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Update home authored by José Carlos Dafonte Vázquez's avatar José Carlos Dafonte Vázquez
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# FreeDSM (Free Dark Sky Meter) # FreeDSM (Free Dark Sky Meter)
## This DIY photometer is part of the project [_Gaia4sustainability_](https://gaia4sustainability.eu/language/en/gaia-4-sustainability/) ## This DIY photometer is part of the project [_Gaia4sustainability_](https://gaia4sustainability.eu/language/en/gaia-4-sustainability/)
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![MICINN](img/MICINN.png)
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![MICINN](/lia2-publico/g4s/-/wikis/home/img/MICINN.png)
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The **FreeDSM** allows you to measure the quality of the sky background during your night observations. It is a photometric instrument that incorporates the Osram TSL2591 sensor, with two diodes: one will make a measurement in the infrared range and the other in the full spectrum. From the data proviced by those diodes, it calculates the mpsas measurements every minute (its range is 12-23 mpsas) but algo temperature and humidity (sensor AHT2x). The **FreeDSM** allows you to measure the quality of the sky background during your night observations. It is a photometric instrument that incorporates the Osram TSL2591 sensor, with two diodes: one will make a measurement in the infrared range and the other in the full spectrum. From the data proviced by those diodes, it calculates the mpsas measurements every minute (its range is 12-23 mpsas) but algo temperature and humidity (sensor AHT2x).
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