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A lightning strike on a Lightmeter. While Lightmeters routinely record lightning at day and night, this one came too close. The Kanzelhöhe-Lightmeter-Station, at_KSO_1 is the number L19 of the original International Year of Astronomy 2009 prototype-series. It recorded from August 2009 to June 2017, over eight years and outlived a couple of control-computers. The PCDuino used recently was also destroyed by the lightning near June 22th 2017



The Lightmeter is a low cost instrument for global continuous monitoring of artificial night sky brightening (light pollution). The first version was developed for the International Year of Astronomy 2009.

Light pollution is the introduction by humans, directly or indirectly, of artificial light into the environment. *

The Starlight and Lightmeter Wiki

Lightmeter at the Legensteinhütte (on top of the mast on the right) in the Dürrenstein Wildernis Area during a maintainance visit 2017-02-11
Digilum, Sky Quality Meters and Lightmeters united at Montsec during the intercomparison campaign in May 2016
The total lunar eclipse of September 28th 2015 as seen by the Tautenburg lightmeters. Horizontal illuminance is shown to drop to the mLux levels of a moonless sky.
Lightmeter detection of the Aurora in northern Germany seen by many observers on 2015-03-18. A proxy for the horizontal illuminance is show as function of time [UTC]. The red and blue curves are for the two lightmeters with a raw calibration. The entire night is shown in the range below 3 mlx. The Auroral signal is visible as a triangular bump near 23:00 UTC. Graph: G. Wuchterl
The March 2015 fireball recorded by the Tautenburg Lightmeters, 2015-03-15, G. Wuchterl.
Nighttime total radiation at the Kepler observatory in Linz (Austria) measured under the exceptionally cloudy conditions from January to July 2013 - most overcast nights since the beginning of the records.
Comparison of the clear moonless sky medians of total radiation (divide numbers by 10 for a proxy of horizontal illuminance) measured in 2012 and 2013 by the stations of the Vienna Lightmeter Network.
Light-levels measured at the Setagaya/Tokyo Lightmeter station. Distribution of the night-time total radiation in 2012 at Setagaya Read the article Long-term Measurement of the Night Sky Brightness in Japan Using Lightmeters: 2009-2012 Data: [http://id.nii.ac.jp/1060/00006365/

For help contact Verein@Kuffner-Sternwarte.at .

July 8th: UNESCO World Heritage Committee inscribes Dürrenstein Wilderness on the world heritage list as part of the Primeval Beech Forests of the Carpathians and Other Regions of Europe, Dürrenstein Wildernis

30th June Kanzelhöhe Lightmeter and Arduino-Logger destroyed by lightning.

28th May:: Dürrenstein Light Monitoring 2010 - 2017 - first results appeared in Silva Fera 6, pp.77

27. April:: Urteil des OÖ LVWG zu Effektbeleuchtung in Natura-2000 Gebiet: File:551086 OÖ Umweltanwalt Urteil des LVWG zu Effektbeleuchtung in Natura-2000-Gebiet.pdf; Info von OÖ Umweltanwalt Martin Donat am 2017-04-27; --GW (talk) 16:01, 3 May 2017 (CEST)

March: Earth at Night - Black Marble 2016 (NASA)

Mar. 13th: Media-report on Clara Leutgeb and „Does light pollution affect wild birds? An experiment on blue tits (Cyanistes caeruleus) in the Viennese Forest“ with a new Video on Vienna's lights and the Helicopter study of uplight

Feb. 16th: Presentation of the full light-ballance of the city of Vienna at a media conference at the Vienna Natural History Museum Pressemappe. The full ballance was made possible after the completion of the Helicopter aerial survey of the city lights in all directions. Media response examples: Zuviel Licht über Wien (Wiener Zeitung), Nächtliches Lichtverbot für Geschäfte gefordert

Feb. 8th: Report from the 2016 Montsec Intercomparison campaign of methods to measure the night-light and artificial night-brightening: Montesec Intercomparison Report (at LoNNe)

Nov. 8th: Presentation of the first results of the Vienna flight campaign to measure city light emission in all directions. This completes the Vienna light balance: outdoor lighting sources, use, immission resulting in skyglow and lightdomes: Erste Ergebnisse der Licht-Befliegung Wien - Präsentation beim ExpertInnen Gespräch der MA 33

June 21st: American Medical Association's warning on LED: cool it and dim it (CNN)

June, 18th: 2D 3D high-res Viewer of the New World Atlas of Artificial Sky Brighness

June, 13th: The New World Atlas of Artificial Sky Brighness (Falci et al. 2016) is there! - KML-Layer

27th April: All Lightmeter-Driver-Software now available on this wiki at the Lightmeter-Driver page. Most of the most important other pages - including the ones calibration and installation instructions - are now restored. If you hit a page that is still missing you find the backup at The old (damaged and readonly) Lightmeter Wiki

26th April: The Lightmeter Mark 2.3l and Lightmeter Mark 2.4 pro are sold out. Mail Verein@Kuffner-Sternwarte.at to place pre-orders for the Mark 3 Lightmeter that is under development.

22nd April: Lightmeter "First Flight" successfully completed.

24. Nov.: Upper Austria's Light Monitoring Network has now completed its first year at two stations. More information on the nicely documented network of currently 23 SQM-stations with online-data access: Light Measurement Network of Upper Austria. This is arguably the world's largest light monitoring network and most likely the only one run by a government. --GW (talk) 12:06, 24 November 2015 (CET)

The light-pages of upper Austria, Light at Night in Upper Austria also contain an aerial survey of the lights of the Linz-Wels metro-area online and with SQM-data superimposed: "Doris" online viewer of Linz at Night

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