asterix 009 "Composite Weather Reports"
edition 2.1
date 2014-10-22
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
                2: Cartesian vector
                253: Intermediate-update-step message
                254: Start-of-picture message
                255: End-of-picture 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
            This Data Item defines the orientation of the following sequence
            of Cartesian vectors, their intensity level and the relevant
            coordinate system.
        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°
            -
        remark
            For polar vectors "S-bits" are meaningless and shall be set to zero.

    030 "Sequence of Cartesian Vectors"
        definition
            Sequence of weather vectors in local or system Cartesian coordinates.
        repetitive 8
            group
                X "X-coordinate"
                    element 16
                        signed quantity 1/2^6 "(NM)"
                    remark
                        Adjust with scaling factor '080/F'
                Y "Y-coordinate"
                    element 16
                        signed quantity 1/2^6 "(NM)"
                    remark
                        Adjust with scaling factor '080/F'
                L "Vector Length"
                    element 16
                        unsigned quantity 1/2^6 "(NM)"
                    remark
                        Adjust with scaling factor '080/F'
        remark
            'F' shall be incorporated as a parameter in the SOP message.

    060 "Synchronisation/Control Signal"
        definition
            This Data Item provides the serial Step Number.
        extended
            SN "Step Number"
                element 6
                    unsigned integer
            spare 1
            -

    070 "Time of Day"
        definition
            Absolute time stamping expressed as UTC time.
        element 24
            unsigned quantity 1/2^7 "s"
        remark
            The time of day value is reset to zero each day at midnight.

    080 "Processing Status"
        definition
            Processing status of the Track Server.
        extended
            F "Scaling Factor"
                element 5
                    signed integer
            R "Current Reduction Stage in Use"
                element 3
                    raw
            Q "Processing Parameters"
                element 15
                    raw
            -

    090 "Radar Configuration and Status"
        definition
            Current radar configuration and status of all operational radars.
        repetitive 8
            group
                SAC "SAC of Radar Concerned"
                    element 8
                        raw
                SIC "SIC of Radar Concerned"
                    element 8
                        raw
                spare 3
                CP "Circular Polarisation"
                    element 1
                        raw
                WO "Weather Channel Overload"
                    element 1
                        raw
                R "Reduction Step in Use By Radar  Concerned"
                    element 3
                        raw

    100 "Vector Count"
        definition
            Total number of vectors defining a complete weather picture.
        element 16
            unsigned integer

uap
    010
    000
    020
    030
    060
    070
    080
    090
    100