A Consistent and Corrected Nighttime Light dataset (CCNL 1992-2013) from DMSP-OLS data

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