Digital Images of the Solar Disc and Limb 1903 -1942: The asset created are a set of high resolution digital images of the solar disc in Ca II K light and H-alpha light which were taken daily at the Cambridge Solar Observatory between 1903 and 1942. The images are currently available on glass plates held by the UK Solar System Data Centre in its archive at the Rutherford Appleton Laboratory. This secures and improves accessibility to a valuable environmental data resource.

NERC Reference: NE/L013002/1