应用地球椭球模型计算冬至日日照时数

Using the Model of the Earth Ellipsoid Theory to Calculate Hours of Solar in the Winter Solstice

日照是人类不可缺少生产生活的活动和元素,运用地球椭球理论、地球与太阳的运动规律,适用一套数学模型,充分利用空间椭球、椭圆的变换关系,逐步分析地球上任意纬度在冬至日当天的理论日照时数,当然此方法除了春分或秋分及夏至日还可以计算出任意日期任意纬度当天理论日照时数,把一年中每天的日照时数累加起来就可算出当地的年日照时数。

Solar is an indispensable human production activities and life element,Using the earth ellipsoid theory and the movement of the earth and the sun,apply a mathematical model and full use of space ellipsoid,elliptical transform relationships,gradually analyse methods of calculating hours of Solar at any latitude on the earth in the Winter Solstice,and can calculate the date of the Spring Equinox or the Autumnal Equinox and the Summer Solstice as well,Or each other date of a year is useful,So adding all hours of Solar can get total hours of one year Solar.