (http://www.eurocontrol.int/asterix). 020 "Sector Number" definition Eight most significant bits of the antenna azimuth defining a particular azimuth sector. element 8 unsigned quantity 360/2^8 "°" 030 "Time of Day" definition Absolute time stamping expressed as UTC time. element 24 unsigned quantity 1/2^7 "s" remark Notes: - The time of day value is reset to zero each day at midnight. 041 "Antenna Rotation Speed" definition Antenna rotation period as measured between two consecutive North crossings or as averaged during a period of time. element 16 unsigned quantity 1/2^7 "s" remark Notes: - This item represents the antenna rotation period as measured by the radar station between two consecutive North crossings, or a calculated antenna rotation speed as averaged during a period of time, or during a number of antenna rotation scans. 050 "System Configuration and Status" definition Information concerning the configuration and status of a System. compound COM "Common Part" group NOGO "Operational Release Status of the System" element 1 table 0: System is released for operational use 1: Operational use of System is inhibited, i.e. the data shall be discarded by an operational SDPS RDPC "Radar Data Processor Chain Selection Status" element 1 table 0: RDPC-1 selected 1: RDPC-2 selected RDPR "Event to Signal a Reset/restart of the Selected Radar Data Processor Chain, I.e. Expect a New Assignment of Track Numbers" element 1 table 0: Default situation 1: Reset of RDPC OVLRDP "Radar Data Processor Overload Indicator" element 1 table 0: Default, no overload 1: Overload in RDP OVLXMT "Transmission Subsystem Overload Status" element 1 table 0: Default, no overload 1: Overload in transmission subsystem MSC "Monitoring System Connected Status" element 1 table 0: Monitoring system connected 1: Monitoring system disconnected TSV "Time Source Validity" element 1 table 0: Valid 1: Invalid spare 1 - - PSR "Specific Status Information for a PSR Sensor" group ANT "Selected Antenna" element 1 table 0: Antenna 1 1: Antenna 2 CHAB "Channel A/B Selection Status" element 2 table 0: No channel selected 1: Channel A only selected 2: Channel B only selected 3: Diversity mode ; Channel A and B selected OVL "Overload Condition" element 1 table 0: No overload 1: Overload MSC "Monitoring System Connected Status" element 1 table 0: Monitoring system connected 1: Monitoring system disconnected spare 3 SSR "Specific Status Information for a SSR Sensor" group ANT "Selected Antenna" element 1 table 0: Antenna 1 1: Antenna 2 CHAB "Channel A/B Selection Status" element 2 table 0: No channel selected 1: Channel A only selected 2: Channel B only selected 3: Invalid combination OVL "Overload Condition" element 1 table 0: No overload 1: Overload MSC "Monitoring System Connected Status:" element 1 table 0: Monitoring system connected 1: Monitoring system disconnected spare 3 MDS "Specific Status Information for a Mode S Sensor" group ANT "Selected Antenna" element 1 table 0: Antenna 1 1: Antenna 2 CHAB "Channel A/B Selection Status" element 2 table 0: No channel selected 1: Channel A only selected 2: Channel B only selected 3: Illegal combination OVLSUR "Overload Condition" element 1 table 0: No overload 1: Overload MSC "Monitoring System Connected Status:" element 1 table 0: Monitoring system connected 1: Monitoring system disconnected SCF "Channel A/B Selection Status for Surveillance Co-ordination Function" element 1 table 0: Channel A in use 1: Channel B in use DLF "Channel A/B Selection Status for Data Link Function" element 1 table 0: Channel A in use 1: Channel B in use OVLSCF "Overload in Surveillance Co-ordination Function" element 1 table 0: No overload 1: Overload OVLDLF "Overload in Data Link Function" element 1 table 0: No overload 1: Overload spare 7 060 "System Processing Mode" definition Status concerning the processing options, in use during the last antenna revolution, for the various Sensors, composing the System. compound COM "Common Part" group spare 1 REDRDP "Reduction Steps in Use for An Overload of the RDP" element 3 table 0: No reduction active 1: Reduction step 1 active 2: Reduction step 2 active 3: Reduction step 3 active 4: Reduction step 4 active 5: Reduction step 5 active 6: Reduction step 6 active 7: Reduction step 7 active REDXMT "Reduction Steps in Use for An Overload of the Transmission Subsystem" element 3 table 0: No reduction active 1: Reduction step 1 active 2: Reduction step 2 active 3: Reduction step 3 active 4: Reduction step 4 active 5: Reduction step 5 active 6: Reduction step 6 active 7: Reduction step 7 active spare 1 - - PSR "Specific Processing Mode