The service is related to access to WOS facilities for dedicated experiments tailored to the needs of users, including integration of data provided by different ACTRIS active, passive and in-situ instruments operating at WOS. 

The access includes the possibility to carry out integrated studies with the user instrumentation. Specific measurements campaigns can be planned based on user request. 

WOS facility comprises 3 labs: Remote Sensing Laboratory, Radiation Transfer Laboratory, and Fluid Dynamics Laboratory. The user can get access to all of them, depending on the needs. 

WOS geographic position, in East-Central Europe in a flatland urban environment makes the observatory a perfect location for investigating different aerosol types and atmospheric processes and setting up experiments with the support of the researchers and technicians operating WOS.

SERVICE STATUS: The service is available (operational and ready to be offered). Among others, the following instruments are available at WOS: stationary multi-wavelength near- and far-field Raman lidar with polarization and water vapor capability, mobile multiwavelength Raman lidar with fluorescence capability, stationary photometer, Doppler lidar, microwave radiometer, disdrometer, shadowgraph, gas spectrometers, pollen monitor, different microscopes, aethalometer, ambient nephelometer, nephelometer with humidity chamber, compact cloud chamber, aerodynamic tunnel, integrating half-sphere FTIR, wide range of radiation sensors, set of meteorological sensors, radio-sounding system  

TIME CONSTRAINTS: The remote and physical access of the external users at the WOS facility must be discussed and planned with the PI of WOS and the TNA coordinators. 

External users are allowed to access WOS observatory only under WOS personnel supervision, prior to their registration in the Visitor System.

The user must go via HPS training prior to accessing the WOS facility.