transit outage is an interruption in or distortion of geostationary satellite
signals caused by interference from solar radiation.
appears to be an extremely noisy source which completely blanks out the signal
from satellite. This effect lasts for 6 days around the equinoxes. They occur
for a maximum period of 10 minutes.
sun outages occur in February, March, September and October, that is, around
the time of the equinoxes.
these times, the apparent path of the sun across the sky takes it directly
behind the line of sight between an earth station and a satellite.
the sun radiates strongly at the microwave frequencies used to communicate with
satellites (C-band, Ka band and Ku band) the sun swamps the signal from the
effects of a sun outage can include partial degradation, that is, an increase
in the error rate, or total destruction of the signal.