Data transparency
Data Sources and Licences
Every public GreenHalos data layer is designed to show its source and update time.
Source version: GreenHalos Master Specification 1.0 ·
NOAA Space Weather Prediction Center
GreenHalos uses NOAA SWPC data for operational auroral activity, geomagnetic forecasts, solar-wind summaries, alerts and space-weather scales.
Source: NOAA Space Weather Prediction Center. Processing and visualisation: GreenHalos. GreenHalos is not affiliated with or endorsed by NOAA or the National Weather Service, and GreenHalos transformations are not official NOAA products.
NASA CCMC DONKI
NASA CCMC DONKI can be used for research and space-weather event context. DONKI information is experimental or research context. For the official U.S. operational forecast, consult NOAA SWPC.
See how research event context is separated from operational forecasts on Space Weather Events.
Cloud cover and astronomy
Cloud information comes from the approved GreenHalos or Zenit weather pipeline and identified source records. GreenHalos caches and normalises MET Norway data for first-party delivery; changes were made.
Sun, darkness and moon calculations are performed locally using an open-source astronomical calculation library. Unknown cloud data is never treated as clear sky.
MET Norway cloud data is licensed under CC BY 4.0.
Globe assets
Earth textures, coastlines and borders are used only after asset-specific rights review and attribution. GreenHalos does not use NASA or NOAA logos as its own branding. Rights for an open dataset do not automatically apply to every logo, photograph or embedded third-party asset.