PSN-L Email List Message

Subject: Wielandt article updates
From: Brett Nordgren bnordgren@..............
Date: Mon, 15 May 2000 23:20:06 -0400

About ten days ago, Prof. Erhard Wielandt, who has pioneered the 
development of force-feedback seismometers, updated his online paper titled 
"Seismic Sensors and Their Calibration", which may be found at

This an excellent overview of the issues involved in the design of feedback 

He has also revised and expanded his article "Seismometry" at


Brett Nordgren

Public Seismic Network Mailing List (PSN-L)

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Larry Cochrane <cochrane@..............>