Atlas of the Solar Intensity Spectrum and its Center-to-Limb Variation

The atlas of the Third Solar Spectrum (SS3) represents the ratio between the intensity spectrum at different distances from the solar limb and the intensity spectrum at disk center (µ = 1.0), both in units of the intensity of the local continuum level.  The observed positions of the measurements cover 9 different µ values along the solar axis ranging from 0.1 to 0.9 in step of 0.1, where  µ=cosθ is the cosine  of the heliocentric angle θ. The current version of the atlas covers the range 4384- 6610 Å.

In the PDF file, the first plot represents the spectrum at the center of the solar disk, recorded at IRSOL. The next 9 plots represent the 3rd solar spectrum for µ=0.1, µ=0.2, µ=0.3, …, µ=0.9

Columns of the CSV file:

WL:
Wavelength, 4384-6610 Å

IC:
I/Ic at disc center

RMU01:
limb / disk-center ratio at µ=0.1

RMU02:
limb / disk-center ratio at µ=0.2

…
…

RMU09:
limb / disk-center ratio at µ=0.9