2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/Instrument/PUNCH/WFI/2 NASA Instrument Wide Field Imager (WFI) 2026-02-02T13:11:23Z 2025-01-09T00:08:46 Only known prior ReleaseDate of the metadata 2026-02-02T13:11:23Z Added MetadataRightsList. Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB Wide Field Imager (WFI) is a wide-field heliospheric imager (HI) design based on STEREO/HI. It images from 18 to 180 solar radii on the sky. HI designs are analogous to coronagraphs, but in linear instead of circular geometry. WFI attenuates direct sunlight by over 16 orders of magnitude. The wide-field achromatic optics are based on the famous Nagler eyepiece in reverse geometry. Polarization and detection use the same PFW and CCA designs as NFI. PUNCH includes three copies of WFI, to achieve the required observing cadence. spase://SMWG/Person/Craig.E.DeForest PrincipalInvestigator The PUNCH Website https://punch.space.swri.edu/ Imager WFI spase://NASA/Observatory/PUNCH/WFI/2