Bronnen en licenties
Alle databronnen achter PolarPeek, met licentie en gevraagde bronvermelding.
PolarPeek gebruikt alleen officiële en open gelicentieerde bronnen. We gebruiken geen betaalde data en verspreiden geen ruwe bestanden van anderen.
| Data | Source | Licence / terms |
|---|---|---|
| Kp index, 3-day Kp forecast, OVATION aurora model | NOAA Space Weather Prediction Center | US government work, public domain. Credit: NOAA SWPC. No endorsement implied. |
| Kp archive since 1932 | GFZ Helmholtz Centre for Geosciences, Potsdam · Matzka et al. (2021), doi:10.5880/Kp.0001 | CC BY 4.0. The sunspot numbers in the same file (CC BY-NC) are not used. |
| Cloud cover forecast | MET Norway, Locationforecast | CC BY 4.0 and NLOD 2.0. Data from MET Norway. |
| ISS trajectory | NASA, ISS Trajectory Data | US government work, public domain. |
| Positions, phases, eclipses, seasons | astronomy-engine by Don Cross | MIT licence. |
| Meteor shower parameters | International Meteor Organization working list | Facts; our own text. |
| Constellation boundaries and names | International Astronomical Union | Facts; our own text. |
| Fonts | Fraunces, Inter Tight via Fontsource | SIL Open Font License 1.1. |