Azimuth is measured in degrees clockwise from north.
Elevation is measured in degrees up from the horizon.
Az & El both report dark after astronomical twilight.
The calculations in the NOAA Sunrise/Sunset and Solar Position Calculators are based on equations from Astronomical Algorithms,
by Jean Meeus. The sunrise and sunset results have been verified to be
accurate to within a minute for locations between 72° latitude, and
within 10 minutes outside of those latitudes.
而南北緯72度-90度會有誤差
Note that for latitudes greater than 72° north or less than 72° south, accuracy may be lower due in part to the effects of atmospheric refraction.
1.擇日用事首先要校正磁偏角，簡言之，羅盤測定之地平座標刻度是「磁北」，而不是正北。例如以台南市為例，西元2007年之磁偏角約為向西偏3度，故太陽到山擇日，需先用羅盤測定之地平座標刻度加減磁偏角才能求得真正與太陽的相對方位關係。若各位有研究占星很快地可以從占星軟件動態報表找到你所求的行星方位角。
2.一般易友只求太陽到山，個人認為金星到山到向，木星到山到向理論上應也有其吉利效應。若能再配合占星的用事星、用事宮更佳。
3.太陽到山在「地理鉛彈子」中為「一日一時法」，各位可以參看。
4.各位易友若有solar fire 6.0軟體，可在幾分鐘內求得各位所要的太陽到山時刻。該軟件已內建自動校正真太陽時，有空小弟用鍾義明先生「擇日天星實務」一書的案例，用solar fire 的報表呈現給各位易友看。
５．路過台南永康可以來我服務的地方，我會與各位交流。hongjhy@dc2es.tnc.edu.tw
发表于 2007-10-26 06:53:45
发表于 2007-10-26 07:53:51
楼主
厉害，资料这么齐全
