LPMD : Stations status page

Network status

StationLast captureMPSASNELMTemp(C)
BEFERN012021/12/01 01:32:5719.214.938.7
BEWELL012021/10/10 06:18:3820.966.092.2
BEWEZE012021/10/28 15:38:35-0.1-13.7527

Color code

GreenLPMD box is alive and connected
OrangeLPMD box is alive, temporarely disconnected from network
RedLPMD box status is indetermined (but recording continues locally)

Project documentation

To discover LPMD project, please consult documentation page"

Station summary

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.
Typical valuesLocation type
Over 22best theorical dark sky reacheable on earth
22.0a moonless night sky that's completely free of artificial light pollution
21.0a rural area with a medium-sized city not far away
20.0suburbs of a major metropolis. Summer Milky Way is visible but severely washed out
19.0suburb with widely spaced single-family homes
18.0a bright suburb or dark urban neighborhood
17.0a typical sky near the center of a major city.
13.0zenith skyglow at the end of civil twilight, Venus and Jupiter are easy to see, but bright stars are just beginning to appear
7.0zenith skyglow at sunrise or sunset
below 7.0daylight

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.