asterix 008 "Monoradar Derived Weather Information" edition 1.2 date 2014-08-24 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: Polar vector 2: Cartesian vector of start point/length 3: Contour record 4: Cartesian start point and end point vector 254: SOP message 255: EOP message 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 defined SACs are on the EUROCONTROL ASTERIX website (www.eurocontrol.int/asterix) 020 "Vector Qualifier" definition Precipitation intensity level, shading orientation of the vectors representing the precipitation area and coordinate system used. extended ORG "" element 1 table 0: Local Coordinates 1: System Coordinates I "Intensity Level" element 3 unsigned integer S "Shading Orientation with Respect to North" element 3 table 0: 0° 1: 22.5° 2: 45° 3: 67.5° 4: 90° 5: 112.5° 6: 135° 7: 157.5° - spare 5 TST "" element 1 table 0: Default 1: Test vector ER "" element 1 table 0: Default 1: Error condition encountered - remark Note: For polar vectors bits-4/2 are meaningless and are set to zero. 034 "Sequence of Polar Vectors in SPF Notation" definition Sequence of weather vectors in local polar coordinates. repetitive 8 group STR "Start Range" element 8 unsigned quantity 1/2^7 "(NM)" remark Adjust with scaling factor '100/F' ENDR "End Range" element 8 unsigned quantity 1/2^7 "(NM)" remark Adjust with scaling factor '100/F' AZ "Azimuth" element 16 unsigned quantity 360/2^16 "°" remark Note: f is a parameter of the SOP message. 036 "Sequence of Cartesian Vectors in SPF Notation" definition Sequence of weather vectors, in the representation start point/length, in local or in system cartesian coordinates. repetitive 8 group X "X-Component" element 8 signed quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' Y "Y-Component" element 8 signed quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' LENGTH "Length" element 8 unsigned quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' remark Note: 1. LSB of [X, Y, L] is calculated as :math:`2^{-6+F}`. 2. F is a parameter of the SOP message. 3. Negative values are expressed in 2's complement form, bit-24 and bit-16 are set to 0 for positive values and 1 for negative values. 038 "Sequence of Weather Vectors in SPF Notation" definition Sequence of weather vectors, in the representation start point/ end point, in local or in system cartesian coordinates. repetitive 8 group X1 "X1-Component" element 8 signed quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' Y1 "Y1-Component" element 8 signed quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' X2 "X2-Component" element 8 signed quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' Y2 "Y2-Component" element 8 signed quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' remark Note: 1. LSB of [X1, Y1, X2, Y2] is calculated as :math:`2^{-6+f}`. 2. f is a parameter of the SOP message. 3. Negative values are expressed in 2's complement form, bits-32, 24, 16 and 8 are set to 0 for positive values and 1 for negative values. 040 "Contour Identifier" definition Contour serial number together with the precipitation intensity levels and the coordinates system used. group ORG "" element 1 table 0: Local Coordinates 1: System Coordinates I "Intensity Level" element 3 raw spare 2 FSTLST "" element 2 table 0: Intermediate record of a contour 1: Last record of a contour of at least two records 2: First record of a contour of at least two records 3: First and only record, fully defining a contour CSN "Contour Serial Number" element 8 raw remark Note: The Contour Serial Number provides an unambiguous identification for each contour record. Within one update cycle, a serial number shall never be assigned twice. 050 "Sequence of Contour Points in SPF Notation" definition Cartesian coordinates of a variable number of points defining a contour. repetitive 8 group X1 "" element 8 signed quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' Y1 "" element 8 signed quantity 1/2^6 "(NM)" remark Adjust with scaling factor '100/F' remark Note: 1. LSB of [X1, Y1] is calculated as :math:`2^{-6+f}`. 2. f is a parameter of the SOP message. 3. Negative values are expressed in 2's complement form, bit-16 and bit-8 shall be set to 0 for positive values and 1 for negative values. 090 "Time of Day" definition Absolute time stamping expressed as Coordinated Universal Time (UTC) time. element 24 unsigned quantity 1/2^7 "s" remark Notes: 1. The time of day value is reset to zero each day at midnight. 2. For time management in radar transmission applications, refer to Part 1, paragraph 5.4 [Ref. 1]. 100 "Processing Status" definition Information concerning the scaling factor currently applied, current reduction step in use, etc. extended F "Scaling Factor" element 5 signed integer R "Current Reduction Stage in Use" element 3 raw Q "Processing Parameters" element 15 raw - remark Note: F: Scaling factor, negative values are represented in 2's complement form, bit-24 is set to 0 for positive values and 1 for negative values. R: Current reduction stage in use. Normal operation is indicated by a value of zero. The actual bit signification is application dependent. Q: Processing parameters. The actual bit signification isapplication dependent. 110 "Station Configuration Status" definition Information concerning the use and status of some vital hardware components of a radar system . repetitive fx element 7 raw remark Note: Due to the diversity in hardware design and requirements of present and future radar stations, it is felt impractical to attempt to define individual bits. 120 "Total Number of Items Constituting One Weather Picture" definition Total number of vectors, respectively contour points, constituting the total weather image, provided with the EOP message. element 16 unsigned integer SP "Special Purpose Field" definition Special Purpose Field explicit sp RFS "Random Field Sequencing" definition Random Field Sequencing rfs uap 010 000 020 036 034 040 050 090 100 110 120 038 SP RFS