Data Services Newsletter

Volume 4 : No 3 : September 2002

JEvalResp and JPlotResp versions 1.0 Released

Instrumental Software Technologies, Inc. (ISTI) today released versions 1.0 of the two software tools which they have developed under contract to IRIS. These two Java applications represent one of the best efforts so far to demonstrate CORBA connectivity to the IRIS DMC using the FISSURES framework.

JEvalResp

JEvalResp is a Java version of the ‘evalresp’ program and, like the original, it is designed to evaluate the response information from ASCIIRESP” files generated by rdseed (V4.1 and above). JEvalResp is also capable of fetching and processing responses from FISSURES servers.

The program searches for one or more responses that match a user-specified station (or set of stations), channel (or set of channels), network and date/time value. The output of the responses is then calculated for a user-specified set of frequencies, resulting in a list of amplitude/phase or complex-spectra values (written to output files).

JPlotResp

JPlotResp is a graphically-oriented Java program for processing and plotting the response information from ASCIIRESP” files generated by rdseed (V4.1 and above). JPlotResp is also capable of fetching and processing responses from FISSURES servers. The program searches for one or more responses that match a user-specified station (or set of stations), channel (or set of channels), network and date/time value. The output of the responses is then calculated for a user-specified set of frequencies, resulting in a list of amplitude/phase values that may be written to files or plotted. Lists of complex-spectra values may also be written to output files.

JPlotResp makes direct use of functions within JEvalResp to fetch and process response data. (JEvalResp is described above). To generate its plots, it uses JFreeChart as a graphing engine.

Currently these two tools are setup to connect to IRIS DMC, but connecting them to other FISSURES-compliant datacenters should be possible within the next year. Both JplotResp and JevalResp can be downloaded and installed easily from the following link: http://www.iris.washington.edu/software/downloads/

by Russ Welti (IRIS Data Management Center)

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