This document provides an overview of the steps used to calibrate data from the VBI instrument to Level 1 FITS files. See https://nso.edu/telescopes/dkist/instruments/vbi/ for an overview of the VBI instrument. The VBI calibrations steps are summarized in Figure 1 and are described in detail in the table below. Currently the speckle reconstruction is occurring in Boulder rather than at the telescope. Once speckle reconstructed, data will be re-ingested into the data center for conversion to Level 1 science data. For any data that cannot be speckle reconstructed, the basic calibration flow below will be followed. For any speckle reconstructed data, Level 0 (raw) data will never be available.
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