Ethernet Sky Quality Meter with Lens (SQM-LE)

Description

Ethernet Sky Quality Meter with Lens (SQM-LE)

Een ethernet-enabled SQM-model voor het bewaken van de nachtelijke hemelhelderheid! Een betaalbare meter voor continue, geconnecteerde meting van de hemelhelderheid voor astronomen! De “Sky Quality Meter – LE” meet de helderheid van de nachtelijke hemel in magnitudes per vierkante boogseconde

Uses:

• Find out how good the night or site REALLY is.
• Compare the sky brightness at different sites quantitatively.
• Document the evolution of light pollution in your area.
• Set planetarium dome illumination to mimic the skies people are likely to experience elsewhere in the city.
• Monitor sky brightness through the night, night-to-night, and year-to-year.
• Determine which nights show the greatest promise for finding the ‘faintest fuzzies’!
• Calibrate the effect of sky brightness on qualitative measures such as the Bortle Scale.
• Investigate how sky brightness correlates with the solar cycle and month-to-month sunspot activity.
• Help provide local ground truth for future sky brightness prediction with the Clear Sky Clock.
• CCD users can make a correlation between the SQM reading and when the background reaches some ADC level.

Features:

• Sky brightness reported in visual magnitudes per square arcsecond.
• Infrared blocking filter restricts measurement to visual bandpass.
• Sensor temperature, model number, and serial number are provided.
• Precision readings at even the darkest sites.
• Field-upgradeable firmware
• Open protocol document

Specificaties van de Ethernet Sky Quality Meter with Lens (SQM-LE) zijn:

• Ethernet connectivity
• Included applications for reading data in Java, C, Perl, Python.
• The Half Width Half Maximum (HWHM) of the angular sensitivity is ~10°. The Full Width Half Maximum (FWHM) is then ~20°.
• The sensitivity to a point source ~19° off-axis is a factor of 10 lower than on-axis.
•  A point source ~20° and ~40° off-axis would register 3.0 and 5.0 magnitudes fainter, respectively.
• Operates from 5-6VDC adapter (included).
• Size 3.6 x 2.6 x 1.1 in.
• Maximum light sampling time: 80 seconds.
• Minimum light sampling time: 1 seconds.
• Specifications are subject to change without notice.

What you get: