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Our Data Sources

PolarForecast is powered by real satellite telemetry from space agencies, not proprietary models. Every number you see on this site can be traced back to a primary source.

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NOAA Space Weather Prediction Center

NOAA SWPC

Our primary data provider. NOAA's SWPC operates 24/7 to monitor the Sun and the near-Earth space environment. We pull real-time KP index values, 3-day geomagnetic forecasts, 27-day outlooks, and X-ray flux data directly from SWPC's JSON feeds every 15 minutes.

Real-time KP index3-hour estimated KP27-day solar activity forecastX-ray flux (GOES)Geomagnetic storm alerts
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NOAA DSCOVR Satellite

DSCOVR / ACE

The Deep Space Climate Observatory (DSCOVR) sits at the L1 Lagrange point β€” 1.5 million km sunward of Earth β€” giving us approximately 15–60 minutes of warning before solar wind disturbances arrive. The onboard PLASMAG and MAG instruments measure solar wind speed, density, temperature, and the critical Bz component of the interplanetary magnetic field.

Solar wind speed (km/s)Proton density (p/cmΒ³)Bz component (nT)Bt total field strengthPlasma temperature
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NASA Goddard Space Flight Center

NASA GSFC

NASA provides long-range solar cycle data and coronal mass ejection (CME) analysis via the Space Weather Research Center. We integrate NASA's solar energetic particle data and SDO imagery links to give context to active space weather events.

Solar cycle progression dataCME catalogueSolar Dynamics Observatory imagerySolar energetic particle events
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European Space Agency

ESA

ESA's Space Weather Service Network contributes supplementary geomagnetic index data from European ground stations. The ESA Swarm constellation β€” three satellites in polar orbit β€” provides real-time magnetic field measurements that complement NOAA's ground-based network.

Swarm magnetic field dataEuropean K-index measurementsIonospheric scintillation data
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National Weather Services

Cloud Data

Cloud cover forecasts are sourced from national meteorological services including the Norwegian Meteorological Institute (Met.no), the UK Met Office, and NOAA's GFS model. We overlay cloud probability with geomagnetic activity to calculate a composite aurora viewing score for each location.

Met.no hourly cloud coverGFS global cloud modelUK Met Office cloud APIVisible satellite imagery
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OpenWeatherMap

OWM

OpenWeatherMap provides location-specific current weather conditions and 5-day hourly forecasts for each aurora destination. We use OWM data to display temperature, cloud cover percentage, and wind speed on location pages β€” helping you plan both aurora chasing and travel logistics in one place.

Current conditions per locationHourly cloud cover %Temperature & feels-likeWind speed & direction5-day daily summary
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Auroras.live

Aurora Probability

Auroras.live provides supplementary real-time aurora probability data, offering an additional data point alongside NOAA's KP-based forecasts. Cross-referencing multiple independent probability sources helps reduce false positives and gives a more reliable composite viewing score.

Real-time aurora probabilityLocation-specific visibility estimateActivity trend indicator
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How the Data Reaches You

From satellite measurement to your screen, this is the data pipeline that powers every forecast on PolarForecast.

01
Satellite Ingestion
DSCOVR/ACE solar wind data arrives at NOAA SWPC and is published via JSON feeds every 60 seconds.
02
KP Calculation
SWPC processes readings from 13 geomagnetic observatories worldwide and publishes the estimated KP index every 15 minutes.
03
PolarForecast Fetch
Our backend pulls all live feeds on a 15-minute schedule, normalises units, and caches the results.
04
Forecast Modelling
We combine real-time KP, solar wind speed, Bz, and cloud cover to produce location-specific viewing scores.
05
You See the Data
Within seconds of NOAA publishing, the live numbers on PolarForecast update β€” no refresh required.