** Next:** 11.2 High-Dispersion Absolute Flux
** Up:** 11.1 Low-Dispersion Absolute Flux
** Previous:** 11.1.5 Temperature-Dependent Degradation Correction

It is important to note that, as implemented in the image processing
software, the interpolated inverse sensitivity values, time- and
temperature-dependent sensitivity corrections, effective exposure time
normalization, and any overall gain correction factor (for non-standard
exposure or read gain or LWR UVC voltage settings) are computed as
independent correction factors and then all applied simultaneously to
the net flux and sigma spectra to result in fully calibrated and
corrected spectra in absolute flux units. The net flux spectrum (in FN
units), as determined by *SWET*, that is retained in the
low-dispersion extracted spectrum does not have any of these correction
factors applied to it. The calibrations and corrections are applied as
follows:

where is the inverse sensitivity (including any
necessary S/L or T/L response corrections), *gain* is the cumulative UVC
voltage and gain correction factor (if necessary), *R*_{t} and
*R*_{T} are the time- and temperature-dependent sensitivity
correction factors, respectively, and *t*_{eff} is the effective
exposure time. The values for and *R*_{t} are
evaluated at the wavelength of each pixel through quadratic and nearest
neighbor interpolation, respectively, of their tabulated values. The
resulting absolutely calibrated units are ergs/cm^{2}/Å/sec.

** Next:** 11.2 High-Dispersion Absolute Flux
** Up:** 11.1 Low-Dispersion Absolute Flux
** Previous:** 11.1.5 Temperature-Dependent Degradation Correction
*Karen Levay*

*12/4/1997*