"The methodology is available on the internet. It only requires inputs related to the latitude and altitude of the station, making it easy to compute. If you need it, I have it in a Python script that I can share. :)

Viera Rattayova It would be great! Thank you.

import math

def calculate_RA(day_of_year, latitude):

# Constants

Gsc = 0.0820 # Solar constant [MJ m^-2 min^-1]

pi = math.pi

# Convert latitude to radians

phi = latitude * (pi / 180)

# Calculate dr

dr = 1 + 0.033 * math.cos(2 * pi * day_of_year / 365)

# Calculate delta

delta = 0.409 * math.sin(2 * pi * day_of_year / 365 - 1.39)

# Calculate omega_s

omega_s = math.acos(-math.tan(phi) * math.tan(delta))

# Calculate RA

RA = (24 * 60 / pi) * Gsc * dr * (

omega_s * math.sin(phi) * math.sin(delta) +

math.cos(phi) * math.cos(delta) * math.sin(omega_s)

)

return RA

# Example usage

day_of_year = 200 # July 19th

latitude = 30.0 # 30 degrees

RA = calculate_RA(day_of_year, latitude)

print(f"Extraterrestrial Solar Radiation (RA): {RA:.2f} MJ/m²/day")

##This code will calculate RA for the given day of the year and latitude. You can modify the day_of_year and latitude variables for different scenarios.

I use software and research the location area,Sorry to reply now