Complex types and enumerations shared among schemas.
Describes the upper and lower limits of a layer above the aerodrome.
This is needed for a number of weather elements, including non-convective low level wind
shear, icing, turbulence, and volcanic ash.
Measured or estimated lower limit (height) of phenomenon.
Measured or estimated upper limit (height) of phenomenon.
Free format text provided by the forecaster to provide additional
information on the entire product or region(s) not encoded elsewhere.
Text entered by forecaster regarding any aspect of the SIGMET not
already incorporated/included into the document.
Additional information regarding the composition and generation of the
observation and/or forecast product.
Reference to authoritative sources that governs and elucidates
the process by which the meteorological observation or forecast is
made.
Reference to documentation on the user-supplied aspects of the
observation platform.
A nillable Length quantity. Unlike the base Length measure, references
to this type may be nil and include a nilReason.
A nillable Measure quantity. Unlike the base Measure, references to this
type may be nil and may include a nilReason.
The present weather observed at, or in near vicinity of, an aerodrome.
Only a specific set of weather phenomenon are reported within aviation meteorology as
defined in Regulation ICAO Annex 3 / WMO No. 49-2.
This CodeList is specifically defined for aviation purposes as defined in WMO
No. 49-2. A superset of definitions are defined in WMO No. 306 Vol I.1 code-table 4678
"Significant weather phenomena".
http://codes.wmo.int/49-2/AerodromePresentOrForecastWeather
none
Amount of cloud - assessed by category:
- Sky clear (0 oktas)
- Few (1 - 2 oktas)
- Scattered (3 - 4 oktas)
- Broken (5 - 7 oktas)
- Overcast (8 oktas)
This CodeList is specifically defined for aviation purposes, as defined in WMO
No. 49-2. A superset of cloud-amount categories are defined in WMO No. 306 Vol I.2 FM 94
BUFR code-table 0 20 008 "Cloud distribution for aviation".
http://codes.wmo.int/49-2/CloudAmountReportedAtAerodrome
none
RelationalOperator defines the restricted set of operators that may be
specified alongside numerical quantities.
These operators are used in cases where a precise value is not measurable, not precisely
known due to measurement limitations, or not reported due to reporting restrictions.
For example, the "BELOW" operator in conjunction with the reported quantity 1/4
indicates that the actual physical quantity is below 1/4 (at most 1/4).
The actual value is above the maximum value that can be
determined by the system.
The actual value is below the minimum value that can be
determined by the system.