ASTERIX Category 008 - Monoradar Derived Weather Information

Transmission of monoradar derived weather information. More...

Collaboration diagram for ASTERIX Category 008 - Monoradar Derived Weather Information:

Topics
	Data Item I008/000 - Message Type
	Type of weather message.
	Data Item I008/010 - Data Source Identifier
	Identification of the radar station from which the data are received.
	Data Item I008/020 - Vector Qualifier
	Precipitation intensity level, shading orientation and coordinate system.
	Data Item I008/034 - Sequence of Polar Vectors in SPF Notation
	Sequence of weather vectors in local polar coordinates.
	Data Item I008/036 - Sequence of Cartesian Vectors in SPF Notation
	Sequence of weather vectors in start point/length representation.
	Data Item I008/038 - Sequence of Weather Vectors in SPF Notation
	Sequence of weather vectors in start point/end point representation.
	Data Item I008/040 - Contour Identifier
	Contour serial number with precipitation intensity levels.
	Data Item I008/050 - Sequence of Contour Points in SPF Notation
	Cartesian coordinates of points defining a contour.
	Data Item I008/090 - Time of Day
	Absolute time stamping expressed as UTC time.
	Data Item I008/100 - Processing Status
	Information concerning the scaling factor and processing parameters.
	Data Item I008/110 - Station Configuration Status
	Information concerning use and status of vital hardware components.
	Data Item I008/120 - Total Number of Items Constituting One Weather Picture
	Total number of vectors or contour points in the weather image (EOP message).
	Data Item I008/SPF - Special Purpose Field
	Special purpose field (FRN 13 SP Indicator).
	Data Item I008/RFS - Random Field Sequencing
	Random field sequencing field (FRN 14 RFS Indicator).
	Data Record I008 - Monoradar Derived Weather Information
	Complete data record for Category 008 messages.

Detailed Description

Transmission of monoradar derived weather information.

Overview:

This category defines the transmission of relatively simple meteorological images of precipitation areas of various intensity levels from a radar station to one or more Radar Data Processing (RDP) systems.

Weather data representations:

• Polar Vectors: Shaded areas expressed in local polar coordinates
• Cartesian Vectors: Parallel vectors in cartesian coordinate system
• Contours: Consecutive summit points defining closed area contours

Control messages:

• Start of Picture (SOP): Signals start of new data renewal cycle
• End of Picture (EOP): Signals end of data renewal cycle

Message Types (I008/000):

• 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

Data Items:

• I008/000 Message Type
• I008/010 Data Source Identifier
• I008/020 Vector Qualifier
• I008/034 Sequence of Polar Vectors in SPF Notation
• I008/036 Sequence of Cartesian Vectors in SPF Notation
• I008/038 Sequence of Weather Vectors in SPF Notation
• I008/040 Contour Identifier
• I008/050 Sequence of Contour Points in SPF Notation
• I008/090 Time of Day
• I008/100 Processing Status
• I008/110 Station Configuration Status
• I008/120 Total Number of Items Constituting One Weather Picture
• I008/SPF Special Purpose Field
• I008/RFS Random Field Sequencing

Scaling Factor:

Data items expressing a distance (I008/034, I008/036, I008/038 and I008/050) are decoded into raw integer values. The real value in NM is the raw value multiplied by the LSB 2^(-7+f) NM (range) respectively 2^(-6+f) NM (length and coordinates), where the scaling factor f is a parameter of the SOP message (Data Item I008/100).