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PUNCH Level 3 WFI-2 Polarized F-Corona Model

(2026). PUNCH Level 3 WFI-2 Polarized F-Corona Model. [Data set]. Solar Data Analysis Center.

ResourceID
spase://NASA/NumericalData/PUNCH/WFI/2/Level3/PF2/P4D

Description
PUNCH Level 3 polarized F-corona model derived from Wide Field Imager 2 (WFI-2) observations and represented in the PUNCH mosaic frame as an MZP (Minus, Zero, and Plus) polarization triplet, 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).

Metadata Rights
: Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.

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Details

Version:2.7.2

NumericalData

ResourceID
spase://NASA/NumericalData/PUNCH/WFI/2/Level3/PF2/P4D
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
PUNCH Level 3 WFI-2 Polarized F-Corona Model
ReleaseDate
2026-08-17 00:08:46Z
Description
PUNCH Level 3 polarized F-corona model derived from Wide Field Imager 2 (WFI-2) observations and represented in the PUNCH mosaic frame as an MZP (Minus, Zero, and Plus) polarization triplet, 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).
PublicationInfo
Authors
Southwest Research Institute
PublicationDate
2026-03-31 00:00:00Z
PublishedBy
Solar Data Analysis Center
Contacts
Role Person StartDate StopDate Note
1. PrincipalInvestigator spase://SMWG/Person/Craig.E.DeForest
2. TeamLeader spase://SMWG/Person/J.Marcus.Hughes
3. TeamMember spase://SMWG/Person/Chris.Lowder
4. TeamMember spase://SMWG/Person/Derek.A.Lamb
5. TeamMember spase://SMWG/Person/Samuel.J.VanKooten
6. TeamMember spase://SMWG/Person/Ritesh.Patel
7. TeamMember spase://SMWG/Person/Daniel.B.Seaton

InformationURL
Name
The PUNCH Website
URL
https://punch.space.swri.edu/
Association
AssociationID
spase://NASA/Collection/PUNCH/NFI_WFI/Level3/PT4M
AssociationType
PartOf
AccessInformation
RepositoryID
spase://SMWG/Repository/SDAC
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC-BY-4.0
RightsURI
https://spdx.org/licenses/CC-BY-4.0.html
RightsName
Creative Commons Attribution 4.0 International
Note
CC BY 4.0 is the license specified in the PUNCH PF2 FITS files
AccessURL
Name
PUNCH Level-3 WFI-2 Polarized F-Corona Model (PF2)
URL
https://umbra.nascom.nasa.gov/punch/3/PF2/
Format
FITS
Encoding
None
InstrumentIDs
spase://NASA/Instrument/PUNCH/WFI/2
MeasurementType
ImageIntensity
TemporalDescription
TimeSpan
StartDate
2025-07-24 00:00:00Z
RelativeStopDate
-P10D
Cadence
P4D
ObservedRegion
Sun
ObservedRegion
Sun.Corona
InputResourceID
spase://NASA/NumericalData/PUNCH/WFI/2/Level1/PM2/PT4M
InputResourceID
spase://NASA/NumericalData/PUNCH/WFI/2/Level1/PZ2/PT4M
InputResourceID
spase://NASA/NumericalData/PUNCH/WFI/2/Level1/PP2/PT4M
Parameter #1
Name
FITS Extension #1 Data Array
Description
PUNCH Level 3 polarized F-corona model derived from WFI-2 observations and represented in the PUNCH mosaic coordinate frame. The data are stored as a compressed 4096 by 4096 by 3 floating-point image cube containing the MZP polarization triplet: Minus (−60°), Zero (0°), and Plus (+60°). 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.
Units
2.009e+07 W m^-2 sr^-1
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity
WavelengthRange
Low
530
High
530
Units
nm
Parameter #2
Name
FITS Extension #2 Uncertainty Array
Description
Reciprocal fractional uncertainty associated pixel by pixel with the WFI-2 polarized 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 3, corresponding to the Minus, Zero, and Plus polarization layers.
Units
Dimensionless
Support
Qualifier
Uncertainty
SupportQuantity
DataQuality
NASA Insignia
Contact SPDF: NASA-SPDF Feedback/Support
Responsible NASA Official: Lan Jian
Site Editor: Rita Johnson
SPDF ROR ID
SPDF re3data ID
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Last Updated: 2026-08-17