noaa日出日落算法
时间: 2023-12-19 19:32:43 浏览: 252
以下是使用NOAA日出日落算法计算日出和日落时间的示例代码:
```python
import datetime
import math
def calculate_julian_day(year, month, day):
if month <= 2:
year -= 1
month += 12
A = math.floor(year / 100)
B = 2 - A + math.floor(A / 4)
julian_day = math.floor(365.25 * (year + 4716)) + math.floor(30.6001 * (month + 1)) + day + B - 1524.5
return julian_day
def calculate_sunrise_sunset(latitude, longitude, date):
julian_day = calculate_julian_day(date.year, date.month, date.day)
n = julian_day - 2451545.0 + 0.0008
Jc = n / 36525.0
Jd = 2451545.0 + 0.0009 + Jc
M = (357.5291 + 0.98560028 * (Jd - 2451545.0)) % 360
L = (280.46646 + 0.98564736 * (Jd - 2451545.0)) % 360
ec = 0.016708634 - 0.000042037 * Jc
C = (1.914602 - 0.004817 * Jc - 0.000014 * Jc**2) * math.sin(math.radians(M)) + (0.019993 - 0.000101 * Jc) * math.sin(math.radians(2 * M)) + 0.000289 * math.sin(math.radians(3 * M))
true_longitude = L + C
omega = 125.04 - 1934.136 * Jc
lambda_sun = true_longitude - 0.00569 - 0.00478 * math.sin(math.radians(omega))
epsilon = 23.439291 - 0.0130042 * Jc
sin_alpha = math.cos(math.radians(epsilon)) * math.sin(math.radians(lambda_sun))
cos_alpha = math.sqrt(1 - sin_alpha**2)
alpha = math.degrees(math.atan2(sin_alpha, cos_alpha))
hour_angle = math.degrees(math.acos((math.sin(math.radians(-0.83)) - math.sin(math.radians(latitude)) * math.sin(math.radians(alpha))) / (math.cos(math.radians(latitude)) * math.cos(math.radians(alpha)))))
Jtransit = 2451545.0 + 0.0009 + ((hour_angle + longitude) / 360.0) + n
delta_Jtransit = Jtransit - math.floor(Jtransit)
Jset = Jtransit + (0.0053 * math.sin(math.radians(omega))) - (0.0069 * math.sin(2 * math.radians(lambda_sun)))
delta_Jset = Jset - math.floor(Jset)
Jrise = Jtransit - delta_Jtransit
Jrise_next = Jrise + 1.0
sunrise_time = datetime.datetime.utcfromtimestamp((Jrise - 2451545.0) * 86400.0)
sunset_time = datetime.datetime.utcfromtimestamp((Jset - 2451545.0) * 86400.0)
return sunrise_time, sunset_time
# 示例使用
latitude = 37.7749 # 纬度
longitude = -122.4194 # 经度
date = datetime.datetime(2022, 1, 1) # 日期
sunrise, sunset = calculate_sunrise_sunset(latitude, longitude, date)
print("日出时间:", sunrise)
print("日落时间:", sunset)
```