Reference-Free Radiometric Normalization of SDGSAT-1 Imagery Unveils Urban Lighting’s Spectral Transition (opens in new tab)

The Sustainable Development Goals Science Satellite 1 (SDGSAT-1) provides high-resolution multispectral nighttime light (NTL) data, enabling improved applications in NTL remote sensing. However, multitemporal NTL observations are often affected by radiometric inconsistencies due to atmospheric conditions and sensor variability. Although relative radiometric normalization (RRN) can improve the temporal consistency, existing reference-dependent RRN methods face challenges in selecting suitable ...