# ewexport2ringserver Overview

(last revised April 23, 2015)

The ewexport2ringserver program collects data from an Earthworm export process and sends the data to an IRIS ringserver SeedLink server. If you are running an Earthworm system, you should consider using the ew2ringserver program instead. This version of the software is only needed if you must run it on a system without Earthworm and have access to an export feed from an Earthworm system on a different host.

All data are packaged as 512-byte miniSEED records allowing the destination ringserver to serve the the data via the SeedLink protocol. Ideally the ewexport2ringserver process is on the same machine or the same local network as the destination ringserver.

Due to the differences between Earthworm Tracebuf packet lengths and miniSEED records, the program maintains a small internal buffer for each time series. This allows the program to create full and efficient miniSEED records, but also introduces a slight delay or latency in the data transmission. The amount of delay depends on the sample rate of the data and the compressability of the series. For most purposes it is inconsequential.

The IRIS page for this program is here: IRIS Supported Software - ewexport2ringserver

For more information on the ringserver, visit: IRIS ringserver SeedLink server

For information on setting up this program and the ringserver SeedLink server, see the "HowTo-EW-SeedLink.txt" file included with the source code, or view the setup instructions on the IRIS site.
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