class TestSparseSHCoefficientsTimeDependentDecimalYearDefault(
TestCase, SHCoefficinetTestMixIn):
times = array([2012.0, 2016.0, 2014.0])
indices = array([(1, 0), (1, 1), (1, -1)])
coeff = array([
[1, 3, 2],
[5, 15, 10],
[10, 30, 20],
])
degree = 1
is_internal = True
validity = tuple(decimal_year_to_mjd2000((2012.0, 2016.0)))
options = {}
@property
def coefficients(self):
return SparseSHCoefficientsTimeDependentDecimalYear(
self.indices, self.coeff, self.times, **self.options)
def test_callable(self):
coeff, degree = self.coefficients(decimal_year_to_mjd2000(2013.0))
assert_allclose(coeff, [[0., 0.], [1.5, 0], [7.5, 15.0]])
self.assertEqual(degree, self.degree)
def test_callable_before_first_time(self):
coeff, degree = self.coefficients(decimal_year_to_mjd2000(2011.0))
assert_allclose(coeff, [[0., 0.], [0.5, 0], [2.5, 5.0]])
self.assertEqual(degree, self.degree)
def eval_model(time=dt.datetime(2020, 1, 1),
coords=grid(),
shc_model=eoxmagmod.data.IGRF13):
"""Evaluate a .shc model at a fixed time
Args:
time (datetime)
coords (ndarray)
shc_model (str): path to file
Returns:
dict: magnetic field vector components:
https://intermagnet.github.io/faq/10.geomagnetic-comp.html
"""
# Convert Python datetime to MJD2000
epoch = eoxmagmod.util.datetime_to_decimal_year(time)
mjd2000 = eoxmagmod.decimal_year_to_mjd2000(epoch)
# Load model
model = eoxmagmod.load_model_shc(shc_model)
# Evaluate in North, East, Up coordinates
height = eoxmagmod.GEODETIC_ABOVE_WGS84
b_neu = model.eval(mjd2000, coords, height, height)
# Inclination (I), declination (D), intensity (F)
inc, dec, F = eoxmagmod.vincdecnorm(b_neu)
return {
"X": b_neu[:, :, 0],
"Y": b_neu[:, :, 1],
"Z": -b_neu[:, :, 2],
"I": inc,
"D": dec,
"F": F
}
class TestSparseSHCoefficientsTimeDependentDecimalYearExtendedValidity(
TestSparseSHCoefficientsTimeDependentDecimalYearDefault):
validity = tuple(decimal_year_to_mjd2000((2010.0, 2018.0)))
options = {"validity_start": 2010.0, "validity_end": 2018.0}
def test_callable_before_first_time(self):
coeff, degree = self.coefficients(decimal_year_to_mjd2000(2011.0))
assert_allclose(coeff, [[0., 0.], [0.5, 0], [2.5, 5.0]])
self.assertEqual(degree, self.degree)
def test_callable(self):
coeff, degree = self.coefficients(decimal_year_to_mjd2000(2013.0))
assert_allclose(coeff, [[0., 0.], [1.5, 0], [7.5, 15.0]])
self.assertEqual(degree, self.degree)
class TestFieldLineTracing(TestCase):
time = decimal_year_to_mjd2000(2015.5)
point = START_POINT
points = FIELD_LINE_POINTS
@property
def model(self):
if not hasattr(self, "_model"):
self._model = load_model_shc(IGRF12,
interpolate_in_decimal_years=True)
return self._model
def test_trace_field_line_wgs84(self):
point = self.point
points, vectors = trace_field_line(
self.model,
self.time,
point,
input_coordinate_system=GEODETIC_ABOVE_WGS84,
output_coordinate_system=GEODETIC_ABOVE_WGS84,
)
assert_allclose(points, self.points)
assert_allclose(
vectors,
self.model.eval(
self.time,
points,
input_coordinate_system=GEODETIC_ABOVE_WGS84,
output_coordinate_system=GEODETIC_ABOVE_WGS84,
))
def test_trace_field_line_spherical(self):
point = convert(self.point, GEODETIC_ABOVE_WGS84, GEOCENTRIC_SPHERICAL)
points, vectors = trace_field_line(
self.model,
self.time,
point,
input_coordinate_system=GEOCENTRIC_SPHERICAL,
output_coordinate_system=GEOCENTRIC_SPHERICAL,
)
assert_allclose(
points,
convert(self.points, GEODETIC_ABOVE_WGS84, GEOCENTRIC_SPHERICAL))
assert_allclose(
vectors,
self.model.eval(
self.time,
points,
input_coordinate_system=GEOCENTRIC_SPHERICAL,
output_coordinate_system=GEOCENTRIC_SPHERICAL,
))
def test_trace_field_line_cartesian(self):
point = convert(self.point, GEODETIC_ABOVE_WGS84, GEOCENTRIC_CARTESIAN)
points, vectors = trace_field_line(
self.model,
self.time,
point,
input_coordinate_system=GEOCENTRIC_CARTESIAN,
output_coordinate_system=GEOCENTRIC_CARTESIAN,
)
assert_allclose(
points,
convert(self.points, GEODETIC_ABOVE_WGS84, GEOCENTRIC_CARTESIAN))
assert_allclose(
vectors,
self.model.eval(
self.time,
points,
input_coordinate_system=GEOCENTRIC_CARTESIAN,
output_coordinate_system=GEOCENTRIC_CARTESIAN,
))
