Piberbach

2014-08-13T11:46:56Z

HerbertRaab:

Piberbach

2014-08-13T11:40:43Z

HerbertRaab:

Main Page

2014-08-12T18:51:28Z

HerbertRaab: AT_LinzUmB operational

[[File:Format SkysensorKepler-Sternwarte at LINZ 1 - Jän. - Jul. 2013 dist night.png|thumb|400px||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.]]
[[File:Light Moonless Night Medians Vienna Lightmeter Network Comparisons 2012-2013.jpg|thumb|400px|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.]]
[[File:JP Setagaya 1 Jun-Dec 2012 distribution.png|thumb|right|400px|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/]]

__NOTOC__

= The Starlight and Lightmeter Wiki''' =

'''Important:''' We are recovering after an attack and things will take time for full functionality.  

The status of May 2014 is saved at: '''[http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Lightmeter The original Lightmeter Wiki]'''

If you need help please contact Verein@Kuffner-Sternwarte.at .

= [[Aktuell|News]] =

'''August 10''': AT_LinzUmB at [[Piberbach]] is operational.

'''French Light Pollution Maps for different conditions''' [http://www.avex-asso.org/dossiers/wordpress/?page_id=38#les-nouvelles-carte-de-pollution-lumineuse-2011 http://www.avex-asso.org/dossiers/wordpress/?page_id=38#les-nouvelles-carte-de-pollution-lumineuse-2011]

'''June 30th''': Kepler-Obervatory: [[Kepler-Sternwarte Linz]] - computer change after 4.6 years of taking data - the original lightmeter is still running.

'''June 28th''': We are slowly re-opening: edits are now possible with a confirmed Email-account: mail to verein@kuffner-sternwarte.at with your username-wish and we will send you the access. --[[User:Admin|GW]] ([[User talk:Admin|talk]]) 11:29, 28 June 2014 (CEST)

'''June 17th''': Import-Test [[Großmugl]]

'''May 29th: '''We are slowly recovering after an attack that vandalized the Lightmeter wiki. The attack happened during an upgrade to the new Mediawiki version.

'''May 3rd:''' Mediawiki update to Version 1.22.2 completed on May 3rd; GW -- 22:08, 3. Mai 2014 (CEST)

'''Apr. 14th, 2014:''' Vienna's lightdome shows 10% increase 2013, the 3rd year of network-monitoring [http://wua-wien.at/home/publikationen/3%7C Licht über Wien III (Vienna Environmental Protection Agency)], [http://www.wua-wien.at/home/administrator/components/com_astatspro/getfile.php?id=153 (pdf, 3MB)]

= Mediawiki Installationsmeldungen =

...now new for Mediawiki 1.22.2. [http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Lightmeter Click here for the original version]

'''MediaWiki wurde erfolgreich installiert.'''

Hilfe zur Benutzung und Konfiguration der Wiki-Software findest du im [http://meta.wikimedia.org/wiki/Help:Contents%7CBenutzerhandbuch%7C%7C [1]].

== Starthilfen ==

*[http://www.mediawiki.org/wiki/Manual:Configuration_settings%7CListe%7Cder%7CKonfigurationsvariablen [1]]
*[http://www.mediawiki.org/wiki/Manual:FAQ%7CMediaWiki-FAQ%7C%7C [2]]
*[https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce Mailingliste neuer MediaWiki-Versionen]
*[http://www.mediawiki.org/wiki/Localisation#Translation_resources%7CLokalisiere%7CMediaWiki%7Cfür deine Sprache]

2014-08-08T17:28:02Z

HerbertRaab:

[[File:Luxmeter Kepler-Sternwarte 1.jpg|thumb|right]] [[File:Luxmeter Kepler-Sternwarte 2.jpg|thumb|right]]

Link to the old station-page: [http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Kepler-Sternwarte_Linz http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Kepler-Sternwarte_Linz] --[[User:Admin|GW]] ([[User talk:Admin|talk]]) 10:52, 30 June 2014 (CEST)

=== General Description ===

The Lightmeter (Mark 2.2, S/N L3) at the Kepler-Observatory in Linz, Austria (48° 17' 36.3" North, 14° 16' 06.0" East [http://maps.google.de/maps?ll=48.2934180,14.268333&spn=0.01,0.01&t=k&q=48.2934180,14.268333 [1]], 344m ASL, Station Code AT_LINZ_#) is mounted on top of a 3,5m pole on the balcony of the observatory building, to avoid shading by the dome as much as possible. To connect the Lightmeter with the PC, a ~7m extension of the USB cable is necessary. As no permanent Internet connection is available in the observatory, the data is uploaded manually to the GAVO data center. Also, the clock is set manually from time to time.

