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/NFI NASA Instrument Narrow Field Imager (NFI) 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 Narrow Field Imager (NFI) is a compact externally occulted coronagraph with a similar field of view to SOHO/LASCO-C3: from 6 to 32 solar radii on the sky. The external occulter blocks direct sunlight from entering the main optical aperture, which views the corona and starfield around the Sun using a compound lens system. Polarization is resolved using a polarizing filter wheel (PFW) assembly, and the image is digitized using a CCD camera assembly (CCA) with a 2kx2k active detector area. The PFW and CCA designs are common to both instruments. spase://SMWG/Person/Craig.E.DeForest PrincipalInvestigator The PUNCH Website https://punch.space.swri.edu/ Coronograph NFI spase://NASA/Observatory/PUNCH/NFI