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PollyNET / Pollynet_Processing_Chain

NRT lidar data processing program for multiwavelength polarization Raman lidar network (PollyNET)
https://polly.tropos.de/
GNU General Public License v3.0
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effective resolution for lidar ratio #94

Closed HolgerPollyNet closed 3 years ago

HolgerPollyNet commented 3 years ago

Should we provide the lidar ratio (Raman method) with the effective resolution? That would mean to take different smoothing lengths for extinction and backscatter coefficient.

I think this could be implemented as an option in the future.

ZPYin commented 3 years ago

I will take this into account in designing Picasso v3.0. In principle, it should be easy to be implemented. The headache thing is to homonize the effective resolution of backscatter and extinction profiles. But of course, this needs to be addressed in Picasso v3.0.

ZPYin commented 3 years ago

Smoothing window of extinction and backscatter can be harmonized by using additional 2-order Savitzky-Golay filter for backscatter, when effective resolution of backscatter is less than that of extinction. The smooth window length of the filter can be determined by Eq.6 in Ref.1.

This feature has been implemented in Picasso v3.0.

References

  1. Mattis, I., D'Amico, G., Baars, H., Amodeo, A., Madonna, F., and Iarlori, M.: EARLINET Single Calculus Chain–technical–Part 2: Calculation of optical products, Atmospheric Measurement Techniques, 9, 3009-3029, 2016.