If you want to track the darkness of the sky for long nights in a place where you can't keep a laptop, you need a meter that can measure and remember data on its own. The SQM-LU-DL datalogger from Unihedron can do that. You set it up via the computer, after which it measures and stores the brightness of the night sky at fixed intervals.<\/p>\n\n\n\n
Later on, you can read the data off via USB. Handy for measuring lines in a dark place, in a natural area, or on your own roof. This way you can see if a spot is dark enough for weak signals. deep-sky objects<\/a>.<\/p>\n\n\n\n Note down where and how the meter was placed with each set of measurements; this will make it easier to compare the readings later on. If the meter is left outside for an extended period, place it in a weatherproof enclosure.<\/p>\n\n\n\n Without a computer, the meter needs power; for that, there is a battery holder for the SQM-LU-DL<\/a>. If you want to measure with a filter, there is the 1.25 inch filter adapter for this meter<\/a>.<\/p>","protected":false},"excerpt":{"rendered":" Sky Quality Meter that measures itself at fixed times and stores the values, for long measurement series without a laptop next to 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