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Author Schwarting, T., McIntire, J., Oudrari, H., & Xiong, X url  doi
openurl 
  Title JPSS-1/NOAA-20 VIIRS Day-Night Band Prelaunch Radiometric Calibration and Performance Type Journal Article
  Year 2019 Publication IEEE Transactions on Geoscience and Remote Sensing Abbreviated Journal (up)  
  Volume Issue Pages 1-13  
  Keywords Instrumentation  
  Abstract The Visible Infrared Imaging Radiometer Suite (VIIRS) on board the first Joint Polar-Orbiting Satellite System series 1 (JPSS-1) has a panchromatic, three gain stage, day-night band (DNB) capable of imaging the Earth under illumination conditions ranging from reflected moonlight to daytime scenes. The DNB has four charged-coupled devices (CCDs) with 32 different modes of time-delay integration and subpixel aggregation to achieve high SNR in low light conditions while maintaining roughly constant spatial resolution across scan. During the prelaunch testing phase, these 32 different aggregation modes are separately calibrated over a large dynamic range (covering seven orders of magnitude) through a series of radiometric tests designed to generate initial calibration coefficients for the sensor data record (SDR) operational algorithm, assess radiometric performance, and determine compliance with the sensor design requirements. Early in the environmental testing at the Raytheon El Segundo facility, nonlinear behavior was discovered in some DNB edge of scan aggregation modes at low signal levels. In response to this nonlinearity, the test program was altered to characterize the radiometric performance both in the baseline configuration and with a modified aggregation scheme that eliminates the modes used at the end of scan, replacing them with an unaffected adjacent mode and trading off spatial resolution for improved linearity. Presented in this paper is the radiometric performance under both sensor configurations including dynamic range, sensitivity, radiometric uncertainty, and nonlinearity along with a discussion of the potential impact to DNB on-orbit calibration and SDR performance.  
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  Call Number IDA @ intern @ Serial 2541  
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Author Chen, Z., Yu, B., Ta, N., Shi, K., Yang, C., Wang, C., Zhao, X., Deng, S., & Wu, J. url  doi
openurl 
  Title Delineating Seasonal Relationships Between Suomi NPP-VIIRS Nighttime Light and Human Activity Across Shanghai, China Type Journal Article
  Year 2019 Publication IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Abbreviated Journal (up)  
  Volume Issue Pages 1-9  
  Keywords Remote Sensing  
  Abstract The nighttime light (NTL) remote-sensing data have been widely applied in several applications for analyzing the urbanization process. The relationship between NTL intensity and human activity becomes a solid foundation for the applications using NTL data. However, there is no research, so far, revealing how the human activity seasonality could impact the seasonal change of NTL intensity. In this paper, a comparative analysis, box plot, and random forest algorithm were applied to NTL remote-sensing data and points of interest (POIs) data within Shanghai, China. The results show that in spring and autumn, the NTL is much brighter than that in summer and winter, especially within high human activity density area. The NTL intensity can be partly (approximately 40%) explained as the joint effects of the five POI categories. By analyzing the contributions of each POI category to NTL intensity, we found that the National Polar-Orbiting Partnership-Visible Infrared Imaging Radiometer Suite (NPP-VIIRS) could be used to dig more information about gross domestic product (GDP) and traffic-based applications with consideration of NTL seasonality.  
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  Notes Approved no  
  Call Number IDA @ intern @ Serial 2542  
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Author Sankhla, M., S., Sharma, K., & Kumar, R. url  openurl
  Title Impacts on Human & Environment of Night Time Light Pollution Type Journal Article
  Year 2019 Publication Galore International Journal of Applied Sciences and Humanities Abbreviated Journal (up)  
  Volume 3 Issue 2 Pages  
  Keywords Human Health; Ecology; Review  
  Abstract Light is chief source of human life. Humans are too much depended on light. High amount of use light are causing pollution to be a growing problem, however few research studies have addressed probable effects of light pollution on wildlife& humans. Astrophysicists consider light pollution to be a growing problem on worldwide. The night-sky illumination is originated to be effected by human factors such as land utilization and population density of the observation sites, together with meteorological and/or environmental factors. The interest in light pollution has been growing in many fields of science, extending from the traditional field of astronomy to atmospheric physics, environmental sciences, natural sciences and human sciences.  
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  Notes Approved no  
  Call Number IDA @ intern @ Serial 2543  
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Author Garstang, R.H. url  openurl
  Title Light Pollution at Mount Wilson: The Effects of Population Growth and Air Pollution Type Journal Article
  Year 2000 Publication Memorie della Società Astronomia Italiana Abbreviated Journal (up)  
  Volume 71 Issue 1 Pages  
  Keywords Skyglow  
  Abstract This is the first part of a study of the historical growth of light pollution at Mount Wilson Observatory. The night sky brightness at Mount Wilson due to light pollution from Los Angeles basin was calculated for the years 1910 to 1990, neglecting changes in lighting technology, and without any air pollution ('smog'). The very large effect of population growth is shown. We made a simple extension of our night sky brightness program to include a layer of smog. Two possibilities of constant density and finite thickness. The ground level density is determined by the visibility. We assume a smog layer whose density increases from zero in 1920 to appropriate values for the years from 1950. We added this layer to out model and repeated the Mount Wilson calculations. An average smog layer reduces the visual brightness at the present time by about 6 percent.  
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  Notes Approved no  
  Call Number IDA @ intern @ Serial 2544  
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Author Garstang, R. H. url  openurl
  Title Predictions of Future Light Pollution for Ground-Based Observatory Sites Type Journal Article
  Year 1989 Publication Bulletin of the American Astronomical Society Abbreviated Journal (up)  
  Volume 21 Issue Pages 759  
  Keywords Skyglow  
  Abstract In a paper now in press (P.A.S.P. March 1989) we have given details of an improved model for calculating the light pollution caused by one or more cities at an observatory or prospective observatory site. The principal difference in the new model from our earlier one is the inclusion of the effects of the curvature of the Earth, which are significant for the large cities at large distances from mountain observatories.  
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  Notes Approved no  
  Call Number IDA @ intern @ Serial 2545  
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