The distance to the city center of Linz is ~1.9 km, to the city center of Leonding ~2.1 km, and to the industrial plants ~5 km (~4.5 km to the Chemiepark, ~5.5 km to the VOEST steel plant).

After some initial problems (see below), the lightmeter started continuous sky monitoring on 2009-04-21.

On 2014-06-29 the Windows PC running Jörg Weingrill's [http://hms.sternhell.at/lightwiki/Lightmeter-Driver%23Skysensor%20Software Skysensor-Software] has been replaced by a Laptop running the Lightmeter Software under Unbuntu (see below). The Station code has been changed from AT_LINZ_1 to AT_LINZ_2 on that occasion.

=== Preliminary Calibration ===

Accoring to Günther Wuchterl, the preliminary calibration for the Lightmeter #3 is:

*For < 1 lux: Lux = 3E-7 * counts (calibrated with a hand-held luxmeter)
*For > 1 lux to at least 20'000 lux: Lux = 2E-6 * (counts+exp(counts/8.7E4))

The latter is precise to ±10% on Lightmeter #2.

=== Final Calibration ===

Results of final calibration (described in detail here: [[Calibration example Linz]]):
<pre> X = c ( b (a exp (n(1+dT)/a) - 1) + n )

n ... counts (sensor output)

X ... physical quantity (total radiation in [W/m²] or horizontal illumination [Lux])

a = 1.2835e+05, b = 1.6468e-02, c = 2.5778e-09, d = 3.4726e-03 W/m²

a = 1.2835e+05, b = 1.6468e-02, c = 3.1887e-07, d = 3.4726e-03 Lux

Background X0 = 6.741 mlx
</pre>
=== Problems ===

There were two problems with Lightmeter in Linz. First, switching the fluorescent lamps on or off inside the observatory building crashes the Luxmeter driver. Second, due to the cable extension needed, the USB connection was unstable. A workaround for the first problem can be achived by setting up the software so that PC reboots every time the driver crashes. The solution for the second problem was found in using a USB-Extender USB-RJ45, which uses a 10m network cable to extend the original Lightmeter cable to the PC, and to use Jörg Weingrill's [[Lightmeter-Driver#Skysensor Software|Skysensor-Software]], which reboots the PC in case of USB errors.

For a more detailed description of the problems (in German language), see [[Lightmeter-Driver#USB-Fehler am Linzer Luxmeter]].

Sometimes, there is apparently a problem with the USB connection, no data is recorded, the Skysensor-Software does display "Error" in the status line, but still does not reboot the PC. On several occasions, this has gone unnoticed for several days, leading to long gaps in the measurements. To avoid this, we have installed a scheduled task which reboots the PC every day at 6:00, 12:00, 18:00 and 23:55 local time.

=== Replacement of the Computer ===

Due to increasing downtime of the Lightmeter, the PC runnig Jörg Weingrill's Skysensor-Software under Windows XP has been replaced on 2014-06-29 by a Laptop running the Lightmeter Software under Unbuntu. The laptop was set up by Felix Linhardt. The Station code has been changed from AT_LINZ_1 to AT_LINZ_2 on that occasion.

The original sensor (Mark 2.2) is still in use. Also, data upload and clock check is still done manually at more or less regular intervals, usually once in a month.

--[[User:HerbertRaab|HerbertRaab]] ([[User talk:HerbertRaab|talk]]) 08:52, 1 July 2014 (CEST)

=== Light metering network of the state government ===

[[File:AT LINZ and L003.jpg|thumb|right|AT LINZ and L003.jpg|Lightmeter AT_LINZ (top) and L003 (below)]] Since July 21, 2014, the Station L003 of the light metering network of the state government of Upper Austria is also located at the Kepler Observatory. This station runs independent from the Lightmeter.

--[[User:HerbertRaab|HerbertRaab]] ([[User talk:HerbertRaab|talk]]) 20:17, 3 August 2014 (CEST)

=== Data on public lighting in Linz ===

According to [http://www.linz.at/images/LL_196_12_13_MehrLicht.pdf this article] from Ausgust 2010, 20'624 luminaries with a total of 23'206 lamps are used for public lighting in Linz (189'311 inhabitants, as of Jaunuary 2010). The total power comsumption for the public lighting is 2.01 Megawatts. Not included in these figures is, of course, the public lighting of neighbouring municipalities. (Note that the Kepler observatory is located close to the western city limit of Linz, towards the city of Leonding [24.976 inhabitants]).

--[[Benutzer:HerbertRaab|HerbertRaab]] 09:01, 3. Sep. 2010 (UTC)

=== Results ===

*[http://dc.zah.uni-heidelberg.de/lightmeter/q/weather/form?__nevow_form__=genForm&date__day=1&date__month=1&date__year=2010&time=00%3A00%3A00&within=720&stationId=AT_LINZ_1&_DBOPTIONS_ORDER=&_DBOPTIONS_LIMIT=100&_FORMAT=HTML&submit=Go Query data at the GAVO data center] (Change parameters as necessary. Don't foget to select 'AT_LINZ_1' or 'AT_LINZ_2' for the Staion ID.)
*[http://dc.zah.uni-heidelberg.de/lightmeter/q/data/static/AT_LINZ_1/ Directory listing] (AT_LINZ_1, from 2009-04-21 to 2014-06-29)
*[http://dc.zah.uni-heidelberg.de/lightmeter/q/data/static/AT_LINZ_2/ Directory listing] (AT_LINZ_2, from 2014-06-29)

<gallery>
File:Linz-Observatory-Night.jpg|Kepler-Observatory and Lightmeter at night
File:Linz-AllSky_reloaded.jpg|All-sky image
File:L3 Linz April2009 mikt Mondproxy Linz.png|First measurements, April 2009
File:L3 Linz 23April2009.png‎|April 23, 2009
File:L3 Linz 23April2009 Detail Linzer Stufen.png‎|April 23, 2009 (zoomed)
File:L3 Linz Mai 2009.png|Night-Sky brightness in May 2009
File:Juni2009 Linz Wien Berlin Tautenburg.png|Sky brightness at various locations (June 2009)
File:L3 cal 24Augallday Lux mit T 2009 mooncheck.png|Example of fully calibrated data, Sept. 2009
File:L3 Linz Helligkeit Oktober.png|October 2009
</gallery>

[[Category:Pages with broken file links|Pages_with_broken_file_links]]

File:AT LINZ and L003.jpg

2014-08-08T17:22:58Z

HerbertRaab:

Piberbach

2014-08-08T17:05:16Z

HerbertRaab:

=== General Description ===

Station Code AT_LINZ_UMB, Sensor Mark 2.3L, V06.10, S/N 918076.000

[[File:AT LinzUmB Piberbach Sensor.jpg|thumb|right|AT LinzUmB Piberbach Sensor.jpg]] Located in Piberbach, Upper Austria, Austria (48° 06' 55.0" North, 14° 13' 41.1" East [http://maps.google.de/maps?ll=48.115291,14.228089&spn=0.01,0.01&t=k&q=48.115291,14.228089 [1]], ~340m ASL). The Lightmeter sensor is mounted on the stands of some solar collectors on the roof of a house. Using a USB extender and ~20 meters of network cable, the sensor is conneted to a Lightrouter (set up by Felix Linhardt) in the basement of the house. As no internet was available in the basement, the Lightrouter is connected to the network using Powerline adapters from TP-Link [http://www.tp-link.com/en/products/details/?categoryid=1658&model=TL-PA4010PKIT [1]].

The distance to the city center of Linz is ~22 km, to the industrial plants in Linz ~19 km, to the city center of Wels ~16 km, and to the city center of Steyr also ~16 km. The Nettingsdorf paper mill is located 7.7 km to the North.

