Acknowledgement

OSOP would like to thank Dr. Erhard Weilandt, the father of modern seismometry, for his incredible generosity and openness in all matters seismology. OSOP would also like to thank IRIS for sponsoring the Data Management Classes and inviting Dr. Wielandt to lecture and inviting us to listen.

The OSOP Calibration Table is a modification of a commercially available table that was designed by Dr. Wieland who encouraged all of his students to make one.on their own  He has even published plans to do it yourself calibration table.  You can follow this link to build your own calibration table: Plywood Step-Table: instructions for assembly..

You can find many programs written by Dr. Weiland at his web page http://www.software-for-seismometry.de/. The osopcal software provided with the OSOP Calibration Table is an improvement of his dispcal and tiltcal programs.

Finally, OSOP would like to thank the folks at Lennartz GmbH.