DMSP-OLS provides the longest observations of NTL information, from 1992 to 2013, an unparalleled dataset for studying historical artificial lights. Version 4 of the DMSP-OLS Nighttime Lights Time Series is widely used ( Image and data processing by NOAA's National Geophysical Data Center. DMSP data collected by US Air Force Weather Agency ). However, it suffers from three main problems: inter-annual inconsistency, saturation, and blooming effect. We used a series of methods to mitigate the impact and improve data quality. After processing, we get consistent and corrected nighttime light dataset (CCNL). The version 1 products span the globe from 75N latitude to 65S. The products are produced in 1000m resolution and are made available in GeoTIFF format. Each year has two scenes. Each GeoTIFF filename has 4 filename fields that are separated by an underscore "_". These fields are followed by a filename extension. The fields are described below using this example filename: CCNL_1992_1_1.0 Field 1: CCNL(Consistent and Corrected Nighttime Light dataset) Field 2: year "1992" Field 3: first scene “1” Field 4: version “1.0”

{"references": ["Cao X, Hu Y, Zhu X, et al. A simple self-adjusting model for correcting the blooming effects in DMSP-OLS nighttime light images[J]. Remote Sensing of Environment, 2019, 224: 401-411.", "Wu, J., He, S., Peng, J., Li, W., Zhong, X., 2013. Intercalibration of DMSP/OLS night-time light data by the invariant region method. Int. J. Remote Sens. 34, 7356\u20137368."]}