def test_6s_example1(self):
# Implements Example_In_1.txt from the 6S distribution in Py6S
# Tests against manual run of that file
s = SixS()
s.geometry = Geometry.User()
s.geometry.solar_z = 40
s.geometry.solar_a = 100
s.geometry.view_z = 45
s.geometry.view_a = 50
s.geometry.month = 7
s.geometry.day = 23
s.atmos_profile = AtmosProfile.UserWaterAndOzone(3.0, 3.5)
s.aero_profile = AeroProfile.User(dust=0.25,
water=0.25,
oceanic=0.25,
soot=0.25)
s.aot550 = 0.5
s.altitudes.set_target_custom_altitude(0.2)
s.altitudes.set_sensor_custom_altitude(3.3, aot=0.25)
s.wavelength = Wavelength(PredefinedWavelengths.AVHRR_NOAA9_B1)
s.ground_reflectance = GroundReflectance.HeterogeneousLambertian(
0.5, GroundReflectance.ClearWater,
GroundReflectance.GreenVegetation)
s.atmos_corr = AtmosCorr.AtmosCorrBRDFFromReflectance(0.1)
s.run()
self.assertAlmostEqual(s.outputs.apparent_radiance,
12.749,
delta=0.002)
def __init__(self,
bandnums,
wavelengths,
geometry,
date_time,
sensor=None):
""" Run SixS atmospheric model using Py6S """
start = datetime.datetime.now()
VerboseOut('Running atmospheric model (6S)', 2)
s = SixS()
# Geometry
s.geometry = Geometry.User()
s.geometry.from_time_and_location(geometry['lat'], geometry['lon'],
str(date_time), geometry['zenith'],
geometry['azimuth'])
s.altitudes = Altitudes()
s.altitudes.set_target_sea_level()
s.altitudes.set_sensor_satellite_level()
doy = (date_time - datetime.datetime(date_time.year, 1, 1)).days + 1
# Atmospheric profile
s.atmos_profile = atmospheric_model(doy, geometry['lat'])
# Aerosols
# TODO - dynamically adjust AeroProfile?
s.aero_profile = AeroProfile.PredefinedType(AeroProfile.Continental)
self.aod = aodData.get_aod(geometry['lat'], geometry['lon'],
date_time.date())
s.aot550 = self.aod[1]
# Other settings
s.ground_reflectance = GroundReflectance.HomogeneousLambertian(
GroundReflectance.GreenVegetation)
s.atmos_corr = AtmosCorr.AtmosCorrLambertianFromRadiance(1.0)
# Used for testing
try:
stdout = sys.stdout
funcs = {
'LT5': SixSHelpers.Wavelengths.run_landsat_tm,
'LT7': SixSHelpers.Wavelengths.run_landsat_etm,
# LC8 doesn't seem to work
#'LC8': SixSHelpers.Wavelengths.run_landsat_oli
}
if sensor in funcs.keys():
sys.stdout = open(os.devnull, 'w')
wvlens, outputs = funcs[sensor](s)
sys.stdout = stdout
else:
# Use wavelengths
outputs = []
for wv in wavelengths:
s.wavelength = Wavelength(wv[0], wv[1])
s.run()
outputs.append(s.outputs)
except Exception, e:
sys.stdout = stdout
raise AtmCorrException("Error running 6S: %s" % e)
def __init__(self, bandnums, wavelengths, geometry, date_time, sensor=None):
""" Run SixS atmospheric model using Py6S """
start = datetime.datetime.now()
verbose_out('Running atmospheric model (6S)', 2)
s = SixS()
# Geometry
s.geometry = Geometry.User()
s.geometry.from_time_and_location(geometry['lat'], geometry['lon'], str(date_time),
geometry['zenith'], geometry['azimuth'])
s.altitudes = Altitudes()
s.altitudes.set_target_sea_level()
s.altitudes.set_sensor_satellite_level()
doy = (date_time - datetime.datetime(date_time.year, 1, 1)).days + 1
# Atmospheric profile
s.atmos_profile = atmospheric_model(doy, geometry['lat'])
# Aerosols
# TODO - dynamically adjust AeroProfile?
s.aero_profile = AeroProfile.PredefinedType(AeroProfile.Continental)
self.aod = aodData.get_aod(
geometry['lat'], geometry['lon'], date_time.date()
)
