esis.flights.f1.spectrum.Si_IV.radiance

esis.flights.f1.spectrum.Si_IV.radiance = <Quantity 280. erg / (s sr cm2)>

Average quiet-sun radiance measured by Brekke [1993] with the High Resolution Telescope and Spectrograph.

Taken from the literature rather than measured from the raster being scaled, so that the ratio of this to the radiance of the simulated line is a property of the two lines rather than of the observation. Measuring it from the raster would divide the observation by itself, which would give every scene the same brightness however bright the Sun was that day.