def test_on_mills():
mills=959804082*1e3
j2k_ott = marstime.j2000_offset_tt(marstime.julian_tt(marstime.julian(mills)))
assert within_error(j2k_ott, 151.344, 0.001)
ls = marstime.Mars_Ls(j2k_ott)
cy = marstime.Clancy_Year(j2k_ott)
my = marstime.Mars_Year(j2k_ott)
assert within_error(ls, 0.0352, 0.001)
assert within_error(cy, 24, 0.5)
assert within_error(my, 25, 0.5)
def test_math_vs_numpy():
try:
import numpy as np
use_numpy=True
except:
use_numpy=False
if use_numpy:
mil = 1073137591000
jdut = marstime.julian(mil)
marstime.use_numpy = False
tt_math = marstime.utc_to_tt_offset(jdut)
marstime.use_numpy = True
tt_numpy = marstime.utc_to_tt_offset(jdut)
assert within_error(tt_math,tt_numpy,1e-3)
j2k = marstime.j2000_offset_tt(marstime.julian_tt(jdut))
marstime.use_numpy = False
mym = marstime.Mars_Year(j2k)
marstime.use_numpy = True
myn = marstime.Mars_Year(j2k)
assert within_error(mym,myn,0.5)
#----
mil=0
jdut = marstime.julian(mil)
marstime.use_numpy = False
tt_math = marstime.utc_to_tt_offset(jdut)
marstime.use_numpy = True
tt_numpy = marstime.utc_to_tt_offset(jdut)
assert within_error(tt_math,tt_numpy,1e-4)
j2k = marstime.j2000_offset_tt(marstime.julian_tt(jdut))
marstime.use_numpy = False
mym = marstime.Mars_Year(j2k)
marstime.use_numpy = True
myn = marstime.Mars_Year(j2k)
assert within_error(mym,myn,0.5)
def test_julian_tt():
assert marstime.julian_tt() > 2456203.
assert marstime.julian_tt(0) == 0
v = marstime.julian_tt(marstime.j2000_epoch())-marstime.j2000_epoch()
assert (v>64.183/86400.)&(v<64.185/86400.)
def test_spirit_landing():
mil = 1073137591000
longitude=184.702
latitude=-14.460
jdut = marstime.julian(mil)
assert within_error(jdut,2453008.07397,1e-3)
tt_utc = marstime.utc_to_tt_offset(jdut)
assert within_error(tt_utc,64.184,1e-3)
jday_tt = marstime.julian_tt(jdut)
assert within_error(jday_tt, 2453008.07471,1e-3)
j2000_ott = marstime.j2000_offset_tt(jday_tt)
assert within_error(j2000_ott, 1463.07471, 1e-3)
m = marstime.Mars_Mean_Anomaly(j2000_ott)
assert within_error(m, 66.06851,1e3)
alpha = marstime.FMS_Angle(j2000_ott)
assert within_error(alpha, 317.09363,1e-4)
pbs = marstime.alpha_perturbs(j2000_ott)
assert within_error(pbs, 0.01614, 1e-3)
v_m = marstime.equation_of_center(j2000_ott)
assert within_error(v_m, 10.22959, 1e-4)
ls = marstime.Mars_Ls(j2000_ott)
assert within_error(ls, 327.32322, 1e-4)
eot = marstime.equation_of_time(j2000_ott)
assert within_error(eot, -12.77557, 1e-4)
mtc = marstime.Coordinated_Mars_Time(j2000_ott)
assert within_error(mtc,13.16542, 1e-4)
lmst = marstime.Local_Mean_Solar_Time(longitude,j2000_ott)
assert within_error(lmst, 0.85196, 1e-4)
ltst = marstime.Local_True_Solar_Time(longitude,j2000_ott)
assert within_error(ltst, 0.00025, 1e-5)
subsol = marstime.subsolar_longitude(j2000_ott)
assert within_error(subsol, 4.70575,1e-4)
dec = marstime.solar_declination(ls)
assert within_error(dec, -13.42105,1e-2)
rm = marstime.heliocentric_distance(j2000_ott)
assert within_error(rm,1.47767, 1e-4)
im = marstime.heliocentric_longitude(j2000_ott)
assert within_error(im, 52.37469, 1e-4)
bm = marstime.heliocentric_latitude(j2000_ott)
assert within_error(bm, 0.08962, 1e-4)
#This is where we deviate significantly from the original marstime algorithm.
sz = marstime.solar_zenith(longitude, latitude,j2000_ott)
assert within_error(sz, 151.93895, 0.2)
sa = marstime.solar_azimuth(longitude, latitude,j2000_ott)
assert within_error(sa, 179.99225,1e-2)
def test_midnight_crossing():
mil = 947116800000
longitude=0.
latitude=0.
jdut = marstime.julian(mil)
assert within_error(jdut,2451549.5,1e-3)
tt_utc = marstime.utc_to_tt_offset(jdut)
assert within_error(tt_utc,64.184,1e-3)
jday_tt = marstime.julian_tt(jdut)
assert within_error(jday_tt, 2451549.50074,1e-3)
j2000_ott = marstime.j2000_offset_tt(jday_tt)
assert within_error(j2000_ott, 4.50074, 1e-3)
m = marstime.Mars_Mean_Anomaly(j2000_ott)
assert within_error(m, 21.74548,1e3)
alpha = marstime.FMS_Angle(j2000_ott)
assert within_error(alpha, 272.74486,1e-4)
pbs = marstime.alpha_perturbs(j2000_ott)
assert within_error(pbs, 0.00142, 1e-3)
v_m = marstime.equation_of_center(j2000_ott)
assert within_error(v_m, 4.44191, 1e-4)
ls = marstime.Mars_Ls(j2000_ott)
assert within_error(ls, 277.18677, 1e-4)
eot = marstime.equation_of_time(j2000_ott)
assert within_error(eot, -5.18764, 1e-4)
mtc = marstime.Coordinated_Mars_Time(j2000_ott)
assert within_error(mtc,23.99431, 1e-4)
lmst = marstime.Local_Mean_Solar_Time(longitude,j2000_ott)
assert within_error(lmst, 23.99431, 1e-4)
ltst = marstime.Local_True_Solar_Time(longitude,j2000_ott)
assert within_error(ltst, 23.64847, 1e-4)
subsol = marstime.subsolar_longitude(j2000_ott)
assert within_error(subsol, 174.72703,1e-4)
dec = marstime.solar_declination(ls)
assert within_error(dec, -25.22838,1e-4)
rm = marstime.heliocentric_distance(j2000_ott)
assert within_error(rm, 1.39358, 1e-4)
im = marstime.heliocentric_longitude(j2000_ott)
assert within_error(im, 2.26270, 1e-4)
bm = marstime.heliocentric_latitude(j2000_ott)
assert within_error(bm, -1.35959, 1e-4)
sz = marstime.solar_zenith(longitude, latitude,j2000_ott)
assert within_error(sz, 154.26182, 1e-4)
sa = marstime.solar_azimuth(longitude, latitude,j2000_ott)
assert within_error(sa, 191.03687,1e-4)