# sixs throws IEEE_UNDERFLOW_FLAG IEEE_DENORMAL for small aod.
# and if using a predefined AeroProfile, visible or aot550 must be
# specified. Small here was determined emprically on my laptop, and
# visible = 1000 km is essentially setting the visibility to infinite.
if self.aod[1] < 0.0103:
s.visible = 1000
else:
s.aot550 = self.aod[1]
# Other settings
s.ground_reflectance = GroundReflectance.HomogeneousLambertian(GroundReflectance.GreenVegetation)
s.atmos_corr = AtmosCorr.AtmosCorrLambertianFromRadiance(1.0)
# Used for testing
funcs = {
'LT5': SixSHelpers.Wavelengths.run_landsat_tm,
'LT7': SixSHelpers.Wavelengths.run_landsat_etm,
# LC8 doesn't seem to work
#'LC8': SixSHelpers.Wavelengths.run_landsat_oli
}
if sensor in funcs.keys():
saved_stdout = sys.stdout
try:
sys.stdout = open(os.devnull, 'w')
wvlens, outputs = funcs[sensor](s)
finally:
sys.stdout = saved_stdout
else:
# Use wavelengths
outputs = []
for wv in wavelengths:
s.wavelength = Wavelength(wv[0], wv[1])
s.run()
outputs.append(s.outputs)
self.results = {}
verbose_out("{:>6} {:>8}{:>8}{:>8}".format('Band', 'T', 'Lu', 'Ld'), 4)
for b, out in enumerate(outputs):
t = out.trans['global_gas'].upward
Lu = out.atmospheric_intrinsic_radiance
Ld = (out.direct_solar_irradiance + out.diffuse_solar_irradiance + out.environmental_irradiance) / numpy.pi
self.results[bandnums[b]] = [t, Lu, Ld]
verbose_out("{:>6}: {:>8.3f}{:>8.2f}{:>8.2f}".format(bandnums[b], t, Lu, Ld), 4)
verbose_out('Ran atmospheric model in %s' % str(datetime.datetime.now() - start), 2)
def test_usgs_spectra_from_file(self):
s = SixS()
s.ground_reflectance = GroundReflectance.HomogeneousLambertian(
Spectra.import_from_usgs(
os.path.join(test_dir, "butlerite_gds25.3947.asc")))
s.run()
self.assertAlmostEqual(s.outputs.apparent_radiance,
180.818,
delta=0.002)
def __init__(self, bandnums, wavelengths, geometry, date_time, sensor=None):
""" Run SixS atmospheric model using Py6S """
start = datetime.datetime.now()
VerboseOut('Running atmospheric model (6S)', 2)
s = SixS()
# Geometry
s.geometry = Geometry.User()
s.geometry.from_time_and_location(geometry['lat'], geometry['lon'], str(date_time),
geometry['zenith'], geometry['azimuth'])
s.altitudes = Altitudes()
s.altitudes.set_target_sea_level()
s.altitudes.set_sensor_satellite_level()
doy = (date_time - datetime.datetime(date_time.year, 1, 1)).days + 1
# Atmospheric profile
s.atmos_profile = atmospheric_model(doy, geometry['lat'])
