太阳高度角

结果表明，森林的反射率与太阳高度角有关，在太阳高度角很小的日出和日落附近反射率较高，太阳高度角大于30°时反射率变化不大，反射率的日变化曲线为U形。

The results showed that : the reflectivity of the forest was related to solar altitude . It was generally high just after sunrise or before sunset , but was relatively stable as solar altitude was higher than 30 ° . The diurnal curves of reflectivity took U shape .

太阳高度角决定了消光系数的日变化过程，而生长季内消光系数的变化主要由叶面积指数的不断变化而引起；

The solar altitude decided the changes of instantaneous extinction coefficient and leaf area index effected the changes of the daily extinction coefficient .

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。

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

谈太阳高度角在处理建筑纠纷中的应用

Discusses on the Application of Solar Altitudinal Angle in Processing Construction Ent angle mant

地形对重庆天文辐射的分布影响显著，特别是太阳高度角较小的冬季。

The influence of terrain on extra radiation was very strong , especially in winter .

而太阳高度角较低时此值的变化，主要由仪器的余弦响应所引起。

The variation at the lower solar elevation is caused by the cosine response of the instrument .

光强的时间变化受冠层条件和太阳高度角的双重影响。

The changes in light intensity with time were affected by the condition of canopy structure and solar movement .

湖北省四湖地区冬春季气候特点是：冬季太阳高度角较北方高，日照时数较北方少；

In winter , the solar height angle is higher than north and sunshine time is shorter than north .

研究表明对果树冠层光合影响最大的因子是太阳高度角和果树的冠层结构。

Research proved that the most important factors are the elevation angle of the sun and the structure of canopy .

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

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

云和太阳高度角控制着UV－B辐射通量日变化过程。

Daily variations of UV B radiation are greatly controlled by the solar zenith angle ( SZA ), ozone and the sky conditions .

该方式比用太阳高度角在时间上的敏感程度要小，因而降低了对时间的要求，尤其对单片航空摄影测量中物体高度计算更有利。

Thus our proposed method lowers the demand on time , and is more favorable for calculating object height in mono-photo aerial photogrammetry .

据此，建立了内蒙古荒漠草原晴天地表反照率随太阳高度角与土壤含水量变化的双因子参数化方案。

Considering the effects of solar altitude angle and soil water content , a two-factor parameterization formula of surface albedo was developed preliminarily .

通过比较分析证明，季节变化对光导管的光传输量的影响很大，太阳高度角于室内照度分布的影响也很大。

Through measuring lighting performance of the light-pipe on three typical weathers in summer , the luminous flux and indoor illumination distribution have been obtained .

晴天地表反照率与太阳高度角呈指数关系，与土壤含水量呈指数或线性关系，两者共同解释了地表反照率变化的68%左右。

The surface albedo had a typical exponential relationship with solar altitude angle . The linear or exponential relationship existed between surface albedo and soil water content .

本文通过一系列试验，对比分析了辐射校正中的地形效应校正算法，太阳高度角校正算法，基于传输模型的大气校正算法和相对辐射校正算法。

Some algorithms for correction of terrain effect , sun elevation and atmosphere based on transmission model and radiometric normalization algorithm were analyzed and compared through a series of experiments .

晴天地表反照率随太阳高度角的增大而减小，当太阳高度角大于40°时，地表反照率趋于稳定。

On sunny days , the surface albedo decreased with the increase of solar altitude angle , and it almost became a constant when solar altitude angle was more than 40 ° .

本文根据地面反射率变化的原因，将其分解为自身变化、随机变化和随太阳高度角变化三种形式。

Based on the physical cases of the surface albedo variation it could be divided into 3 types , i.e. self - , random variations and the variation with the sun 's altitude .

而在太阳高度角较高的夏季，天文辐射空间差异较小，7月份不同地形极端天文辐射的差异仅在16%左右；

The spatial differences of ASR are relatively small in summer where a higher sun elevation angle exists and the extreme difference of ASR for different terrains is only 16 % in July ;

根据影响遥感时相选择的平台、太阳高度角和代表光谱等因素，针对四川不同地区森林植被遥感识别的特点，按照5个区域提出了四川森林植被遥感识别的最佳时期。

On the basis of on the characteristic of phonological calendars of forest vegetation and in accordance with the five regions , the optimum phase for forest vegetation is suggested in Sichuan province .

天气条件、叶片湿度、仪器高度、太阳高度角和小麦品种对光谱测量影响较大。

The factors including weather condition , leaf wetness , the sensor height , the sun angle and the wheat variety affect the quality and quantity of sunlight reflected from wheat canopies hugely .

山区土地覆盖分类经常受到地形效应及太阳高度角的影响，使用纯粹的基于光谱特征的分类方法很难取得较高的分类精度。

Classification of mountainous land cover often affected by the differences of topographic effect and height angle of sun , and it is difficult to achieve high accuracy of classification using spectral feature classifier .

显示了林窗边缘壁面的热力效应除与太阳高度角、太阳辐射的时间长短和强度有关之外，林窗边缘树木高度也是不可忽视的因子。

This indicates that , besides solar angle , time and intensity of radiation , the height of trees is also an important factor that influences thermal effects of vertical thermal active surface of edges .

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。

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 .

8月晴朗天气多，太阳高度角大，地形遮蔽作用小，实照时间较当地开阔地形站减少35%～63%；

In July and August the sunny weather is much , the angle of sun height is large , the influence of terrain shield is small , real sunshine hours reduced 35 % - 63 % ;

当沙漠上空光学厚度为1.0，海洋上空光学厚度为0.3时，取春季平均太阳高度角，沙尘层对应的净辐射加热率分别为2.8K/d和0.4K/d。

The heating rate is 2.8 K / d over China 's desert and 0.4 K / d over the Pacific region corresponding to the optical depth of dust aerosol of 1.0 and 0.3 with spring averaged solar altitude .

根据太阳高度角公式，地球自转原理，利用立体几何知识求算出楼房高度与最低日照要求下的间距比值，从而为解决建筑采光纠纷提供技术数据。

According to the solar altitudinal angle formula , earth rotation principle , ratio of building height and spacing meet minimum sunshine can be calculated by using solid geometry knowledge , technical data can be provided for solving construction daylighting entanglemant .

林窗中央的总辐射日总量在雨季太阳高度角最大时最高，雨季后期和干热季其次，雾凉季时最小；

The total daily gross solar radiation at the center was the maximum when the solar angle was the biggest in rain season , higher in later rain season and dry hot season , and was the minimum in fog cool season .

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。

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 .

在群体封行之前，依据太阳高度角的变化，将白昼分为5个照光时段，然后分别计算逐时与逐日的光合量。

In early and middle stages of rice growth ( before the complete cover ), the photosynthate at the hourly and daily levels were computed in 5 successive stages in the day time , which were divided according to elevation angle of the sun .