%0 Journal Article
%T A STUDY ON THE DAY LENGTH OF A COMPLICATED SHADING REGION<br>复杂遮蔽区域日照条件的研究
%A Lin Shaojun
%A <br>林少君
%J 地理研究
%D 1989
%I 
%X 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.
%K Day length
%K Shading region
%K Complicated Geography<br>日照条件
%K 遮蔽区域
%K 复杂地型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=C0C75E88BA2EE501C8298896F64A711F&aid=D108EEEAACC12088&yid=1833A6AA51F779C1&iid=CA4FD0336C81A37A&journal_id=1000-0585&journal_name=地理研究&referenced_num=0&reference_num=0