Skip to data content Skip to data search

Aircraft Meteorological Data Reports (AMDAR) and Aircraft Communications Addressing and Reporting System (ACARS) Data


AMDAR is the generally-accepted worldwide term for automated weather reports from commercial aircraft. The contribution of the United States to AMDAR is called MDCRS. MDCRS is funded jointly by the U.S. government and the seven participating airlines (American, Delta, Federal Express, Northwest, Southwest, United, and United Parcel Service). These U.S. data are also sometimes called ACARS.

Archive note

Time and spatial coverage may be incomplete. For access to more of this data or for data-specific questions such as format, coverage, or usage, please refer to the "AMDAR FAQ" documentation link or email ESRL/GSD listed as an "additional contact".

Due to an unexpected hardware failure the following files corresponding to 26 days during the year 2017 were lost (listed below):

Jan 6, 10, 17; Feb 11, 17, 18, 23, 24, 25; Mar 13, 22; Apr 6, 22, 29; May 6, 7, 22, 25; Jun 7, 8, 9, 10, 11, 12, 13, 14.

Data access

  • ORDER data for delivery by FTP

Additional information

Subscribe Subscribe to receive email when new or updated data is available.
Related projects
Spatial Type point
Frequency hourly
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 2009-10-28 00:00:00
End datetime 2022-05-23 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 90.00, Minimum (South) Latitude: -90.00
Minimum (West) Longitude: -180.00, Maximum (East) Longitude: 180.00

Primary point of contact information

EOL Data Support <>

Additional contact information


Example citation following ESIP guidelines:

Global Systems Division (GSD), Earth System Research Laboratory, NOAA. 2011. Aircraft Meteorological Data Reports (AMDAR) and Aircraft Communications Addressing and Reporting System (ACARS) Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 26 May 2022.

Today's date is shown: please replace with the date of your most recent access.

This dataset does not have a DOI. If you plan to cite this dataset, please email us to request a DOI, which will improve the searchability and cross-referencing of the citation.

Ancillary information

Metadata download

Note that your browser may not display the above metadata links, but automatically save them as files in a folder such as "Downloads"