Station response information is part of the SEED data format. You can extract responses from a SEED volume using rdseed OR you can view response information directly from our database using SeismiQuery.
For users familiar with the BREQ_FAST request format, a BREQ_FAST request can be sent to DATALESS@iris.washington.edu to request a dataless SEED file containing metadata for the requested stations.
For real-time data, the BUD Query Interface now offers the option of requesting a dataless SEED file as a part of the data selection process. A dataless SEED file for all channels in BUD is available via FTP as well. For more information, please consult the BUD start page.