Aircraft Meteorological Data Relay (AMDAR) is a program initiated by the
World Meteorological Organization.
AMDAR is used to collect meteorological data worldwide by using commercial
aircraft.
Data is collected by the aircraft navigation systems and the onboard standard
temperature and
static pressure probes.
The data is then preprocessed before linking them down to the ground either via
VHF
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter.
Frequencies immediately below VHF ...
communication (
ACARS
In aviation, ACARS (; an acronym for Aircraft Communications Addressing and Reporting System) is a digital datalink system for transmission of short messages between aircraft and ground stations via airband radio or satellite. The protocol was des ...
)
or via
satellite link
ASDAR.
A detailed description is given in the AMDAR Reference Manual (WMO-No 958) available from the
World Meteorological Organization,
Geneva,
Switzerland
). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
[https://library.wmo.int/doc_num.php?explnum_id=9026 ]
Usage
AMDAR transmissions are most commonly used in
forecast models as a supplement to
radiosonde data, to aid in the plotting of upper-air data between the standard radiosonde soundings at 00Z and 12Z.
References
External links
WMO AMDAR Observing System siteNOAA AMDAR site
Meteorological data and networks
Meteorological instrumentation and equipment
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