Light Pollution Map — Bortle Dark-Sky Scale, SQM & VIIRS Satellite Radiance | hoan.uk
Interactive global and Vietnam light pollution map using Suomi NPP VIIRS DNB satellite radiance. Calculate Bortle Class (1-9), Sky Quality Meter (SQM mag/arcsec²), Naked-Eye Limiting Magnitude (NELM), and find dark-sky stargazing sites.
Key Astrometric & Technical Capabilities
- Real-time Bortle Dark-Sky Scale (Class 1 to Class 9) and SQM (mag/arcsec²) calculator
- VIIRS DNB satellite upward radiance overlay and atmospheric scatter modeling
- Automatic Dark-Sky Site Finder for astrophotography and meteor shower observation