# Earthworm Module:
Debias Overview

(last revised 24 February, 2010)

The debias module implements a rolling-average filter routine to process wave data (TYPE_TRACEBUF2) coming from the InRing defined in debias.d. Debiased trace messages are written to the OutRing with their SCNs changed as specified in debias.d. The debiased trace message retains its TYPE_TRACEBUF2 type, but it has a new SCNL name. The size of the window used to compute the average is specified in seconds in debias.d.

Debias may cause some time delay at the beginning of each span of contiguous records, as it needs to fill the window to begin computing the averages used to debias the data; once the window is full, it can catch up and continue with little delay.

Module Index | Debias Configuration File