asterix 019 "Multilateration System Status Messages"
edition 1.3
date 2010-12-01
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
            information.
        element 8
            table
                1: Start of Update Cycle
                2: Periodic Status Message
                3: Event-triggered Status Message
        remark
            NOTES:
              1. In applications where data of various types is 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.

    010 "Data Source Identifier"
        definition
            Identification of the system from which the data is 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).

    140 "Time of Day"
        definition
            Absolute time stamping expressed as UTC.
        element 24
            unsigned quantity 1/2^7 "s"
        remark
            Note:

                The time of day value is reset to zero each day at midnight.

    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
                        3: Undefined
            OVL "Overload Indicator"
                element 1
                    table
                        0: No overload
                        1: Overload
            TSV "Time Source Validity"
                element 1
                    table
                        0: Valid
                        1: Invalid
            TTF "Test Target"
                element 1
                    table
                        0: Test Target Operative
                        1: Test Target Failure
            spare 3
        remark
            Note:

                A time source is considered as valid when either externally synchronised
                or running on a local oscillator within the required accuracy of UTC.

    551 "Tracking Processor Detailed Status"
        definition
            Information concerning the configuration and status of the Tracking processors.
        group
            TP1A ""
                element 1
                    table
                        0: Standby
                        1: Exec
            TP1B ""
                element 1
                    table
                        0: Faulted
                        1: Good
            TP2A ""
                element 1
                    table
                        0: Standby
                        1: Exec
            TP2B ""
                element 1
                    table
                        0: Faulted
                        1: Good
            TP3A ""
                element 1
                    table
                        0: Standby
                        1: Exec
            TP3B ""
                element 1
                    table
                        0: Faulted
                        1: Good
            TP4A ""
                element 1
                    table
                        0: Standby
                        1: Exec
            TP4B ""
                element 1
                    table
                        0: Faulted
                        1: Good
        remark
            Note:

                Both Bits of one TP set to zero means, that this TP is not used
                in the system.

    552 "Remote Sensor Detailed Status"
        definition
            Information concerning the configuration and status of the Remote Sensors (RS)
        repetitive 8
            group
                RSI "8-bit Identification Number of RS"
                    element 8
                        raw
                spare 1
                RS1090 "Receiver 1090 MHz"
                    element 1
                        table
                            0: Not present
                            1: Present
                TX1030 "Transmitter 1030 MHz"
                    element 1
                        table
                            0: Not present
                            1: Present
                TX1090 "Transmitter 1090 MHz"
                    element 1
                        table
                            0: Not present
                            1: Present
                RSS "RS Status"
                    element 1
                        table
                            0: Faulted
                            1: Good
                RSO "RS Operational"
                    element 1
                        table
                            0: Offline
                            1: Online
                spare 2

    553 "Reference Transponder Detailed Status"
        definition
            Information concerning the configuration and status of the Reference Transponder.
        extended
            REFTR1 "Ref Trans 1 Status"
                element 2
                    table
                        1: Warning
                        2: Faulted
                        3: Good
            spare 2
            REFTR2 "Ref Trans 2 Status"
                element 2
                    table
                        1: Warning
                        2: Faulted
                        3: Good
            spare 1
            -
            REFTR3 "Ref Trans 3 Status"
                element 2
                    table
                        1: Warning
                        2: Faulted
                        3: Good
            spare 2
            REFTR4 "Ref Trans 4 Status"
                element 2
                    table
                        1: Warning
                        2: Faulted
                        3: Good
            spare 1
            -

    600 "Position of the MLT System Reference Point"
        definition
            Position of the MLT reference point in WGS-84 Coordinates.
        group
            LAT "Latitude"
                element 32
                    signed quantity 180/2^30 "°" >= -90 <= 90
            LON "Longitude"
                element 32
                    signed quantity 180/2^30 "°" >= -180 < 180

    610 "Height of the MLT System Reference Point"
        definition
            Height of the MLT system reference point in two’s complement form.
            The height shall use mean sea level as the zero reference level.
        element 16
            signed quantity 1/2^2 "m" >= -8192 <= 8192

    620 "WGS-84 Undulation"
        definition
            WGS-84 undulation value of the MLT system reference point, in meters.
            Geoid undulation value is the difference between the ellipsoidal height
            and the height above mean sea level
        element 8
            signed quantity 1 "m"

    RE "Reserved Expansion Field"
        definition
            Expansion
        explicit re

    SP "Special Purpose Field"
        definition
            Special Purpose Field
        explicit sp

uap
    010
    000
    140
    550
    551
    552
    553
    600
    610
    620
    -
    -
    RE
    SP