Details

Autor(en) / Beteiligte

• Bará, Salvador
• Tapia, Carlos E
• Zamorano, Jaime

Titel

Absolute Radiometric Calibration of TESS-W and SQM Night Sky Brightness Sensors

Ist Teil von

• Sensors (Basel, Switzerland), 2019-03, Vol.19 (6), p.1336

Ort / Verlag

Switzerland: MDPI

Erscheinungsjahr

2019

Link zum Volltext

Quelle

EZB*

Beschreibungen/Notizen

• We develop a general optical model and describe the absolute radiometric calibration of the readings provided by two widely-used night sky brightness sensors based on irradiance-to-frequency conversion. The calibration involves the precise determination of the overall spectral sensitivity of the devices and also the constant relating the output frequency of the light-to-frequency converter chip to the actual band-weighted and field-of-view averaged spectral radiance incident on the detector (brightness). From these parameters, we show how to define a rigorous astronomical absolute photometric system in which the sensor measurements can be reported in units of magnitudes per square arcsecond with precise physical meaning.