--[[User:HerbertRaab|HerbertRaab]] ([[User talk:HerbertRaab|talk]]) 00:09, 5 August 2014 (CEST)

2014-07-01T06:53:09Z

HerbertRaab:

[[File:Luxmeter Kepler-Sternwarte 1.jpg|thumb|right]] [[File:Luxmeter Kepler-Sternwarte 2.jpg|thumb|right]] The Lightmeter (Mark 2.2) at the Kepler-Observatory in Linz, Austria (48° 17' 36.3" North, 14° 16' 06.0" East [http://maps.google.de/maps?ll=48.2934180,14.268333&spn=0.01,0.01&t=k&q=48.2934180,14.268333 [1]], 344m ASL, Station Code AT_LINZ_#) is mounted on top of a 3,5m pole on the balcony of the observatory building, to avoid shading by the dome as much as possible. To connect the Lightmeter with the PC, a ~7m extension of the USB cable is necessary. As no permanent Internet connection is available in the observatory, the data is uploaded manually. Also, the clock is set manually from time to time.

After some initial problems (see below), the lightmeter started continuous sky monitoring on 2009-04-21.

On 2014-06-29 the Windows PC running Jörg Weingrill's [http://hms.sternhell.at/lightwiki/Lightmeter-Driver%23Skysensor%20Software Skysensor-Software] has been replaced by a Laptop running the Lightmeter Software under Unbuntu (see below). The Station code has been changed from AT_LINZ_1 to AT_Linz_2 on that occasion.

Link to the old station-page: [http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Kepler-Sternwarte_Linz http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Kepler-Sternwarte_Linz] --[[User:Admin|GW]] ([[User talk:Admin|talk]]) 10:52, 30 June 2014 (CEST)

=== Preliminary Calibration ===

Accoring to Günther Wuchterl, the preliminary calibration for the Lightmeter #3 is:

*For < 1 lux: Lux = 3E-7 * counts (calibrated with a hand-held luxmeter)
*For > 1 lux to at least 20'000 lux: Lux = 2E-6 * (counts+exp(counts/8.7E4))

The latter is precise to ±10% on Lightmeter #2.

=== Final Calibration ===

Results of final calibration (described in detail here: [[Calibration example Linz]]):

X = c ( b (a exp (n(1+dT)/a) - 1) + n )

n ... counts (sensor output)

X ... physical quantity (total radiation in [W/m²]

or horizontal illumination [Lux])

a = 1.2835e+05, b = 1.6468e-02, c= 2.5778e-09 d= 3.4726e-03 W/m²

a = 1.2835e+05, b = 1.6468e-02, c= 3.1887e-07 d= 3.4726e-03 Lux

Background X0 = 6.741 mlx

=== Problems ===

There were two problems with Lightmeter in Linz. First, switching the fluorescent lamps on or off inside the observatory building crashes the Luxmeter driver. Second, due to the cable extension needed, the USB connection was unstable. A workaround for the first problem can be achived by setting up the software so that PC reboots every time the driver crashes. The solution for the second problem was found in using a USB-Extender USB-RJ45, which uses a 10m network cable to extend the original Lightmeter cable to the PC, and to use Jörg Weingrill's [[Lightmeter-Driver#Skysensor Software|Skysensor-Software]], which reboots the PC in case of USB errors.

For a more detailed description of the problems (in German language), see [[Lightmeter-Driver#USB-Fehler am Linzer Luxmeter]].

Sometimes, there is apparently a problem with the USB connection, no data is recorded, the Skysensor-Software does display "Error" in the status line, but still does not reboot the PC. On several occasions, this has gone unnoticed for several days, leading to long gaps in the measurements. To avoid this, we have installed a scheduled task which reboots the PC every day at 6:00, 12:00, 18:00 and 23:55 local time.

=== Replacement of the Computer ===

Due to increasing downtime of the Lightmeter, the PC runnig Jörg Weingrill's [http://hms.sternhell.at/lightwiki/Lightmeter-Driver%23Skysensor%20Software Skysensor-Software] under Windows XP has been replaced on 2014-06-29 by a Laptop running the Lightmeter Software under Unbuntu. The laptop was set up by Felix Linhardt. The Station code has been changed from AT_LINZ_1 to AT_LINZ_2 on that occasion.

The original sensor (Mark 2.2) is still in use. Also, data upload and clock check is still done manually at more or less regular intervals, about one in a month.

