Noise that originates from the Sun is called solar noise.

No, Director, just solar noise so far.

(With L.L. McCready) Ionospheric effects noted during dawn observations on solar noise.

Finally, beyond the high frequency band (3-30 MHz) extraterrestrial noise (noise of galactic origin, solar noise) dominates.

High levels of sunspot activity lead to improved signal propagation on higher frequency bands, although they also increase the levels of solar noise and ionospheric disturbances.

(With D.E. Yabsley and J.G. Bolton) Relative times of arrival of bursts of solar noise on different radio frequencies.

The need for autonomy originates from problems such as insufficient ground coverage, communication geometry, being too near the Earth-Sun line (where solar noise interferes with radio frequencies), or simply for security purposes.