This work item is for the revision of D2163 so that improved precision is obtained. Industry and commercial feedback was received at the June 2016 Subcommittee D meeting in Bellevue, Washington. A Task Group has been formed at Subcommittee D and shall be chaired by George Gonzalez. Subcommittee H shall be informed and consulted prior to and during this work. Industry experts are invited to collaborate in this effort.