This folder contains the data related to the article entitled:

"Comparison of Three High Resolution Real-Time Spectrometers for Microwave Ozone Profiling Instruments"

It was published by IEEE in 2021 in the Volume 14 of the IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (Special Issue for the 16th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad 2020))

Authors:
Eric Sauvageat (corresponding authors, mail: eric.sauvageat@unibe.ch / e.sauvageat@gmail.com)
Roland Albers
Mikko Kotiranta
Klemens Hocke
R. Michael Gomez
Gerald E. Nedoluha
Axel Murk

The analysis code is available on request and will be published soon as part of a bigger project as it is a generic code used for multiple MW radiometer at IAP. For more information, please do not hesitate to contact the corresponding authors. Also if someone reads this file once, I would be both surprise and happy to know who it was so please send me an email ;)

This folder contains 2 sub-folders which contains the following:

- Level1:
It contains the integrated data (level 1b) from the MOPI 5 instrument for the 3 time periods of analysis and for the 3 spectrometers. There is one netCDF file per data period and per spectrometer with names as "mopi5_level1b_meanTb_harmo_*spectrometer_name*_*time_periods*.nc".

The files contain a number of variables which are recorded on the following dimensions:
1. chunks: the differents brightness temperature bins on which the calibrated spectra where integrated. The value of the chunks coordinates are approximated value for the mean brightness temperature which was used to separate and integrate the calibrated spectra.
2. channel_idx (the channel index of each spectrometer)
3. bin_freq (a frequency binning vector)
4. bin_freq_interp (a frequency binning vector interpolated to the binned frequencies of the reference spectrometer U5303)

For more information on how to use and read these files, please contact the corresponding authors.

- Level2:
It contains the retrieved ozone profiles (level 2) for each spectrometer for the time period of interest (namerly February 2019) as well as all diagnostics quantities extracted with the OEM method. There is one netCDF file per spectrometer with names as "mopi5_level2_*spectrometer_name*_2019_02_22fascod_paper.nc". In addition to the 3 spectrometers, an additional file is present for the AC240 named "mopi5_level2_AC240_2019_02_22fascodunbiased_all.nc" which corresponds to the retrieved ozone profile obtained from the corrected AC240 spectra. 

Note that each file has a "time" dimension as coordinates but that it corresponds indeed to the "chunks" dimension from the level 1b. This is because each retrieved profile corresponds to an integrated spectra from a single brightness temperature bin (see paper for details).

Please do not hesitate to contact me for further information about these data or to request the analysis code.

Cheers,
Eric
