DKIST is pleased to announce the release of newly reprocessed ViSP datasets incorporating several improvements to the data-processing pipeline. These updates address issues affecting the handling of characteristic spectra, interpolation artifacts during beam registration, and the cropping of beam-combined Level-1 arrays.
The reprocessing introduces an improved gain-calibration algorithm that reduces polarization artifacts, a revised interpolation method that yields smoother beam alignment, and array-cropping corrections to ensure consistent spatial and spectral dimensions. In addition, ViSP Level-1 data now include an improved absolute wavelength calibration using the DKIST instrument wavelength calibration library.
Together, these changes improve polarimetric accuracy, spectral calibration, and the overall quality of ViSP data products. The reprocessed datasets also include a new set of “dataset extras”. The primary purpose of dataset extras is to provide a common context between the user and the DKIST Data Center when discussing issues seen in the L1 data. However, for experienced users, they provide a detailed look at the intermediate calibration products used to create Level 1 data.
Further details about these updates and the dataset extras are available in the ViSP Data Reprocessing – March 2026 page.
Please contact Alisdair Davey if you have any questions or comments.
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Alisdair Davey
DKIST Data Center Scientist