PBM observations
| The readings were taken at zenith after the astronomical twilight has ended. | ||
| Los Christanos is on a Canary island. At
sea-level it suffered haze, although it seemed dark. |
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| Las Canadas is at 2300 meters above sea-level. A
visually very good night. |
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| Bjorkviks brygga is close (35 km) to
Stockholm. A visually good night. |
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The Archipelago is about 50 km out. It was a visually excellent sky. |