# Aerosols
# TODO - dynamically adjust AeroProfile?
s.aero_profile = AeroProfile.PredefinedType(AeroProfile.Continental)
self.aod = aodData.get_aod(geometry['lat'], geometry['lon'], date_time.date())
s.aot550 = self.aod[1]
# Other settings
s.ground_reflectance = GroundReflectance.HomogeneousLambertian(GroundReflectance.GreenVegetation)
s.atmos_corr = AtmosCorr.AtmosCorrLambertianFromRadiance(1.0)
# Used for testing
try:
stdout = sys.stdout
funcs = {
'LT5': SixSHelpers.Wavelengths.run_landsat_tm,
'LT7': SixSHelpers.Wavelengths.run_landsat_etm,
# LC8 doesn't seem to work
#'LC8': SixSHelpers.Wavelengths.run_landsat_oli
}
if sensor in funcs.keys():
sys.stdout = open(os.devnull, 'w')
wvlens, outputs = funcs[sensor](s)
sys.stdout = stdout
else:
# Use wavelengths
outputs = []
for wv in wavelengths:
s.wavelength = Wavelength(wv[0], wv[1])
s.run()
outputs.append(s.outputs)
except Exception, e:
sys.stdout = stdout
raise AtmCorrException("Error running 6S: %s" % e)
def test_aster_spectra_from_file(self):
s = SixS()
s.altitudes.set_target_sea_level()
s.altitudes.set_sensor_satellite_level()
s.ground_reflectance = GroundReflectance.HomogeneousLambertian(
Spectra.import_from_aster(
os.path.join(
test_dir,
"jhu.becknic.vegetation.trees.conifers.solid.conifer.spectrum.txt",
)))
s.run()
self.assertAlmostEqual(s.outputs.apparent_reflectance,
0.1403693,
delta=0.002)
def test_hetero_ground_reflectance(self):
s = SixS()
s.altitudes.set_sensor_satellite_level()
s.altitudes.set_target_sea_level()
s.wavelength = Wavelength(PredefinedWavelengths.LANDSAT_ETM_B2)
wavelengths = np.arange(0.5, 0.6, 0.025)
ro_target = np.array([wavelengths, [1.0] * 4]).T
ro_env = np.array([wavelengths, [0.5] * 4]).T
s.ground_reflectance = GroundReflectance.HeterogeneousLambertian(
0.3, ro_target, ro_env)
s.run()
self.assertAlmostEqual(s.outputs.apparent_radiance,
271.377,
delta=0.002)
def test_6s_example2(self):
# Implements Example_In_2.txt from the 6S distribution in Py6S
# Tests against manual run of that file
s = SixS()
s.geometry = Geometry.User()
s.geometry.solar_z = 0
s.geometry.solar_a = 20
s.geometry.view_z = 30
s.geometry.view_a = 0
s.geometry.month = 8
s.geometry.day = 22
s.atmos_profile = AtmosProfile.PredefinedType(
AtmosProfile.NoGaseousAbsorption)
s.aero_profile = AeroProfile.SunPhotometerDistribution(
[
0.050000001,
0.065604001,
0.086076997,
0.112939,
0.148184001,
0.194428995,
0.255104989,
0.334715992,
0.439173013,
0.576227009,
0.756052017,
0.99199599,
1.30157101,
1.707757,
2.24070191,
2.93996596,
3.85745192,
5.06126022,
6.64074516,
8.71314526,
11.4322901,
15,
],
[
0.001338098,
0.007492487,
0.026454749,
0.058904506,
0.082712278,
0.073251031,
0.040950641,
0.014576218,
0.003672085,
0.001576356,
0.002422644,
0.004472982,
0.007452302,
0.011037065,
0.014523974,
0.016981738,
0.017641816,
0.016284294,
0.01335547,
0.009732267,
0.006301342,
0.003625077,
],
[1.47] * 20,
[0.0093] * 20,
)
s.aot550 = 1.0
s.altitudes.set_target_sea_level()
s.altitudes.set_sensor_satellite_level()
s.wavelength = Wavelength(0.550)
s.ground_reflectance = GroundReflectance.HomogeneousRoujean(
0.037, 0.0, 0.133)
s.run()
self.assertAlmostEqual(s.outputs.apparent_radiance,
76.999,
delta=0.002)
self.assertAlmostEqual(s.outputs.background_radiance,
10.017,
delta=0.002)
def test_6s_example4(self):
