TDS ver. 1.3 (January 2010)
Updates since release
Current data is now available in gzipped, CSV format.
The current data directory format is consistent with the dataserver release directory structure:
- Commas in the raw text of AIR/SIGMETs reports are now
handled correctly for CSV output.
New features/Performance Enhancements
- There is now a new mostRecentForEachStation type ('constraint') that
offers improved performance. Please visit the
Best Practices page for more details
on the effective use of this constraint. Please refer to:
for examples of TAF mostRecentForEachStation queries and
Examples for examples of METAR mostRecentForEachStation queries.
Users can obtain the most recent data using two different methods:
'postfilter' and 'constraint'. The 'postfilter' method is the same as
mostRecentForEachStation=true in earlier versions of the server. For this
and subsequent versions, mostRecentForEachStation=true will still behave as
before. The postfilter method allows all other constraints to be applied
first, then the results obtained from those constraints are filtered to
yield the most recent for each station. The constraint method is a more
straightforward, optimal means of obtaining the most recent for each
NOTE:The mostRecentForEachStation feature is available only for METARs and TAFs, and only 72 hours worth of data is kept in the data base.
Most Current Data
The most current data is available for METARs, TAFs,
PIREPs and AIRSIGMETs.
Please visit Current Data for more details.
- Results are in XML and CSV format and are gzip compressed. The
data resides at:
and to be consistent with the dataserver release directories:
- This data is useful for users who require the most currently
- The load to the dataserver is minimized as the need for multiple,
similar requests for large quantities of data is unnecessary.
- Queries are made every five minutes throughout the day.
The following schemas are relevant for the 1_3 release: