| Records |
| Author |
Elvey, C.T.; Roach, F.E. |
| Title |
A Photoelectric Study of the Light from the Night Sky |
Type |
Journal Article |
| Year |
1937 |
Publication |
The Astrophysical Journal |
Abbreviated Journal |
ApJL |
| Volume |
85 |
Issue |
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Pages  |
213 |
| Keywords |
Instrumentation; Sky Brightness |
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| ISSN |
0004-637X |
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| Call Number |
GFZ @ kyba @ |
Serial |
2399 |
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| Author |
Jechow, A.; Ribas, S.J.; Domingo, R.C.; Hölker, F.; Kolláth, Z.; Kyba, C.C.M. |
| Title |
Tracking the dynamics of skyglow with differential photometry using a digital camera with fisheye lens |
Type |
Journal Article |
| Year |
2018 |
Publication |
Journal of Quantitative Spectroscopy and Radiative Transfer |
Abbreviated Journal |
Journal of Quantitative Spectroscopy and Radiative Transfer |
| Volume |
209 |
Issue |
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Pages |
212-223 |
| Keywords |
Skyglow; Instrumentation |
| Abstract |
rtificial skyglow is dynamic due to changing atmospheric conditions and the switching on and off of artificial lights throughout the night. Street lights as well as the ornamental illumination of historical sites and buildings are sometimes switched off at a certain time to save energy. Ornamental lights in particular are often directed upwards, and can therefore have a major contribution towards brightening of the night sky. Here we use differential photometry to investigate the change in night sky brightness and illuminance during an automated regular switch-off of ornamental light in the town of Balaguer and an organized switch-off of all public lights in the village of Àger, both near Montsec Astronomical Park in Spain. The sites were observed during two nights with clear and cloudy conditions using a DSLR camera and a fisheye lens. A time series of images makes it possible to track changes in lighting conditions and sky brightness simultaneously. During the clear night, the ornamental lights in Balaguer contribute over 20% of the skyglow at zenith at the observational site. Furthermore, we are able to track very small changes in the ground illuminance on a cloudy night near Àger. |
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0022-4073 |
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no |
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LoNNe @ kyba @ |
Serial |
1807 |
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| Author |
Zeng, X.; Shao, X.; Qiu, S.; Ma, L.; Gao, C.; Li, C. |
| Title |
Stability Monitoring of the VIIRS Day/Night Band over Dome C with a Lunar Irradiance Model and BRDF Correction |
Type |
Journal Article |
| Year |
2018 |
Publication |
Remote Sensing |
Abbreviated Journal |
Remote Sensing |
| Volume |
10 |
Issue |
2 |
Pages |
189 |
| Keywords |
Instrumentation; Remote Sensing |
| Abstract |
The unique feature of the Visible Infrared Imager Radiometer Suite (VIIRS) day/night band (DNB) is its ability to take quantitative measurements of low-light scenes at night. In order to monitor the stability of the high gain stage (HGS) of the DNB, nighttime observations over the Dome C site under moonlight are analyzed in this study. The Miller and Turner 2009 (MT2009) lunar irradiance model has been used to simulate lunar illumination over Dome C. However, the MT2009 model does not differentiate the waxing and waning lunar phases. In this paper, the MT-SWC (SeaWiFS Corrected) lunar irradiance model differentiating the waxing and waning lunar phases is derived by correcting the MT2009 model using lunar observations made by the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS). In addition, a top of atmosphere (TOA) bi-directional reflectance distribution function (BRDF) model during nighttime over Dome C is developed to remove the angular dependence from the nighttime TOA reflectance. The long-term stability monitoring of the DNB high-gain stage (HGS) reveals a lower reflectance factor in 2012 in comparison to the following years, which can be traced back to the change in relative spectral response (RSR) of National Oceanic & Atmospheric Administration’s (NOAA’s) Interface Data Processing Segment (IDPS) VIIRS DNB in April 2013. It also shows the radiometric stability of DNB data, with long-term stability of less than 1.58% over the periods from 2013 to 2016. This method can be used to monitor the radiometric stability of other low-light observing sensors using vicarious calibration sites under moonlight illumination. |
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| ISSN |
2072-4292 |
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no |
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LoNNe @ kyba @ |
Serial |
1805 |
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| Author |
Kruse, F.A.; Elvidge, C.D. |
| Title |
Characterizing urban light sources using imaging spectrometry |
Type |
Journal Article |
| Year |
2011 |
Publication |
Proceedings of the Joint Urban Remote Sensing Event 2011, April 13-11, Munich, Germany |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
149 - 152 |
| Keywords |
Instrumentation |
| Abstract |
Remote mapping of night lights has been used for decades for mapping urbanization and the global distribution of human activity. Most of this has been accomplished using remote sensing data from the Defense Meteorological Satellite Program (DMSP). The coarse spatial and spectral resolution of DMSP, however, has precluded discrimination of lighting types or spectral characteristics. Recent demonstrations using photography from the International Space Station and airborne multispectral simulations demonstrate significant potential, but high-spectral-resolution field and laboratory measurements indicate that these methods do not take full advantage of the spectral information available. This research demonstrates the use of imaging spectrometer data to identify, characterize, and map urban lighting based on spectral emission lines unique to specific lighting types. ProSpecTIR imaging spectrometer data were analyzed to extract spectral features and these were compared to spectral library measurements on a pixel-by-pixel basis, resulting in a detailed spatial map showing different lighting types. The nature and distribution of lights can be used as a surrogate for measurement of urban development. |
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LoNNe @ christopher.kyba @ |
Serial |
469 |
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| Author |
Lee, S.; Cao, C. |
| Title |
Soumi NPP VIIRS Day/Night Band Stray Light Characterization and Correction Using Calibration View Data |
Type |
Journal Article |
| Year |
2016 |
Publication |
Remote Sensing |
Abbreviated Journal |
Remote Sensing |
| Volume |
8 |
Issue |
2 |
Pages |
138 |
| Keywords |
Instrumentation |
| Abstract |
The Soumi NPP VIIRS Day/Night Band (DNB) nighttime imagery quality is affected by stray light contamination. In this study, we examined the relationship between the Earth scene stray light and the signals in VIIRS’s calibrators to better understand stray light characteristics and to improve upon the current correction method. Our analyses showed the calibrator signal to be highly predictive of Earth scene stray light and can provide additional stray light characteristics that are difficult to obtain from Earth scene data alone. In the current stray light correction regions (mid-to-high latitude), the stray light onset angles can be tracked by calibration view data to reduce correction biases. In the southern hemisphere, it is possible to identify the angular extent of the additional stray light feature in the calibration view data and develop a revised correction method to remove the additional stray light occurring during the southern hemisphere springtime. Outside of current stray light correction region, the analysis of calibration view data indicated occasional stray light contamination at low latitude and possible background biases caused by Moon illumination. As stray light affects a significant portion of nighttime scenes, further refinement in characterization and correction is important to ensure VIIRS DNB imagery quality for Soumi NPP and future missions. |
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2072-4292 |
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no |
| Call Number |
LoNNe @ kyba @ |
Serial |
1378 |
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