Globe at Night - Sky Brightness Monitoring Network (GaN-MN)
The GaN-MN project, an extension of the original Globe at Night project, is a global night sky brightness monitoring network using a commercially available meter (SQM-LE by Unihedron) for long-term monitoring of the light pollution conditions in different places around the world.
The project aims to:
- deploy a standardized night sky measurement method for worldwide light pollution research;
- highlight the negative environmental impacts of abusive artificial lighting for the general public and policy makers; and
- sustain light pollution public education and promote public engagement by live worldwide night sky brightness data and night sky measuring programs.
About the GaN-MN Data
Globe at Night is hosting data taken by this network. It can be downloaded as a CSV file that can be opened in any spreadsheet application. The file has the following headers:
- unique ID for each data entry
- timestamp according to the server clock
- timestamp converted to UTC
- timestamp corrected to local time
- serial number of SQM-LE
- nsb, sensor_frequency, sensor_period_count, sensor_period_second, temperature:
- raw data reported by the unit, where nsb: reading in magnitudes per square arc second, see section 8.6 of the manual
- code of monitoring station (location of SQM-LE), complete list
Download the GaN-MN Data
- Jan, 2018 (149 MB)
- Data are released on a monthly basis. For example, the CSV file of January 2015 contains the raw data collected from 00:00:00 January 1st, 2015 to 23:59:59 January 31st, 2015 UTC and sorted by the received_utc.
- The GAN-MN data is posted by six months after it has been collected. Data collected in January will be posted six months later, in July.
- The data is posted as CSV files that may be opened in a spreadsheet or a text editor.
- Data released are provisional as there is only limited quality check. Please contact GaN-MN (email@example.com) for details.