Information for a PSR Sensor" group POL "Polarization in Use by PSR" element 1 table 0: Linear polarization 1: Circular polarization REDRAD "Reduction Steps in Use as Result of An Overload Within the PSR Subsystem" element 3 table 0: No reduction active 1: Reduction step 1 active 2: Reduction step 2 active 3: Reduction step 3 active 4: Reduction step 4 active 5: Reduction step 5 active 6: Reduction step 6 active 7: Reduction step 7 active STC "Sensitivity Time Control Map in Use" element 2 table 0: STC Map-1 1: STC Map-2 2: STC Map-3 3: STC Map-4 spare 2 SSR "Specific Processing Mode Information for a SSR Sensor" group REDRAD "Reduction Steps in Use as Result of An Overload Within the SSR Subsystem" element 3 table 0: No reduction active 1: Reduction step 1 active 2: Reduction step 2 active 3: Reduction step 3 active 4: Reduction step 4 active 5: Reduction step 5 active 6: Reduction step 6 active 7: Reduction step 7 active spare 5 MDS "Specific Processing Mode Information for a Mode S Sensor" group REDRAD "Reduction Steps in Use as Result of An Overload Within the Mode S Subsystem" element 3 table 0: No reduction active 1: Reduction step 1 active 2: Reduction step 2 active 3: Reduction step 3 active 4: Reduction step 4 active 5: Reduction step 5 active 6: Reduction step 6 active 7: Reduction step 7 active CLU "Cluster State" element 1 table 0: Autonomous 1: Not autonomous spare 4 remark Notes: - Applicable to all defined secondary subfields. The actual mapping between the up to seven data reduction steps and their associated data reduction measures is not subject to standardisation. 070 "Message Count Values" definition Message Count values, according the various types of messages, for the last completed antenna revolution, counted between two North crossings repetitive 8 group TYP "Type of Message Counter" element 5 table 0: No detection (number of misses) 1: Single PSR target reports 2: Single SSR target reports (Non-Mode S) 3: SSR+PSR target reports (Non-Mode S) 4: Single All-Call target reports (Mode S) 5: Single Roll-Call target reports (Mode S) 6: All-Call + PSR (Mode S) target reports 7: Roll-Call + PSR (Mode S) target reports 8: Filter for Weather data 9: Filter for Jamming Strobe 10: Filter for PSR data 11: Filter for SSR/Mode S data 12: Filter for SSR/Mode S+PSR data 13: Filter for Enhanced Surveillance data 14: Filter for PSR+Enhanced Surveillance 15: Filter for PSR+Enhanced Surveillance + SSR/Mode S data not in Area of Prime Interest 16: Filter for PSR+Enhanced Surveillance + all SSR/Mode S data COUNT "COUNTER" element 11 unsigned integer 090 "Collimation Error" definition Averaged difference in range and in azimuth for the primary target position with respect to the SSR target position as calculated by the radar station. group RNG "Range Error" element 8 signed quantity 1/2^7 "NM" AZM "Azimuth Error" element 8 signed quantity 360/2^14 "°" remark Notes: - Negative values are coded in two’s complement form. 100 "Generic Polar Window" definition Geographical window defined in polar co-ordinates. group RHOST "Rho Start" element 16 unsigned quantity 1/2^8 "NM" <= 256 RHOEND "Rho End" element 16 unsigned quantity 1/2^8 "NM" <= 256 THETAST "Theta Start" element 16 unsigned quantity 360/2^16 "°" THETAEND "Theta End" element 16 unsigned quantity 360/2^16 "°" 110 "Data Filter" definition Data Filter, which allows suppression of individual data types. element 8 table 0: Invalid value 1: Filter for Weather data 2: Filter for Jamming Strobe 3: Filter for PSR data 4: Filter for SSR/Mode S data 5: Filter for SSR/Mode S + PSR data 6: Enhanced Surveillance data 7: Filter for PSR+Enhanced Surveillance data 8: Filter for PSR+Enhanced Surveillance + SSR/Mode S data not in Area of Prime Interest 9: Filter for PSR+Enhanced Surveillance + all SSR/Mode S data remark Notes: 1. This Data Item is often used in conjunction with I034/100 and represents a Data Filter for a specific geographical subarea. A Data Source may have zero, one or multiple data filters active at any time. 2. If I034/110 is not accompanied with I034/100, then the Data Filter is valid throughout the total area of coverage. 120 "3D-Position Of Data Source" definition 3D-Position of Data Source in WGS 84 Co-ordinates group HGT "Height of Data Source" element 16 signed quantity 1 "m" LAT "Latitude" element 24 signed quantity 180/2^23 "°" >= -90 <= 90 LON "Longitude" element 24 signed quantity 180/2^23 "°" >= -180 <= 180 RE "Reserved Expansion Field" definition Expansion explicit re SP "Special Purpose Field" definition Special Purpose Field explicit sp uap 010 000 030 020 041 050 060 070 100 110 120 090 RE SP