Five month ago, we were initiating the V.I.G.I.E project. Since then some 20 pictures and 3 videos have been received.
As a reminder, the V.I.G.I.E project : « Visual Integrated Geolocalisation for Identification Experiment » (Expérimentation d’identification et de géolocalisation visuelle automatique) http://vigie.ufo-science.com can only move forward with the involvement of everyone.
If you want to be part of it, nothing is simpler.
- I own a diffraction grating : : put the grating in front of the lens and take – best case – a picture of a streetlight sodium bulb (switched on, by night, giving orange light). Distance to streetlight should be over 30 meters. Pay attention to correctly center the bulb in the picture.

- I do not own a diffraction grating : you can get one – either as a slide, or a self-adhesive for mobile phone, by visiting our website. You can anyhow take a picture under same conditions as described above while waiting for your diffraction grating.
IMPORTANT
If you have a mobile phone equipped with an imaging device with geolocation capabilities intégré (GPS and/or compass). Think to activate it before shooting, to simultaneously record geolocation data.
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Once the shooting is done, send pictures to the email address mentioned here above, and indicate the DIFFRACTON GRATING TYPE used (SLIDE or Self-Adhesive).