--[[User:HerbertRaab|HerbertRaab]] ([[User talk:HerbertRaab|talk]]) 08:52, 1 July 2014 (CEST)

=== Data on public lighting in Linz ===

According to [http://www.linz.at/images/LL_196_12_13_MehrLicht.pdf this article] from Ausgust 2010, 20'624 luminaries with a total of 23'206 lamps are used for public lighting in Linz (189'311 inhabitants, as of Jaunuary 2010). The total power comsumption for the public lighting is 2.01 Megawatts. Not included in these figures is, of course, the public lighting of neighbouring municipalities. (Note that the Kepler observatory is located close to the western city limit of Linz, towards the city of Leonding [24.976 inhabitants]). --[[Benutzer:HerbertRaab|HerbertRaab]] 09:01, 3. Sep. 2010 (UTC)

=== Results ===

*[http://dc.zah.uni-heidelberg.de/lightmeter/q/weather/form?__nevow_form__=genForm&date__day=1&date__month=1&date__year=2010&time=00%3A00%3A00&within=720&stationId=AT_LINZ_1&_DBOPTIONS_ORDER=&_DBOPTIONS_LIMIT=100&_FORMAT=HTML&submit=Go Query data at the GAVO data center] (Change parameters as necessary. Don't foget to select 'AT_LINZ_1' for the Staion ID. Set 'Output format' to 'VOPlot' to plot the data.)
*[http://dc.zah.uni-heidelberg.de/lightmeter/q/data/static/AT_LINZ_1/ Directory listing]

<gallery>
File:Linz-Observatory-Night.jpg|Kepler-Observatory and Lightmeter at night
File:Linz-AllSky_reloaded.jpg|All-sky image
File:L3 Linz April2009 mikt Mondproxy Linz.png|First measurements, April 2009
File:L3 Linz 23April2009.png‎|April 23, 2009
File:L3 Linz 23April2009 Detail Linzer Stufen.png‎|April 23, 2009 (zoomed)
File:L3 Linz Mai 2009.png|Night-Sky brightness in May 2009
File:Juni2009 Linz Wien Berlin Tautenburg.png|Sky brightness at various locations (June 2009)
File:L3 cal 24Augallday Lux mit T 2009 mooncheck.png|Example of fully calibrated data, Sept. 2009
File:L3 Linz Helligkeit Oktober.png|October 2009
</gallery>

Kepler-Sternwarte Linz

2014-07-01T06:52:42Z

HerbertRaab:

[[File:Luxmeter Kepler-Sternwarte 1.jpg|thumb|right]] [[File:Luxmeter Kepler-Sternwarte 2.jpg|thumb|right]] The Lightmeter (Mark 2.2) at the Kepler-Observatory in Linz, Austria (48° 17' 36.3" North, 14° 16' 06.0" East [http://maps.google.de/maps?ll=48.2934180,14.268333&spn=0.01,0.01&t=k&q=48.2934180,14.268333 [1]], 344m ASL, Station Code AT_LINZ_#) is mounted on top of a 3,5m pole on the balcony of the observatory building, to avoid shading by the dome as much as possible. To connect the Lightmeter with the PC, a ~7m extension of the USB cable is necessary. As no permanent Internet connection is available in the observatory, the data is uploaded manually. Also, the clock is set manually from time to time.

After some initial problems (see below), the lightmeter started continuous sky monitoring on 2009-04-21.

On 2014-06-29 the Windows PC running Jörg Weingrill's [http://hms.sternhell.at/lightwiki/Lightmeter-Driver%23Skysensor%20Software Skysensor-Software] has been replaced by a Laptop running the Lightmeter Software under Unbuntu (see below). The Station code has been changed from AT_LINZ_1 to AT_Linz_2 on that occasion.

Link to the old station-page: [http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Kepler-Sternwarte_Linz http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Kepler-Sternwarte_Linz] --[[User:Admin|GW]] ([[User talk:Admin|talk]]) 10:52, 30 June 2014 (CEST)

=== Preliminary Calibration ===

Accoring to Günther Wuchterl, the preliminary calibration for the Lightmeter #3 is:

*For < 1 lux: Lux = 3E-7 * counts (calibrated with a hand-held luxmeter)
*For > 1 lux to at least 20'000 lux: Lux = 2E-6 * (counts+exp(counts/8.7E4))

The latter is precise to ±10% on Lightmeter #2.

=== Final Calibration ===

Results of final calibration (described in detail here: [[Calibration example Linz]]):

X = c ( b (a exp (n(1+dT)/a) - 1) + n )

n ... counts (sensor output)

X ... physical quantity (total radiation in [W/m²]

or horizontal illumination [Lux])

a = 1.2835e+05, b = 1.6468e-02, c= 2.5778e-09 d= 3.4726e-03 W/m²

a = 1.2835e+05, b = 1.6468e-02, c= 3.1887e-07 d= 3.4726e-03 Lux

Background X0 = 6.741 mlx

=== Problems ===

There were two problems with Lightmeter in Linz. First, switching the fluorescent lamps on or off inside the observatory building crashes the Luxmeter driver. Second, due to the cable extension needed, the USB connection was unstable. A workaround for the first problem can be achived by setting up the software so that PC reboots every time the driver crashes. The solution for the second problem was found in using a USB-Extender USB-RJ45, which uses a 10m network cable to extend the original Lightmeter cable to the PC, and to use Jörg Weingrill's [[Lightmeter-Driver#Skysensor Software|Skysensor-Software]], which reboots the PC in case of USB errors.

For a more detailed description of the problems (in German language), see [[Lightmeter-Driver#USB-Fehler am Linzer Luxmeter]].

Sometimes, there is apparently a problem with the USB connection, no data is recorded, the Skysensor-Software does display "Error" in the status line, but still does not reboot the PC. On several occasions, this has gone unnoticed for several days, leading to long gaps in the measurements. To avoid this, we have installed a scheduled task which reboots the PC every day at 6:00, 12:00, 18:00 and 23:55 local time.

=== Replacement of the Computer ===

Due to increasing downtime of the Lightmeter, the PC runnig Jörg Weingrill's [http://hms.sternhell.at/lightwiki/Lightmeter-Driver%23Skysensor%20Software Skysensor-Software] under Windows XP has been replaced on 2014-06-29 by a Laptop running the Lightmeter Software under Unbuntu. The laptop was set up by Felix Linhardt. The Station code has been changed from AT_LINZ_1 to AT_Linz_2 on that occasion.

The original sensor (Mark 2.2) is still in use. Also, data upload and clock check is still done manually at more or less regular intervals, about one in a month.

--[[User:HerbertRaab|HerbertRaab]] ([[User talk:HerbertRaab|talk]]) 08:52, 1 July 2014 (CEST)

=== Data on public lighting in Linz ===

According to [http://www.linz.at/images/LL_196_12_13_MehrLicht.pdf this article] from Ausgust 2010, 20'624 luminaries with a total of 23'206 lamps are used for public lighting in Linz (189'311 inhabitants, as of Jaunuary 2010). The total power comsumption for the public lighting is 2.01 Megawatts. Not included in these figures is, of course, the public lighting of neighbouring municipalities. (Note that the Kepler observatory is located close to the western city limit of Linz, towards the city of Leonding [24.976 inhabitants]). --[[Benutzer:HerbertRaab|HerbertRaab]] 09:01, 3. Sep. 2010 (UTC)

=== Results ===

*[http://dc.zah.uni-heidelberg.de/lightmeter/q/weather/form?__nevow_form__=genForm&date__day=1&date__month=1&date__year=2010&time=00%3A00%3A00&within=720&stationId=AT_LINZ_1&_DBOPTIONS_ORDER=&_DBOPTIONS_LIMIT=100&_FORMAT=HTML&submit=Go Query data at the GAVO data center] (Change parameters as necessary. Don't foget to select 'AT_LINZ_1' for the Staion ID. Set 'Output format' to 'VOPlot' to plot the data.)
*[http://dc.zah.uni-heidelberg.de/lightmeter/q/data/static/AT_LINZ_1/ Directory listing]

<gallery>
File:Linz-Observatory-Night.jpg|Kepler-Observatory and Lightmeter at night
File:Linz-AllSky_reloaded.jpg|All-sky image
File:L3 Linz April2009 mikt Mondproxy Linz.png|First measurements, April 2009
File:L3 Linz 23April2009.png‎|April 23, 2009
File:L3 Linz 23April2009 Detail Linzer Stufen.png‎|April 23, 2009 (zoomed)
File:L3 Linz Mai 2009.png|Night-Sky brightness in May 2009
File:Juni2009 Linz Wien Berlin Tautenburg.png|Sky brightness at various locations (June 2009)
File:L3 cal 24Augallday Lux mit T 2009 mooncheck.png|Example of fully calibrated data, Sept. 2009
File:L3 Linz Helligkeit Oktober.png|October 2009
</gallery>