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/PTM/PT4M NASA NumericalData PUNCH Level 3 Polarized K-Corona Mosaic Data 2026-08-25T00:08:46Z PUNCH Level 3 polarized K-corona science mosaic (trefoil), after background removal and polarization resolution into total brightness (B), polarized brightness (pB), and conjugate polarized brightness (pB') image layers. 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, 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 2026-04-04T00:00:00Z 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_PTM_PT4M 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/PTM/ 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 2025-07-29T00:02:30Z -P3M PT4M Sun Sun.Corona FITS Extension #1 Brightness Data Array PUNCH Level 3 polarized K-corona mosaic stored as a compressed three-dimensional floating-point image cube with three image layers: total brightness (B), polarized brightness (pB), and the conjugate polarized brightness component (pB'). The data array dimensions are 4096 x 4096 x 3. The FITS header provides helioprojective longitude and latitude coordinates with an ARC projection and an alternate ICRS right ascension and declination coordinate system with a STOKES third axis. The pixel scale is 0.0225 degrees, or 81 arcsec, at the reference point. The nominal wavelength is 530 nm. The reference time is specified by the DATE-OBS FITS keyword. 2.009e+07 W m^-2 sr^-1 Electromagnetic Intensity 530 530 nm