{{Short description|Multiple receivers for satellite communication}} {{Multiple issues|{{more categories|date=February 2025}} {{refimprove|date=March 2026}} }} '''Site diversity''' is a technique used to improve the reliability of satellite communications by limiting atmospheric effects, particularly those caused by rain fade. A diversity scheme is typically required when using frequencies in the Ka, V, or W band.<ref>{{Cite journal |last=Callaghan |first=S. A. |last2=Boyes |first2=B. |last3=Couchman |first3=A. |last4=Waight |first4=J. |last5=Walden |first5=C. J. |last6=Ventouras |first6=S. |date=16 August 2008 |title=An investigation of site diversity and comparison with ITU‐R recommendations |url=https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2007RS003793 |journal=Radio Science |language=en |volume=43 |issue=4 |doi=10.1029/2007RS003793 |issn=0048-6604}}</ref>
The downlink transmissions of satellites cover large areas that may have different weather. The site diversity technique consists of linking two or more ground stations receiving the same signal: this way, if the signal is heavily attenuated in one area, another ground station can compensate. Areas of intense rain often have a horizontal length of no more than a few kilometers: putting the ground stations at a sufficient distance reduces the possibility of rain fade in the downlink signal.
The configuration works when the attenuation is not great at the two stations simultaneously, which is usually a valid assumption. Site diversity systems have been known to minimize disruption of service by major satellite carriers.
==See also== *Antenna diversity *Diversity combining
==References== {{reflist}}
{{DEFAULTSORT:Site Diversity}} Category:Satellite television
{{Comm-stub}}