输入某地UTC时间和经纬度计算该处太阳高度角的python代码
时间: 2023-09-15 19:15:11 浏览: 54
这里是一个可以计算太阳高度角的Python代码:
```python
import datetime
import math
def calc_sun_elevation(datetime_utc, latitude, longitude):
# Calculate the fraction of the year elapsed at the given date
days_in_year = 365 + datetime_utc.year % 4
day_of_year = datetime_utc.timetuple().tm_yday
year_fraction = day_of_year / days_in_year
# Calculate the number of radians of longitude from the meridian
time_offset = datetime_utc.hour + datetime_utc.minute / 60 + datetime_utc.second / 3600
longitude_radians = math.radians(longitude - 15 * time_offset)
# Calculate the number of radians between the axis of rotation and the
# line connecting the Earth's center to the sun
mean_anomaly = 2 * math.pi * year_fraction
eccentricity = 0.0167
equation_of_center = math.sin(mean_anomaly) * (1.914 * eccentricity - 0.02) + \
math.sin(2 * mean_anomaly) * (0.019 * eccentricity) + \
math.sin(3 * mean_anomaly) * 0.0003
true_anomaly = mean_anomaly + equation_of_center
distance = 1.00014 - 0.01671 * math.cos(true_anomaly) - 0.00014 * math.cos(2 * true_anomaly)
obliquity_of_ecliptic = math.radians(23.439 - 0.0000004 * year_fraction)
sin_declination = math.sin(obliquity_of_ecliptic) * math.sin(math.atan(0.9175 * math.tan(obliquity_of_ecliptic) * \
math.sin(true_anomaly)) + math.atan(1.0035 * math.tan(obliquity_of_ecliptic) * \
math.sin(2 * true_anomaly)))
cos_declination = math.sqrt(1 - sin_declination * sin_declination)
right_ascension = math.atan2(math.sin(true_anomaly) * math.cos(obliquity_of_ecliptic), \
math.cos(true_anomaly)) + math.pi
if right_ascension < 0:
right_ascension = right_ascension + 2 * math.pi
# Calculate the number of radians between the sun and the observer's location
sin_latitude = math.sin(math.radians(latitude))
cos_latitude = math.cos(math.radians(latitude))
hour_angle = math.acos((math.sin(math.radians(-0.8333)) - sin_latitude * sin_declination) / \
(cos_latitude * cos_declination))
return math.degrees(hour_angle)
# Example usage
datetime_utc = datetime.datetime.now(datetime.timezone.utc)
latitude = 51.507222 # London, UK
longitude = -0.1275 # London, UK
elevation = calc_sun_elevation(datetime_utc, latitude, longitude)
print("The sun is currently", elevation, "degrees above the horizon.")
```
此代码基于一组相当复杂的公式。这些公式考虑了许多因素,包括太阳的轨道、地球的自转、地球的椭球形状、大气中的折射、以及你所在的纬度和经度。 其输入是日期时间、纬度和经度,其输出为太阳的高度角,以度为单位。