Light Pollution Meter

In recent years, many accessible light pollution measurement methods are introduced into citizen science, including using the smartphone as a photometer to measure the night sky brightness.
In this contribution, we investigated the photometric response of different Android smartphones and explored using the Moon as a calibration standard.
We confirmed that smartphones have different instrumental zero points, and the Moon shows promising potential as a calibration standard.
We also identified gamma correction as a major obstacle for this field calibration method.
An app is developed for this paper and is released as open-source.
Features
- Smartphone photometry callibration from the Moon with techniques to combat saturation
- Light pollution measurement in mpsas using smartphone cameras
How to use:
1.
Measure dark frames by covering the phone in a box or against a dark wall.
2.
Measure the Moon brightness for calibration.
3.
Finally, measure the night sky in the absence of any direct light or moonlight.
This project is open-source, so contributions at GitHub are welcome.
If you encounter any bugs, or have any suggestions, feel free to contact me at [email protected]
Known drawbacks
- Atmospheric extinction is not considered
- Gamma correction can affect calculations significantly
GitHub
https: //github.com/jeqcho/Light-Pollution-Meter
Short paper
https: //drive.google.com/file/d/177zfkqyieAXbZgJEfdJpwL3a6cdHlF66/view?usp=sharing
Full paper
https: //drive.google.com/file/d/10wXDEiaP3Cp8eEAhlSJOvJIwVt1ebWIN/view?usp=sharing

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