A polarimeter's function could be integrated with another instrument, like a camera, or the Voyager photopolarimeter that brings together capabilities with a photometer. Most interplanetary missions are flown to collect science data. The exceptions are spacecraft like Deep Space 1, whose objective was to show new technologies and validate them https://juliussvubr.blogdosaga.com/28779416/rumored-buzz-on-ais-interlock