# WFI focal plane persistence decay curves

![WFI focal plane persistence decay curves](https://assets.science.nasa.gov/dynamicimage/assets/science/missions/rst/science/WFI_focal_plane_persistence_decay_curves.png?w=1600&fit=clip)

- Released: January 30, 2026
- Category: infographics
- Credit: NASA
- NASA source: https://science.nasa.gov/mission/roman-space-telescope/wfi-technical/
- Page: https://roman.mixinvisuals.com/image/pd538a1309480/wfi-focal-plane-persistence-decay-curves/

WFI focal plane persistence decay curves. Curves are shown for each SCA in the focal plane during a series of dark measurements that occurred after 56 frames of ~900 e - /s flat field illumination. These measurements were performed during WFI TVAC2 with the…