2.7.2 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/NumericalData/PUNCH/NFI_WFI_Mosaic/Level3/CTM/PT8M NASA NumericalData PUNCH Level 3 Clear K-Corona Mosaic Data 2026-08-24T00:08:46Z PUNCH Level 3 clear K-corona science mosaic (trefoil) images in the clear polarization state. The images are background-subtracted, including F-corona and starfield subtraction, and resolved into unpolarized brightness (B) with uncertainty. This dataset is a member of the Collection of PUNCH Level-3 Science Image dataset. Per instructions from the PUNCH team, reference to the entire Collection (including the DOI, see below) should be used when this and other member datasets in the Collection are needed for citation purposes: 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 2026-04-01T00:00:00Z 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/ HelioData https://helio.data.nasa.gov/dataset/PUNCH_NFI_WFI_Mosaic_Level3_CTM_PT8M The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more. 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 FITS files Solar Data Analysis Center (SDAC) https://umbra.nascom.nasa.gov/punch/3/CTM/ FITS None spase://NASA/Instrument/PUNCH/NFI spase://NASA/Instrument/PUNCH/WFI/1 spase://NASA/Instrument/PUNCH/WFI/2 spase://NASA/Instrument/PUNCH/WFI/3 ImageIntensity Radiance 2025-06-22T00:00:29Z -P2M PT8M Sun Sun.Corona spase://NASA/NumericalData/PUNCH/NFI_WFI_Mosaic/Level3/CIM/PT8M FITS Extension #1 Brightness Unpolarized K-corona brightness in the PUNCH Level 3 CTM composite mosaic, provided in output coordinates. The data are stored in FITS extension 1 as a 4096 x 4096 image; the FITS EXTNAME is "PRIMARY DATA ARRAY". 2.009e+07 W m^-2 sr^-1 Electromagnetic Intensity 450 750 nm FITS Extension #2 Inverse Fractional Uncertainty Inverse fractional uncertainty associated with the unpolarized K-corona brightness in the PUNCH Level 3 CTM composite mosaic. The stored value is the brightness divided by its uncertainty. The data are stored in FITS extension 2 as a 4096 x 4096 image; the FITS EXTNAME is "UNCERTAINTY ARRAY". Dimensionless Uncertainty Other