NASA  https://blackmarble.gsfc.nasa.gov/

Black Marble Daily Level 3 Products include 
the daily at-sensor top of atmosphere (TOA) nighttime radiance product (VNP46A1), 
and the daily moonlight-adjusted nighttime lights (NTL) product (VNP46A2)

NASA's Black Marble nighttime lights product suite (VNP46) is available at 500 m resolution since January 2012
with data from the Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) onboard the Suomi
National Polar-orbiting Platform (SNPP). The retrieval algorithm, developed and implemented for routine global
processing at NASA's Land Science Investigator-led Processing System (SIPS), utilizes all high-quality, cloud-free,
atmospheric-, terrain-, vegetation-, snow-, lunar-, and stray light-corrected radiances to estimate daily nighttime
lights (NTL) and other intrinsic surface optical properties. 

Key algorithm enhancements include: 
  (1) lunar irradiance modeling to resolve non-linear changes in phase and libration; 
  (2) vector radiative transfer and lunar
       bidirectional surface anisotropic reflectance modeling to correct for atmospheric and BRDF effects; 
  (3) geometric-optical and canopy radiative transfer modeling to account for seasonal variations in NTL; and 
  (4) temporal gap-filling to reduce persistent data gaps. 

Extensive benchmark tests at representative spatial and temporal scales were conducted on the VNP46 time series record to characterize the uncertainties stemming from upstream data sources. 

Initial validation results are presented together with example case studies illustrating the
scientific utility of the products. This includes an evaluation of temporal patterns of NTL dynamics associated
with urbanization, socioeconomic variability, cultural characteristics, and displaced populations affected by
conflict. Current and planned activities under the Group on Earth Observations (GEO) Human Planet Initiative

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NASA's Black Marble data are provided in the standard land HDF-EOS (Hierarchical Data Format - Earth Observing Syste
m) format. The filenames follow a naming convention which gives useful information regarding the specific product. For
 example, the filename
 
VNP46A1.A2015001.h08v05.001.2017012234657.hdf      indicates:

 * VNP46A1 - Product Short Name
 * .A2015001 - Julian Date of Acquisition (A-YYYYDDD)
 * .h08v05 - Tile Identifier (horizontalXX vertical YY)
 * 0.001 - Collection Version
 * .2017012234657- Julian Date of Production (YYYYDDDHHMMSS)
 * .hdf - Data Format (HDF-EOS)
 * Format (HDF-EOS)