摘要
本文提出,利用遮蔽区域中二个测点的同步遮蔽角和方位角资料,就可计算出所测区域中任意一点的遮蔽角和方位角序列,并清除了经纬仪高度对遮蔽角的影响。配合太阳视运动轨迹,用图解法或数值计算法即可求出相应点的实际日出、日落时间和可照时数。
A measuring method was proposed to calculate the sequences of shielding angle and azimuth of any point in the shading region, and to eliminate the measuring error of shielding angle caused by the theodolite height, by using the synchronous data of shielding angle and azimuth of two points in the area. Therefore,it is possible to obtain the sunrise time and the day length of any point in the shading region graphically or numerically , with the apparent motion locus of the sun and the above calculation of the corresponding point.
出处
《地理研究》
CSSCI
CSCD
北大核心
1989年第1期66-71,共6页
Geographical Research
关键词
日照
遮蔽
地型
Day length, Shading region, Complicated Geography
