Go to CAV-TEC V2.0 Data Types

Definition
Functional Requirements
Syntax
Semantics
Conformance
Performance

1 Definition

Weather Data is a Data Type representing the meteorological conditions relevant to the operation of a Connected Autonomous Vehicle, including temperature, humidity, pressure, precipitation, wind, fog, and ice.

2 Functional Requirements

Weather Data shall represent the following meteorological measurements:

  • Temperature.
  • Relative Humidity.
  • Air Pressure.
  • Ice presence.
  • Wind Conditions.
  • Fog.
  • Rain.
  • Hail.
  • Snow.
  • Sleet.

A Numeric Measurement has a Value (number, required), an Accuracy (absolute 1-sigma / RMS uncertainty), a Confidence in [0..1] and a Unit symbol (e.g., K, %RH, Pa, m/s). A Boolean Measurement has a Value (boolean, required) and a Confidence in [0..1].

3 Syntax

https://schemas.mpai.community/CAV2/V2.0/data/WeatherData.json

4 Semantics

Table 1 specifies the semantics of the Weather Data Data Type.

Table 1 – Semantics of the Weather Data Data Type

Label Type Req. Description
Header string (CAV-WDT-V2.0) Yes Weather Data Header – Standard CAV-WDT-Vx.y.
MInstanceID string Identifier of the M-Instance (Virtual Space) associated with this Weather Data instance.
UEnvironmentID string Identifier of the U-Environment (Real Space) associated with this Weather Data instance.
WeatherDataID string Yes Unique identifier of this Weather Data instance.
WeatherDataTime Simple Time Time this Weather Data instance was produced.
WeatherData object Yes Set of meteorological measurements.
WeatherData.Temperature Numeric Measurement Air temperature.
WeatherData.RelativeHumidity Numeric Measurement Relative humidity (%).
WeatherData.AirPressure Numeric Measurement Air pressure (Pa).
WeatherData.Ice Boolean Measurement Presence of ice.
WeatherData.WindConditions[] object [] Wind conditions as a set of wind vectors.
WeatherData.WindConditions[].Azimuth Numeric Measurement Yes Wind azimuth (deg, 0-360).
WeatherData.WindConditions[].Elevation Numeric Measurement Wind elevation angle (deg).
WeatherData.WindConditions[].Velocity Numeric Measurement Yes Wind speed (m/s).
WeatherData.Fog Numeric Measurement Fog density / visibility.
WeatherData.Rain Numeric Measurement Rain precipitation rate (mm/h).
WeatherData.Hail Numeric Measurement Hail precipitation rate (mm/h).
WeatherData.Snow Numeric Measurement Snow precipitation rate (mm/h).
WeatherData.Sleet Numeric Measurement Sleet precipitation rate (mm/h).
DataXMData Data Exchange Metadata MPAI-PTF Data Exchange Metadata providing provenance, authorisation, legal, security, and confidence information associated with this Weather Data instance in a trusted data exchange context.
DescrMetadata string Human-readable descriptive metadata of the Weather Data instance (plain text, max 2048 characters).

5 Conformance Testing

Data conform to the Weather Data Data Type when they validate against its schema. If the schema references other schemas, data referencing a secondary schema shall also validate against that schema, if present, and conform with the Qualifier, if present.

6 Performance Assessment