Please read the full document for details
Scope of the campaign:
This campaign is organized as part of the ACTRIS initiative for studying the changes in the atmosphere during the COVID-19 lockdown. Two types of data will be issued:
All lidar stations that are able to operate during the lockdown are invited to participate in the campaign. In order to register to the campaign, please send a message to Doina Nicolae and Lucia Mona by 30 April 2020.
The stations should follow the general rules described in the linked document.
Lidar stations should perform measurements each day, as often as possible. At minimum, the following time intervals must be covered:
The instrument should be checked for alignment, stability and noise before the experiment. The settings should remain unchanged during the campaign, to allow the use of the same SCC configurations.
If possible, a full set of QA tests (telecover, Rayleigh-fit + dark-measurement, polarization calibration) should be performed during the preparation period (26-30 April). The QA tests will be used by CARS to check the status of the instrument (full overlap, dynamic range, polarisation calibration factor).
For the purpose of this experiment, the use of the SCC is mandatory. Only data processed by the SCC will be used in this study.
Lidar data should be pushed to the SCC in max. 12 h after the end of each measurement. Datasets should be submitted in packages of 2h profiles.
Each station should use max. 2 configurations (daytime and nighttime) to not be changed during the campaign. For lidars with polarization capabilities also a depolarization configuration should be used.
Data products’ availability:
Lidar quicklooks will be available at: https://quicklooks.earlinet.org/. Aerosol optical products will be made available in NRT through the THREDDS server: