The Galician Night Sky Brightness Monitoring Network is the result of a joint collaboration between MeteoGalicia, the Galician public meteorological agency, and the Wavefront Sensors and Microoptics research group at Universidade de Santiago de Compostela (USC).
Its aim is to provide long-term and real-time data on the evolution of the brightness of our night skies in order to better understand the dynamics of our nighttime environment and help addressing the causes and consequences of light pollution.
It is based on low-cost SQM-LR luminance meters integrated in several of the automatic weather stations belonging to MeteoGalicia. Researchers and the public at large can access in real time the sky brightness measurements and relevant meteorological variables.
Fourteen measurement sites have been selected for the first phase of deployment of this Network, all of which (Santiago de Compostela, Lardeira, O Cebreiro, Areeiro, Guísamo, the harbour of Vigo, Fontaneira, Cabeza de Manzaneda, Xares, Paramos, Labrada, Illas Cíes, Illa de Ons and Illa de Sálvora) are already fully operative and online at the time of writing (July 1, 2015). Click on the image to see map.
Once completed, the Network covers a wide range of environments: urban, suburban and rural areas, from strongly light polluted city centers to natural parks with pristine dark skies, and from coastal regions to the Galician Eastern Mountain ranges.
According to the public service mission of both MeteoGalicia and the USC, the acquired data are available in open access.
Ten-minute averages of the brightness readings are computed and displayed at the Meteogalicia website. Data streams of the last few days can be seen as a graphic plots. A calibration offset of -0.1 mag/arcsec2 is applied to these readings before displaying them, in order to account for the transmittance of the detector housing glass window. Extended period datasets can be downloaded in different file formats together with the meteorological variables of interest.
Data can be accessed from the MeteoGalicia website: http://www.meteogalicia.es/Caire/brillodoceo.action You may also access them from the station list located below.
One-minute sampling rate datasets with detailed calibration factors for each detector are freely available for researchers and the interested public upon request.
|Santiago de Compostela||Station Main Page||Night Sky Brightness Plot||Data download|
|Lardeira||Station Main Page||Night Sky Brightness Plot||Data download|
|O Cebreiro||Station Main Page||Night Sky Brightness Plot||Data download|
|Areeiro||Station Main Page||Night Sky Brightness Plot||Data download|
|Guísamo||Station Main Page||Night Sky Brightness Plot||Data download|
|Porto de Vigo||Station Main Page||Night Sky Brightness Plot||Data download|
|Fontaneira||Station Main Page||Night Sky Brightness Plot||Data download|
|Cabeza de Manzaneda||Station Main Page||Night Sky Brightness Plot||Data Download|
|Xares||Station Main Page||Night Sky Brightness Plot||Data Download|
|Paramos||Station Main Page||Night Sky Brightness Plot||Data Download|
|Labrada||Station Main Page||Night Sky Brightness Plot||Data Download|
|Illas Cíes||Station Main Page||Night Sky Brightness Plot||Data Download|
|Illa de Ons||Station Main Page||Night Sky Brightness Plot||Data Download|
|Illa de Sálvora||Station Main Page||Night Sky Brightness Plot||Data Download|
- 2015 April 29: Manzaneda sensor is fixed and provides again useful data.
- 2015 April 07: Xares sensor is fixed and provides again useful data.
- 2015 Feb: Due to extreme weather conditions, the instrument towers of the Manzaneda and Xares stations were out of service from mid-february.
- 2014 December 12: First light of Illa de Sálvora sensor.
- 2014 September 24: First light of Illa de Ons sensor.
- 2014 June 16: First light of Paramos sensor.
- 2014 June 11: First light of Labrada sensor.
- 2014 May 21: First light of Cies Islands sensor.
- 2014 May 07: First light of Xares sensor.
- 2014 April 15: First light of Cabeza de Manzaneda sensor.
- 2014 April 10: First light of Fontaneira sensor.
- 2014 April 08: First light of the Vigo (harbour) sensor.
- 2014 March 26: Lardeira station sensor requires servicing, after heavy winds and snowstorms (readings temporarily unreliable).
- 2014 March 17: First light of Areeiro and Guísamo sensors.
- 2013 Oct 25: First light of O Cebreiro sensor.
- 2013 Oct 15: First light of Lardeira sensor.
- 2013 Sept 09: First light of Santiago de Compostela sensor.
Disclaimer: These data may undergo different validation procedures as time goes by, and hence they may be modified. Neither MeteoGalicia nor the USC can be held liable for the different uses or interpretations that the user may make of these data.
Cláusula de responsabilidade no uso dos datos: Os datos aquí amosados son sometidos a distintas rutinas de validación sucesivas ao longo do tempo, polo que poden darse modificacións dos mesmos. Nin MeteoGalicia nin a USC asumen responsabilidade algunha sobre as diversas utilizacións ou interpretacións que o usuario poida facer dos datos subministrados.