TAMDAR (Tropospheric Airborne Meteorological Data Reporting) is an observing system which provides reports from commercial aircraft during flight. The TAMDAR system was developed by AirDat LLC, which retains a proprietary interest in their data and therefore sets the rules regarding to whom and how it may be redistributed.

TAMDAR data are stored in the NCEP development observational database as BUFR type/subtype b004/xx010 but are not yet assimilated into the NCEP models. NCEP receives the TAMDAR data from the NWS TOC, which first receives the TAMDAR bulletins directly from AirDat.

In addition to the above database file, TAMDAR data are also present in model dump files containing the names aircar and aircft, as well as in most PREPBUFR files.

The restriction(s):

• TAMDAR data can be used in real time by the U.S. Government and can be combined with other datasets by the U.S. Government to produce derived products (model output). These derived products can be publicly distributed without restrictions provided that TAMDAR data is not viewable in these derived products. There is a 48 hour delay prior to other distribution of TAMDAR data.

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Page last modified: Monday, 10-Dec-2007 21:18:51 GMT