Extent cloud creation functionality

Summary

Currently we analyse FRAM data, and in case the AOD for a given pointing is larger than the clear night AOD + minimal cloud thickness we produce a cloud. The produced cloud is a "binary" cloud, meaning a rectangular object with a uniform optical depth. Its thickness depends on the season as identified by the molecular atmosphere calibration. Also the cloud is considered white, i.e. its optical depth is independent of the wavelength. While such an approach might be sufficient it is quite simplistic.

What is the expected correct behavior?

Therefore here is a list of suggested improvements.

• add a functionality that will modify the optical depth as a function of the wavelength according to the Angstrom's law. The required parameter of the function would be the Angstrom coefficient and wavelength of the measured AOD.
• add more realistic cloud shapes for La Palma, in particular clouds that their optical depth follows a double Lorentzian distribution.
• that might be for the future: implement a more elaborate cloud creation decision maker than the simple cut mentioned above.
• include pointing information in the created cloud. That means that 2 more dimensions will be added in the extinction hypercube. The decision of whether we implement this should be taken together with SimPipe and the science team.