在能源缺乏之下，各國皆開始重視再生能源，極度依賴外國能源進口之台灣更是重視再生能源的發展，也因此政府亦鼓勵太陽能方面的研發。然而只要是太陽能技術的應用，都須使用國內氣象站全日空輻射量的參數，因此國內氣象站所提供的太陽能源數據 (全日空輻射量) 應力求準確。然而氣象站受周遭高樓林立等不可抗力之因素的環境，阻擋了應要接收到的太陽輻射量，因此有低估全日空輻射量的可能。本研究將從此出發，在不移動儀器設備的情況，以環景遮蔭度作為修正指標，修正因環境周遭建築物、路樹或其他儀器所造成低估之現象，把低估的全日空輻射量盡可能彌補回來。根據本研究之測試，澎湖與台東兩站環景遮蔭度分別是11.8 % 與5 %，以此環景遮蔭度作為指標，針對澎湖與台東2個氣象站數據，以空曠環境且與氣象站相距不遠之處為標準件架設之地點進行比對和修正。修正後相對誤差除澎湖馬公氣象站提供的異常數據之外，發現氣象站所量得數據皆有較低之趨勢，台東從2016年有12.75 % 的誤差量並且校正量9.11 %、2017年有13.17 % 的誤差量並且校正量達8.76 %；澎湖2015年有13.03 % 之誤差量並校正3.37 %、2016年有12.63 % 並且校正量達4.28 %、2017年有24.17 % 之誤差量並且校正量達3.6 %。本研究亦就氣象站量測太陽輻射量儀器可能的誤差進行校對與分析。

During the installation of pyranometers at weather stations used to measure global solar radiation, obstacles in the surroundings often cannot be avoided. Investigation of the sheltering effect on the measurement of global solar radiation is performed by introducing a shelter view factor. Evaluation of the shelter view factor is made by means of a fisheye-lens photograph together with the calculation method developed by Steyn (1980).
Taitung Weather Station and Penghu Weather Station are chosen for the study. The shelter view factor for the pyranometer installed at Taitung Weather Station is estimated to be 11.8%, and that for the Penghu Weather Station is estimates to be 5%.
Measurements of global solar radiation are conducted at a place located near the weather stations but under conditions in whitch there is a zero shelter view factor.
It is suggested that there is a need for correction if the sheltering effect in the measurement of global solar radiation at weather stations with the exception of those are not subject to surrounding obstacles in the sky dome.
In this study, as much as a 9.11% correction was found at Taitung Weather Station, and as much as a 4.28% correction was found at Penghu Weather Station.

文獻回顧
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