Station and Channel metadata
Station and channel metadata are provided by the FDSN station webservice as:
- StationXML files (a modern expression of metadata defined by the FDSN);
- Text (using the text symbol ‘|’ as separator.
Full response metadata is available as
- StationXML files , delivered by the FDSN station webservice;
- RESP files (Seed Manual, Standard for Earthquake Exchange Data), delivered by the Résif resp webservice;
- SACPZ files (SAC manual), delivered by the Résif sacpz webservice;
- plots, delivered by the Résif evalresp webservice.
Résif metadata are entirely constructed by data producers, who submit them to the data center; the latter does not modify them. They are checked at the time of their submission in order to meet quality criteria defined within Résif-S In particular, all metadata is checked and validated station-validator (list of rules).
StationXML versus SEEDdataless
As of 2015, the FDSN no longer supports the SEED dataless metadata format (previously used for metadata exchange), which is replaced by the StationXML format. Conversion tools exist to ensure the continuity of applications that would need metadata in the SEED dataless metadata format. In addition, the webservice resp allows you to obtain metadata in RESP SEED format.
It is possible to convert a StationXML volume into a SEED dataless volume by using the IRIS (java) conversion tool.
FULLSEED format versus miniSEED and StationXML
The notion of a complete SEED volume, which guaranteed the user a complete description of the data with associated metadata in a single volume, no longer exists. The recovery of data and metadata is done separately, through different web services. By construction, Résif-DC does not deliver any data for which the corresponding metadata is not available, but data and metadata must be obtained separately. See our section on webservices.
Data availability information
Data availability information: segments, gaps, overlaps, quality flags, is delivered by the FDSN availability webservice
See our webservices pages for examples.
Data quality and metrics
Detailed information on the contents of waveform data including quality control parameters, sample metrics, record header flags, and timing quality is available as json file, using the EIDA WFCatalog webservice.