Editing Rain fade (section)

== Uplink power control ==

The simplest way to compensate the rain fade effect in [[satellite communications]] is to increase the transmission power: this dynamic fade countermeasure is called '''uplink power control''' (UPC).<ref>{{Cite web |date=May 1, 2021 |title=Rain Fade |url=https://www.everythingrf.com/community/what-is-rain-fade |access-date=October 27, 2023 |website=everythingrf.com}}</ref> Until more recently, uplink power control had limited use, since it required more powerful transmitters – ones that could normally run at lower levels and could be increased in power level on command (i.e. automatically). Also uplink power control could not provide very large signal margins without compressing the transmitting amplifier.<ref>{{Cite journal |last1=Samad |first1=Md Abdus |last2=Diba |first2=Feyisa Debo |last3=Choi |first3=Dong-You |date=January 2021 |title=A Survey of Rain Fade Models for Earth–Space Telecommunication Links—Taxonomy, Methods, and Comparative Study |journal=Remote Sensing |language=en |volume=13 |issue=10 |pages=1965 |doi=10.3390/rs13101965 |issn=2072-4292 |doi-access=free |bibcode=2021RemS...13.1965S }}</ref> Modern amplifiers coupled with advanced uplink power control systems that offer automatic controls to prevent transponder saturation make uplink power control systems an effective, affordable and easy solution to rain fade in satellite signals.<ref>{{Cite web |title=Uplink power control method and apparatus for satellite communications networks |url=https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Uplink_power_control_method_and_apparatus_for_satellite_communications_networks |access-date=2023-10-27 |website=www.esa.int |language=en}}</ref>