# Earthworm Module:
Ewdrift Overview

(last revised 9 February, 2012)

The Ewdrift module calculates the drift from the first channel's wave data (TYPE_TRACEBUF2) coming from the InRing defined in ewdrift.d from the second channel's wave data and then divided by some conversion factor constant (which is the height difference between the 2 sensors.) Processed trace messages are written to the OutRing with their SCNLs changed as specified in ewdrift.d.

Module Index | Ewdrift Configuration File