NOAA / Space Weather Prediction Center SWPC Navigation Systems
The behavior of the Earth's magnetic field is the most
significant factor for GPS operations in this locale. Select the
Planetary K-Index Plot to see if the magnetic field has been
disturbed, as denoted by red bars, during the past 72 hours.
Particle precipitation in the auroral zone results in increased
scintillation in the ionosphere. The auroral oval is usually
near the areas of increased scintillation. GPS operations may be
hampered when the signals from the spacecraft to the ground pass
through the auroral oval. The NOAA/TIROS Hemispheric Power Input
Plotshows the likely location of the auroral oval, using recent
data. The auroral oval will move equatorward when geomagnetic
activity increases. Large quantities of solar energetic
particles can also cause scintillation at high latitudes. Check
the Proton Flux Plot to determine if the proton environment is
enhanced. If the red trace (E >10 MeV) exceeds 1.0E+1,
conditions may exist that are adver