ULT resolvers come with angular error map (AEM)
Frameless Pancake Resolvers
ULT resolvers range 3-15-in. diameter with holes 2.5-14 in.and come with an angular error map (AEM) that allows electronic compensation for mechanical errors. AEM-corrected resolvers provide absolute position information within one revolution. Operating temperatures range is -40[degree] C, and 16-bit resoultion is typical, with higher resolutions available.