s = SixS()
s.geometry = Geometry.User()
s.geometry.solar_z = 61.23
s.geometry.solar_a = 18.78
s.geometry.solar_a = 0
s.geometry.view_z = 18.78
s.geometry.view_a = 159.2
s.geometry.month = 4
s.geometry.day = 30
s.atmos_profile = AtmosProfile.UserWaterAndOzone(0.29, 0.41)
s.aero_profile = AeroProfile.PredefinedType(AeroProfile.Continental)
s.aot550 = 0.14
s.altitudes.set_target_sea_level()
s.altitudes.set_sensor_satellite_level()
s.wavelength = Wavelength(PredefinedWavelengths.AVHRR_NOAA11_B1)
s.ground_reflectance = GroundReflectance.HomogeneousLambertian([
0.827,
0.828,
0.828,
0.827,
0.827,
0.827,
0.827,
0.826,
0.826,
0.826,
0.826,
0.825,
0.826,
0.826,
0.827,
0.827,
0.827,
0.827,
0.828,
0.828,
0.828,
0.829,
0.829,
0.828,
0.826,
0.826,
0.825,
0.826,
0.826,
0.826,
0.827,
0.827,
0.827,
0.826,
0.825,
0.826,
0.828,
0.829,
0.830,
0.831,
0.833,
0.834,
0.835,
0.836,
0.836,
0.837,
0.838,
0.838,
0.837,
0.836,
0.837,
0.837,
0.837,
0.840,
0.839,
0.840,
0.840,
0.841,
0.841,
0.841,
0.841,
0.842,
0.842,
0.842,
0.842,
0.843,
0.842,
0.843,
0.843,
0.843,
0.843,
0.843,
0.843,
0.841,
0.841,
0.842,
0.842,
0.842,
0.842,
0.842,
0.841,
0.840,
0.841,
0.838,
0.839,
0.837,
0.837,
0.836,
0.832,
0.832,
0.830,
0.829,
0.826,
0.826,
0.824,
0.821,
0.821,
0.818,
0.815,
0.813,
0.812,
0.811,
0.810,
0.808,
0.807,
0.807,
0.812,
0.808,
0.806,
0.807,
0.807,
0.807,
0.807,
])
s.run()
self.assertAlmostEqual(s.outputs.apparent_radiance,
170.771,
delta=0.002)
def test_6s_example3(self):
s = SixS()
s.geometry = Geometry.Landsat_TM()
s.geometry.month = 5
s.geometry.day = 9
s.geometry.gmt_decimal_hour = 11.222
s.geometry.latitude = 40
s.geometry.longitude = 30
s.atmos_profile = AtmosProfile.PredefinedType(
AtmosProfile.MidlatitudeSummer)
s.aero_profile = AeroProfile.MultimodalLogNormalDistribution(0.001, 20)
s.aero_profile.add_component(
0.05,
2.03,
0.538,
[
1.508,
1.500,
1.500,
1.500,
1.500,
1.500,
1.500,
1.500,
1.495,
1.490,
1.490,
1.490,
1.486,
1.480,
1.470,
1.460,
1.456,
1.443,
1.430,
1.470,
],
[
3.24e-07,
3.0e-08,
2.86e-08,
2.51e-08,
2.2e-08,
2.0e-08,
1.0e-08,
1.0e-08,
1.48e-08,
2.0e-08,
6.85e-08,
1.0e-07,
1.25e-06,
3.0e-06,
3.5e-04,
6.0e-04,
6.86e-04,
1.7e-03,
4.0e-03,
1.4e-03,
],
)
s.aero_profile.add_component(
0.0695,
2.03,
0.457,
[
1.452,
1.440,
1.438,
1.433,
1.432,
1.431,
1.431,
1.430,
1.429,
1.429,
1.429,
1.428,
1.427,
1.425,
1.411,
1.401,
1.395,
1.385,
1.364,
1.396,
],
[
1.0e-08,
1.0e-08,
1.0e-08,
1.0e-08,
1.0e-08,
1.0e-08,
1.0e-08,
1.0e-08,
1.38e-08,
1.47e-08,
1.68e-08,
1.93e-08,
4.91e-08,
1.75e-07,
9.66e-06,
1.94e-04,
3.84e-04,
1.12e-03,
2.51e-03,
1.31e-01,
],
)
s.aero_profile.add_component(
0.4,
2.03,
0.005,
[
1.508,
1.500,
1.500,
1.500,
1.500,
1.500,
1.500,
1.500,
1.495,
1.490,
1.490,
1.490,
1.486,
1.480,
1.470,
1.460,
1.456,
1.443,
1.430,
1.470,
],
[
3.24e-07,
3.0e-08,
2.86e-08,
2.51e-08,
2.2e-08,
2.0e-08,
1.0e-08,
1.0e-08,
1.48e-08,
2.0e-08,
6.85e-08,
1.0e-07,
1.25e-06,
3.0e-06,
3.5e-04,
6.0e-04,
6.86e-04,
1.7e-03,
4.0e-03,
1.4e-03,
],
)
s.aot550 = 0.8
s.altitudes.set_target_custom_altitude(2)
s.altitudes.set_sensor_satellite_level()
s.wavelength = Wavelength(PredefinedWavelengths.MODIS_B4)
s.ground_reflectance = GroundReflectance.HomogeneousOcean(
11, 30, 35, 3)
s.run()
self.assertAlmostEqual(s.outputs.apparent_reflectance,
0.1234623,
delta=0.002)