Mean solar spectral irradiance of satellite is an important parameter for the computation of appearance reflectance.

卫星图像波段平均太阳辐照度是计算表观反射率的重要参数。

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The International Meridien Conference of 1884 established Greenwich Mean Time, referring to the mean solar time at the Royal Observatory in Greenwich, near London.

1884年，国际子午线大会确立了格林威治标准时间（GMT），即伦敦附近的格林威治皇家气象台（the Royal Observatory in Greenwich）的平均太阳时间。

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Greenwich mean time (GMT) is mean solar time at the Royal Greenwich Observatory in Greenwich, London, England, which by convention is at 0 degrees geographic longitude.

格林尼治国际标准以英国伦敦格林威治皇家天文台为准，也就是零经度为准。

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The costs of buying new equipment mean solar energy is still more expensive than energy generated from fossil fuels.

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It would also mean that large scale solar farms, like the giant array in Alentejo, Portugal, could increase their output while saving on energy used to track the sun.

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In the mean time, silicon solar manufacturers, from silicon producers to those who take the silicon and turn it into cells and then panels, have built many more giant factories.

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