Study the landform effects on the diffuse irradiation . when integralling the visible vault of heaven, it is necessary to estimate the shadow status on every direction in 2 circle . the slope and aspect are also effective 2、地形因子的影響在對“可見”天穹積分時,對2范圍內各方向上的遮蔽狀況進行判斷,確定每個方向上由前方地勢所造成的遮蔽角度,從而反映周圍地形造成的遮蔽影響,實現對“可見天穹”的積分。
In summaries, we use two parts, isotropic and anisotropic, to describe the anisotropic diffuse-radiation; connected the horizontal diffuse-radiation and the land modulus to calculate the diffuse irradiation on actual terra; and modem geo-tech, dem and pci-geomatica software and so on, is convenient and helpful to deal with mass geo-data and geo-information 總結本文的技術與方法,本文以各向同性與各向異性權重分離方法描述了散射輻射各向異性特征;以平地散射輻射與地形因子結合方式詳細探討了地形因子的作用;以dem數據與現代地理信息軟件相配合,嘗試了高效的現代地理空間信息計算技術。
Attempt to calculate the diffuse irradiation on the actual terra by used of the modern geo-information technology and the high resolution digital elevation model, we focused on 3 points in discussion : 1 . to construct an appropriate model to describe the anisotropic character of the diffuse-radiation . according to the circle-sun suppose, we decomposed it into 2 parts, one is the isotopic part and the other is anisotropic 本文的討論主要著眼于三個方面:1、散射輻射各向異性特點利用環日假設理論,把太陽散射輻射分解為各向同性散射和環日散射兩部分,并以水平地面上的直接輻射和散射輻射各自在總輻射中所占比例來表示其權重,描述實際散射輻射各向異性的特征。