def moon_get_moon_phase(date):
from PyAstronomy import pyasl
import numpy as np
# Convert calendar date to JD
# using the datetime package
jd = date
jd = pyasl.jdcnv(jd)
mp = pyasl.moonphase(jd)
return mp[0]
def moon_get_moon_phase_range(start_date, end_date):
from PyAstronomy import pyasl
import numpy as np
from datetime import datetime
# Convert calendar date to JD
# using the datetime package
jd = start_date
jd = pyasl.jdcnv(jd)
no_of_days = (end_date - start_date).days
jd = np.arange(jd, jd + no_of_days + 1, 1)
mp = pyasl.moonphase(jd)
return mp
def lunar(date, o_slon, o_slat, s_slon, band):
#Here we go...
import math
import datetime
from PyAstronomy import pyasl
#Determine Lunar Phase
#pyasl wants it in days.....
day_date = date / (3600 * 24)
#date in Julian Date days past epoch
mp = pyasl.moonphase(day_date)
#test value from USGS presentation
# mp = 7. * math.pi / (180)
#Lunar model constants
c1 = 0.00034115
c2 = -0.0013425
c3 = 0.00095906
c4 = 0.00066229
p1 = 4.06054 * math.pi / 180
p2 = 12.8802 * math.pi / 180
p3 = -30.5858 * math.pi / 180
p4 = 16.7492 * math.pi / 180
#Read off wave-length-specific coefficients from LIMCOEFF data table
slines = []
with open('LIMCOEFF.txt', 'r') as f:
slines = f.readlines()
for i in range(len(slines)):
slines[i] = slines[i].split()
# print slines[5]
#Which wavelength row
i = band
#Spectral Coefficients, sorry I used lines
wl = float(slines[i][0]) #Wavelength (nm)
a0 = float(slines[i][1]) # 1, Constant
a1 = float(slines[i][2]) # g, Phase 1 (rad^-1)
a2 = float(slines[i][3]) # g2, Phase 2 (rad^-2)
a3 = float(slines[i][4]) # g3, Phase 3 (rad^-3)
b1 = float(slines[i][5]) # Phi, SunLon 1 (rad^-1)
b2 = float(slines[i][6]) # Phi3, SunLon 3 (rad^-3)
b3 = float(slines[i][7]) # Phi5, SunLon 5 (rad^-5)
d1 = float(slines[i][8]) # e^(-g/p1), Exponent 1
d2 = float(slines[i][9]) # e^(-g/p2), Exponent 2
d3 = float(slines[i][10]) # cos[(g-p3)/p4], Exponent 3
#Variables:
#Absolute phase angle
g = mp
#Selenographic latitude of sub-observer point, degs to rads
theta = o_slat * math.pi / (180)
#Selenographic longitude of sub-observer point, degs to rads
phi = o_slon * math.pi / (180)
#Selenographic longitude of the Sun, degs to rads
PHI = s_slon * math.pi / (180)
def diskequiv(C1, C2, C3, C4, P1, P2, P3, P4, WL, A0, A1, A2, A3, B1, B2,
B3, D1, D2, D3, G, THETA, PHi, SUNPHI):
asum = A0 + A1 * G + A2 * (G**2) + A3 * (G**3)
bsum = B1 * SUNPHI + B2 * (SUNPHI**3) + B3 * (SUNPHI**5)
csum = (C1 * THETA + C2 * PHi + C3 * SUNPHI * THETA +
C4 * SUNPHI * PHi)
dsum = (D1 * math.exp(-G / P1) + D2 * math.exp(-G / P2) +
D3 * math.cos((G - P3) / P4))
return float(asum + bsum + csum + dsum)
Ak = diskequiv(c1, c2, c3, c4, p1, p2, p3, p4, wl, a0, a1, a2, a3, b1, b2,
b3, d1, d2, d3, g, theta, phi, PHI)
print('Wavelength: ', wl, '\nReflectance: ', math.exp(Ak))
return [wl, math.exp(Ak)]
def compute_moon_phase(date):
julian_date = date.jd
return pyasl.moonphase(julian_date)