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Author (up) Letu, H.; Tana, G.; Hara, M.; Nishio, F.
Title Monitoring the electric power consumption by lighting from DMSP/OLS nighttime satellite imagery. Type Journal Article
Year 2011 Publication Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International Abbreviated Journal
Volume Issue Pages 2113-2116
Keywords Economics
Abstract In this study, we attempted to estimate the electric power consumption using the Defense Meteorological Satellite Program (DMSP)/Operational Linescan System (OLS) stable light imagery after correction for saturation effected. Digital numbers (DNs) of a stable light image are saturated in the center of city areas. Thus, we developed a saturated light correction method for the DMSP/OLS stable light image using the radiance calibration image of DMSP/OLS nighttime imagery. The comparison between the stable light image for 1999 and the radiance calibration image for 1996-1997 in major areas of Japan showed a strong linear correlation (Ysta = 17Xrad 102) between the DNs of both images. Saturated DNs of the stable light image could therefore be corrected based on the correlation equation between the two images. To estimate the electric power consumption, regression analysis was performed between statistic data of electric power consumption from lighting and cumulative DNs of the stable light image before and after correcting for the saturation effects using the new and the conventional methods of the cubic regression equation (CRE). There is a stronger improvement of the determination coefficient with the new saturated light correction method (R =0.91, P=4.5·106<;0.05) than with the conventional method (R2=0.81, P=2.6-106<;0.05) from the initial correlation with the uncorrected data (R2=0.70, P=1.7-106<;0.05).
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Call Number LoNNe @ christopher.kyba @ Serial 438
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Author (up) Zhifeng, L.; Chunyang, H.; Yang, Y.
Title Mapping urban areas by performing systematic correction for DMSP/OLS Nighttime Lights Time Series in China from 1992 to 2008. Type Journal Article
Year 2011 Publication Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International Abbreviated Journal
Volume Issue Pages 1858-1861
Keywords Economics
Abstract The stable lights data in the Version 4 Nighttime Lights Time Series Dataset gained by the Defense Meteorological Satellite Program's Operational Line-scan System can't be used to map urban areas directly because the data has no on board calibration and many unstable lights are also included in the data. So the systematic correction was performed before the urban areas extraction according to the characteristic of stable lights data in China from 1992 to 2008 with the 1 km spatial resolution. It was found that, with systematic correction, the stable lights data could be strictly comparable from one year to the next, in which the remarkable differences of digital number values and the unstable lights were removed effectively. Besides, the urban areas extracted from the stable lights data could be used to describe the real process of urban expansion in China from 1992 to 2008.
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Call Number LoNNe @ christopher.kyba @ Serial 440
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