Urban Observatory of Belgrade (UrbObsBel) – Light Pollution

The Urban Observatory of Belgrade (UrbObsBel) project, established under the auspices of the Science Fund of the Republic of Serbia, aims to address the pressing issue of light pollution and its multifaceted impacts on urban environments, ecosystems, and human health. Located at the Astronomical Observatory in Belgrade, UrbObsBel leverages a suite of advanced instruments, including FLIR A700 thermal cameras, AllSky Cameras, Sky Quality Meters (SQM), TESS-W photometers, and custom-built visible and nearinfrared (VNIR) hyperspectral imaging sensors, to monitor and analyze light pollution in Belgrade and its surroundings. These instruments, combined with satellite data from sources such as SENTINEL, GOES, and AQUA, enable comprehensive remote sensing across a wide spectral range, from visible to near-infrared wavelengths. The project focuses on understanding the effects of artificial light at night (ALAN) on urban dynamics, energy consumption, and environmental sustainability. By integrating ground-based observations with cutting-edge data analysis techniques, including machine learning and principal component analysis, UrbObsBel aims to provide actionable insights for urban planning and policy-making. A dedicated Data Repository (DR) will be established to store and publicly share observational data, ensuring transparency and fostering collaboration within the scientific community. Preliminary results from TESS-W measurements highlight significant differences in sky brightness between urban Belgrade and the rural Astronomical Station Vidojevica, underscoring the pervasive impact of light pollution. Through its innovative research and public engagement initiatives, UrbObsBel seeks to raise awareness about the importance of preserving dark skies and promoting sustainable lighting practices. By balancing urban development with environmental stewardship, the project aspires to enhance the quality of life for Belgrade's citizens while contributing to global efforts to mitigate light pollution.