Total intensity · modeled
WMM2025 main/core field, degree and order 12. Official coefficients obtained from the CIRES-Geomagnetism repository. Evaluated at 2026-09-13 00:00 UTC and 4,000 m above the WGS84 ellipsoid. The globe is a spherical display, with field computation using WGS84 geodetic coordinates.
The 0.5° texture samples a smooth model. It does not turn WMM’s approximately 3,330 km resolving scale into local survey resolution. Field colors are unlit numerical colors. The probe evaluates the model directly rather than reading a color.
Twelve published test cases, covering 2025.0 and 2027.5, 0 and 100 km heights, and three locations, were reproduced within the reference table’s rounding: 0.05 nT for field components and 0.005° for angles. This measures software agreement, not real-world accuracy.
NOAA WMM2025 product and limitations ↗Pinned coefficient and test source ↗
EMAG2v3 is a compiled scalar crustal-anomaly grid, not a full vector field. NOAA’s upward-continued product is at 4 km above the WGS84 ellipsoid. The optional online view requests NOAA’s own color rendering. It is only enabled after a successful image response, and is not added to WMM. The remote rendering was not verified in the build environment; blocked network access leaves the WMM view intact.
NOAA EMAG2v3 product ↗Official image service ↗
WMMHR, the EMAG2 error/source rasters, USGS Ojai survey values, terrain, live observatory disturbance data and local observations are not ingested. WMMHR already contains long-wavelength crustal structure; a future fusion must account for overlap rather than summing datasets blindly.
This prototype supports scientific inspection. It does not establish magnetic localization accuracy, sensor calibration, assurance bounds, or operational navigation readiness. There are no generated field lines, sensor measurements, or claimed real-time disturbances.
