# Appendix D - Error Model Description

The error model implemented in Well Seeker is the ISCWSA MWD error model as described in SPE paper 67616 by H. Williamson. This paper contains a full explanation of the ISCWSA work. The error model used within this program uses the error terms and one sigma magnitudes described below.

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The model does not use any bias terms and it implements the latest misalignment and tool face independent terms as listed below.