Update on the spectroradiometer

Lasse Ylianttila has now developed an stray light correction algorithm for our Ocean Optics Maya 2000 Pro, and done the necessary calibrations and slit function measurements with different lasers. Developing an stray light correction for the Maya was more complex as, unexpectedly, this top-of-the-range model behaved worse with respect to stray light than the cheaper and older Ocean Optics S2000. We are still waiting for the Bentham cosine diffuser to be delivered, but meanwhile Lasse has lent us an Ocean Optics diffusser. The spectral irradiance calibration will need to be repeated when we get our own diffuser.