Abstract
We present a detailed review of the calibration of the LASCO C3 coronagraph on the SOHO satellite. Most of the calibration has been in place since early in the mission and has been utilized to varying degrees as required by specific analysis efforts. However, using observational data from the nearly decade-long database of LASCO images, we have re-evaluated and improved many aspects of the calibration. This includes the photometric calibration, vignetting function, geometric distortion, stray light, and exposure and observation times. Using this comprehensive set of corrections we have generated and made available a set of calibrated coronal images along with a set of periodic background images to ease the accessibility and use of the LASCO database.
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Morrill, J.S., Korendyke, C.M., Brueckner, G.E. et al. Calibration of the Soho/Lasco C3 White Light Coronagraph. Sol Phys 233, 331–372 (2006). https://doi.org/10.1007/s11207-006-2058-1
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DOI: https://doi.org/10.1007/s11207-006-2058-1