位於北半球的台灣於春分或秋分時(當晝夜平分時),約有七到十天的時間,太陽、衛星、接收天線三者的位置在某時段恰好成一直線,於是該時段衛星接收天線便會同時收到衛星訊號及來自太陽的電磁波。由於來自太陽的電磁波功率遠高於衛星訊號,所以衛星訊號會被太陽電磁波所干擾掩蓋而導致接收不良甚至完全中斷。
干擾時間每次約在1到5分鐘之間不等(視衛星軌道而定),同一頻道每日會發生二次,每日訊號干擾的時間會發生在大約相同的時間,屆時會導致畫面不清楚或斷訊。日凌干擾一次只會發生在一顆衛星上,所以並不是所有的頻道都會受到影響。不是以衛星提供訊號來源的頻道則不會受到影響。
目前以衛星提供訊號來源頻道的有:GTV系列、三立系列、HBO系列、國家地理頻道系列、衛視系列。
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