Data attributions
Every Skyhook tour is rendered from open Earth-observation data. We are grateful to the agencies and teams who measure the planet and publish what they find — this product exists because their work is open. The sources below feed the imagery you see; none of them receives any information about you (see the privacy policy).
Land, ocean & terrain
- Surface color — Copernicus Sentinel-2 Level-3 quarterly cloud-free mosaic (ESA / European Union Copernicus programme). Contains modified Copernicus Sentinel data 2023.
- Terrain elevation — Copernicus DEM GLO-30. © DLR e.V. 2010–2014 and © Airbus Defence and Space GmbH 2014–2018, provided under COPERNICUS by the European Union and ESA; all rights reserved.
- Land cover — © ESA WorldCover project 2021 (CC BY 4.0). Contains modified Copernicus Sentinel data 2021.
- Bathymetry & global relief — NOAA ETOPO 2022 Global Relief Model (NOAA National Centers for Environmental Information).
- City lights at night — NASA Black Marble VNP46A4 (VIIRS Day/Night Band annual composite, NASA Goddard Space Flight Center).
Clouds & weather
- Current clouds — NOAA/NESDIS JPSS Enterprise VIIRS cloud products (cloud height, mask, phase, and optical properties from the Suomi NPP, NOAA-20, and NOAA-21 satellites), via NOAA Open Data Dissemination. Cloud-base estimation follows the NOAA Enterprise Cloud Base Algorithm.
- Ocean surface wind — ERA5 monthly-averaged reanalysis (ECMWF / Copernicus Climate Change Service). Contains modified Copernicus Climate Change Service information 2026.
Neither the European Commission nor ECMWF is responsible for any use that
may be made of the Copernicus information or data it contains.
The night sky
- Bright stars — derived from the HYG database (astronexus, CC BY-SA 4.0), a compilation of the ESA Hipparcos and Yale Bright Star catalogs.
- Milky Way & diffuse starlight — NASA's Scientific Visualization Studio, "Deep Star Maps 2020" (Ernie Wright), built from Gaia DR2 and Tycho-2.
- The Moon — NASA CGI Moon Kit (Lunar Reconnaissance Orbiter LROC color map, NASA/GSFC Scientific Visualization Studio).
The atmosphere, ocean optics, and cloud lighting are computed physically by the Skyhook renderer — see how it works. Attributions cover the data sources; the agencies named do not endorse this product.