|The idea of the NOVAC project is to establish a global network for measurement of volcanic gas emissions, based on the Scanning Dual-Beam mini-DOAS instrument developed in the EU project DORSIVA. Primarily the instruments will be used to provide new parameters in the toolbox of the observatories, for risk assessment, gas emission estimates and geophysical research on the local scale. In addition to this, data are exploited by the project partners for other scientific purposes then local volcanic gas emissions; large scale volcanic correlations, satellite validation, studies of climate change and studies of stratospheric ozone depletion. The Scanning Dual-Beam mini-DOAS instrument represents a major breakthrough in volcanic gas monitoring. The instrument is capable of real-time automatic unattended measurement of the total emissions of SO2 and BrO from a volcano with better then 5 minutes time resolution, over the daylight day. Besides providing an accurate determination of the total emissions of SO2 and BrO from the volcano, the high time-resolution of the data enables correlations with other geophysical data, e.g. seismic data. Thus significantly extending the information available for real-time risk assessment and research at the volcano. By comparing gas emission data, with emissions from neighbouring volcanoes on different geographical scales, or with other geophysical phenomena (earthquakes, tidal waves...) mechanisms of volcanic forcing may be revealed. The spectra recorded by the instrument will also be used to derive data from complement global observation systems related to climate change and stratospheric ozone research. Taking advantage of the fact that many volcanoes are located in remote areas sparsely covered by existing networks. The consortium comprises 15 volcanoes from 4 continents, including some of the most active and strongest degassing volcanoes in the world.