2.7.2 https://spdx.org/licenses/ SPDX 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/NumericalData/PUNCH/WFI/1/Level3/CF1/P4D NASA NumericalData PUNCH Level 3 WFI-1 Clear F-Corona Model https://doi.org/10.48322/3dne-5k54 2026-08-19T15:26:15Z 2026-08-04T00:08:46Z Only known prior ReleaseDate of the metadata 2026-08-19T15:26:15Z Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Added DOI. TLK PUNCH Level 3 clear F-corona model derived from Wide Field Imager 1 (WFI-1) observations and represented in the PUNCH mosaic frame, with a corresponding uncertainty array. The FITS file also includes a table containing file-processing provenance. This dataset is a member of the Collection of PUNCH Level-3 Science Image datasets. Per instructions from the PUNCH team, reference to the entire Collection, including the DOI below, should be used when this and other member datasets in the Collection are cited: Southwest Research Institute (2025). PUNCH NFI-WFI Level-3 Science images [Collection]. Solar Data Analysis Center. https://doi.org/10.48322/nnv7-bn21. Access date (assigned on date of landing page access). Southwest Research Institute 2026-03-31T00:00:00Z Solar Data Analysis Center spase://SMWG/Person/Craig.E.DeForest PrincipalInvestigator spase://SMWG/Person/J.Marcus.Hughes TeamLeader spase://SMWG/Person/Chris.Lowder TeamMember spase://SMWG/Person/Derek.A.Lamb TeamMember spase://SMWG/Person/Samuel.J.VanKooten TeamMember spase://SMWG/Person/Ritesh.Patel TeamMember spase://SMWG/Person/Daniel.B.Seaton TeamMember The PUNCH Website https://punch.space.swri.edu/ spase://NASA/Collection/PUNCH/NFI_WFI/Level3/PT4M PartOf spase://SMWG/Repository/SDAC Online Open https://spdx.org/licenses/ SPDX CC-BY-4.0 https://spdx.org/licenses/CC-BY-4.0.html Creative Commons Attribution 4.0 International CC BY 4.0 is the license specified in the PUNCH CF1 FITS files https://umbra.nascom.nasa.gov/punch/3/CF1/ FITS None spase://NASA/Instrument/PUNCH/WFI/1 ImageIntensity 2025-07-24T00:00:00Z -P10D P4D Sun Sun.Corona spase://NASA/NumericalData/PUNCH/WFI/1/Level1/CR1/PT8M FITS Extension #1 Data Array PUNCH Level 3 unpolarized F-corona model derived from WFI-1 observations and represented in the PUNCH mosaic coordinate frame. The data are stored as a compressed 4096 by 4096 floating-point image. The image uses helioprojective longitude and latitude coordinates with an ARC projection and a pixel scale of 0.0225 degrees, or 81 arcsec, at the reference point. The nominal wavelength is 530 nm. The reference time of the model is specified by the DATE-OBS FITS keyword. 2.009e+07 W m^-2 sr^-1 Electromagnetic Intensity 530 530 nm FITS Extension #2 Uncertainty Array Reciprocal fractional uncertainty associated pixel by pixel with the WFI-1 clear F-corona model in FITS extension 1. The stored value is the model intensity divided by its absolute uncertainty. The array size is 4096 by 4096 by 1. Dimensionless Uncertainty DataQuality