|Green||LPMD box is alive and connected|
|Orange||LPMD box is alive, temporarely disconnected from network|
|Red||LPMD box status is indetermined (but recording continues locally)|
To discover LPMD project, please consult documentation page"
To get a station PL overview (5 last days), click on left links
Query station information
Information on "sky brightness"
|Key values are provided in Magnitude per square arcsecond or MPSAS. MPSAS numbers are commonly used in astronomy to measure sky darkness (higher value means darker).
This vale could also be expressed in NELM (Naked Eyes Limiting Magnitude) which roughly indicates human eyes visibles stars limit.
A +1 magnitude means 2.5 times less light is coming from a given area of sky. A 5 mags/sq arcsec change means a 100x darker or brighter sky.
All average or duration computation are made with >= 13 MPSAS values (considered as 'local night' after civil twilight) and with >= 19 MPSAS values (considered as 'dark night' condition)
Data recording is gnerally executed on a 5 min period (but could be ajusted for some studies), send to a central database synchronized each day.