solar elevation angle

Tracking the solar elevation angle and azimuth angle , drive actuators rotate .

驱动执行机构对太阳高度角和方位角进行跟踪转动，最后总结了跟踪系统误差产生的主要原因，并提出了系统改进方案。

Relationships between global radiation , surface albedo and solar elevation angle for several underlying surfaces in the Heihe experimental area

黑河实验区若干下垫面总辐射、地表反射率与太阳高度角的关系

In this study , we used this model field monitoring in Sanya area , where the solar elevation angle highest value can reach 90 °, to obtain the ocular UV exposure distribution during the day .

在本次研究中，将选用此模型在太阳高度角最高值可达到90°的三亚地区进行实地监测，获得人群眼部紫外线暴露的日间分布规律。

As a large number factors affect ocular UV exposure , including the solar elevation angle , altitude , ground reflection , sky scattering and facial anatomy etc , so individual ocular UV exposure quantification has been severely limited for a long time .

由于眼部紫外线暴露的影响因素较多，包括太阳高度角、海拔、地面反射、天空散射和面部解剖特征等，因此长期以来，个体眼部紫外线暴露的定量一直受到较大的限制。

Established the eye quantitative mathematical model of UV exposure : 2 . In this study , ocular UV exposure through the eye model calculated instantaneous intensity : in the solar elevation angle 40 ° around , the ocular UV exposure is the largest . 3 .

结论1、研究建立了眼部紫外线暴露定量的数学模型：2、本研究通过眼部紫外线暴露瞬间强度数学模型计算得出：在太阳高度角40°左右时，进入眼部紫外线暴露量最大。