# Earthworm Program:
ew2ringserver Overview

(last revised April 22, 2015)

The ew2ringserver program collects TRACEBUF2 or TYPE_MSEED messages from an Earthworm ring and sends 512-byte miniSEED records to an IRIS ringserver SeedLink server.
For TRACEBUF2 messages, the data are buffered and packed into 512-byte miniSEED records. For TYPE_MSEED messages, if the detected record length is 512 bytes then it is forwarded to the ringserver unmodified; otherwise it is ignored.
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.

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

For instructions on how to create a SeedLink server for Earthworm, visit: A SeedLink server for Earthworm
Module Index | ew2ringserver Commands