default User guide for Artemis with convergence and range dependence

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User guide for Artemis with convergence and range dependence. Harrison, Chris H. CMRE-SP-2014-001. September 2014.

Artemis is a sonar performance model that calculates target echo level and reverberation in a range-dependent environment. Unlike earlier versions that were based on energy flux [Harrison, NURC Report: NURC-FR-2011-009, (2011)], this version includes caustics and ray convergence effects using a technique described in [Harrison, Journal of the Acoustical Society of America, 133, 3777-3789, (2013)].