SITES Spectral is an infrastructure for collecting spectral data for ecosystem measurements. By fixed and mobile multispectral sensors and cameras seasonal and inter-annual variations in vegetation conditions are captured over small and intermediate areas. The SITES Spectral instrument setup consists of multispectral sensors, phenology cameras and UAV:s. The collected data is relevant to the studies of a number of processes in the ecosystems; for example, productivity, efficiency of use of light and moisture conditions. Through this initiative SITES can provide data for research related to e.g. climate change, carbon and greenhouse gas balances, phenology, general ecology and biodiversity and plant science.