![]() DP sets the switches that are appropriate for a given data type to PERFORM for steps to be carried out by calcos, and then calcos changes them to COMPLETE or SKIPPED in the calibrated files. ![]() Target acquisition exposures are not calibrated by calcos, except for ACQ/ IMAGE, although the raw data from these acquisitions are available through the data archive.Īs with HST calibration pipelines for other instruments, the choice of which operations are performed during calibration is controlled by calibration switches, which are stored in the primary FITS header. extract and produce the final (one-dimensional) flux-calibrated (summed) spectrum for the entire observation.īoth COS FUV and NUV TIME-TAG event lists and ACCUM images are fully calibrated by calcos.generate an exposure-specific wavelength-calibrated scale, and.correct the data for instrument effects (e.g., noise, thermal drifts, geometric distortions, pixel-to-pixel variations in sensitivity),.This structure incorporates modules that: The calcos pipeline is comprised of three main components that provide calibration of the COS data.
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