Accurate measurements are essential for understanding light pollution. According to estimations light pollution increases from 3 % to 8 % per year depending on location. The only way of having control over light pollution is regular monitoring based on calibrated (if possible) automatic measuring equipment. Short term variations of sky brightness can have peak to peak variations of more than 40 % within a few weeks due to varying humidity, aerosols, solar activity, temperature, thin low and high altitude clouds invisible by naked eyes. Inter-comparison will be done in the year of Solar maximum, thus we expect about 0.2 – 0.5 magnitude brighter sky than it could be at Solar minimum. For reference, two photomet ric telescopes will be used with CCD cameras and Johnson’s BVR filters.

Read more: Lastovo 2013 [PDF]