Primary sources and dataset references (for methodology context):
- NASA Black Marble (VIIRS Nighttime Lights): https://blackmarble.gsfc.nasa.gov/
- NOAA/EOG VIIRS Nighttime Lights products: https://eogdata.mines.edu/products/vnl/
- Google Earth Engine dataset catalog (VIIRS DNB monthly composites): https://developers.google.com/earth-engine/datasets/catalog/NOAA_VIIRS_DNB_MONTHLY_V1_VCMCFG
