def test_get_Lstar_OPQuiet_multi(self):
"""Test Lstar on OPQ forcing multiprocess"""
cpu_actual = spacepy.config['ncpus']
# To trigger a worker pool, number of calcs must be
# more than double number of cpus
spacepy.config['ncpus'] = 4
try:
ticks = spacepy.time.tickrange(self.ticks.ISO[0], self.ticks.ISO[-1], 1/1440.)
ncalc = len(ticks) # Forced 10 times in test data range
loci = spacepy.coordinates.Coords([[nc-4, 6-nc, 0] for nc in range(ncalc)], 'GEO', 'car')
omnivals = spacepy.omni.get_omni(ticks, dbase='Test')
expected = {'Lstar': array([[6.84698], [5.58814], [4.35608],
[3.13613], [1.97344], [1.41439],
[2.05375], [3.19979], [4.35920],
[5.38242]]),
'Lm': array([[7.61427481], [6.13826804], [4.65907084],
[3.21519241], [1.97225109], [1.41105356],
[2.05626165], [3.28414042], [4.6531115 ],
[5.92800457]])
}
# OPQ won't use the OMNI, but if they're passed in
# the code still processes them, so answers should be identical
actuali= ib.get_Lstar(ticks, loci, [90], extMag="OPQUIET", omnivals=omnivals)
actualn = ib.get_Lstar(ticks, loci, [90], extMag="OPQUIET", omnivals=None)
finally:
spacepy.config['ncpus'] = cpu_actual
# Check that results are as expected
numpy.testing.assert_almost_equal(expected['Lstar'], actuali['Lstar'], decimal=5)
numpy.testing.assert_almost_equal(expected['Lm'], actuali['Lm'], decimal=5)
numpy.testing.assert_almost_equal(expected['Lstar'], actualn['Lstar'], decimal=5)
numpy.testing.assert_almost_equal(expected['Lm'], actualn['Lm'], decimal=5)
def test_get_Lstar_TooManyPA(self):
"""test OP-Quiet with too many pitch angles"""
with self.assertRaises(ValueError) as cm:
ib.get_Lstar(
self.ticks, self.loci, numpy.arange(5, 180, 5),
extMag="OPQUIET", omnivals=self.omnivals)
self.assertEqual('Too many pitch angles requested; 25 is maximum.',
str(cm.exception))
def calc_Lvals(year):
counts_file = "/home/wyatt/Documents/SAMPEX/bounce/correlation/data/accepted_" + str(
year) + ".csv"
times = pd.read_csv(counts_file,
header=None,
names=["Burst", "Time"],
usecols=[0, 1])
times['Time'] = pd.to_datetime(times['Time'])
times = times.set_index('Burst')
irb_L_list = []
samp_L_list = []
indices = times.index.drop_duplicates()
for ind in indices:
print(ind)
start = times.loc[ind].iloc[0]["Time"]
end = times.loc[ind].iloc[-1]["Time"]
dataObj = sp.OrbitData(date=start)
orbitInfo = dataObj.read_time_range(
pd.to_datetime(start),
pd.to_datetime(end),
parameters=['GEI_X', 'GEI_Y', 'GEI_Z', 'L_Shell'])
X = (orbitInfo['GEI_X'].to_numpy() / Re)[0]
Y = (orbitInfo['GEI_Y'].to_numpy() / Re)[0]
Z = (orbitInfo['GEI_Z'].to_numpy() / Re)[0]
position = np.array([X, Y, Z])
ticks = Ticktock(start)
coords = spc.Coords(position, 'GEI', 'car')
irb_Lstar = irb.get_Lstar(ticks, coords, extMag=magField)
irb_Lstar = irb_Lstar['Lm'][0]
samp_Lstar = orbitInfo['L_Shell'].to_numpy()[0]
irb_L_list.append(irb_Lstar[0])
samp_L_list.append(samp_Lstar)
return irb_L_list, samp_L_list
def _bounce_period(self, times, energy=1):
"""
calculates electron bounce period at edge of loss cone
energy in MeV
"""
start = times[0]
end = times[-1]
dataObj = sp.OrbitData(date=start)
orbitInfo = dataObj.read_time_range(
pd.to_datetime(start),
pd.to_datetime(end),
parameters=['GEI_X', 'GEI_Y', 'GEI_Z', 'L_Shell', 'GEO_Lat'])
X = (orbitInfo['GEI_X'].to_numpy() / self.Re)[0]
Y = (orbitInfo['GEI_Y'].to_numpy() / self.Re)[0]
Z = (orbitInfo['GEI_Z'].to_numpy() / self.Re)[0]
position = np.array([X, Y, Z])
ticks = Ticktock(times[0])
coords = spc.Coords(position, 'GEI', 'car')
#something bad is happening with IRBEM, the L values are crazy for a lot of
#these places, so for now I'll use sampex's provided L vals
Lstar = irb.get_Lstar(ticks, coords, extMag='0')
Lstar = abs(Lstar['Lm'][0])
# Lstar = orbitInfo['L_Shell'].to_numpy()[0]
self.Lstar = Lstar
loss_cone = self._find_loss_cone(coords, ticks) #in degrees
period = 5.62 * 10**(-2) * Lstar / np.sqrt(energy) * (
1 - .43 * np.sin(np.deg2rad(loss_cone)))
return period[0]
def test_get_Lstar_OPQuiet(self):
# test OP-Quiet
expected = {'Xj': array([[ 0.001051], [ 0.002722]]),
'Lstar': array([[ 3.029621], [ 2.059631]]),
'Blocal': array([ 1019.052401, 3467.52999]),
'Lm': array([[ 3.091352], [ 2.056261]]),
'Bmin': array([ 1018.669701, 3459.500966 ]),
'MLT': array([ 11.97159175, 12.13313906])}
actual = ib.get_Lstar(self.ticks, self.loci, [90], extMag="OPQUIET", omnivals=self.omnivals)
for key in expected.keys():
numpy.testing.assert_almost_equal(expected[key], actual[key], decimal=6)
def test_get_Lstar_T05(self):
# test T05
expected = {'Xj': array([[ 0.266114], [ 0.186008]]),
'Lstar': array([[ 3.015461], [ 2.043043]]),
'Bmirr': array([[ 1150.670441], [ 3895.810805]]),
'Lm': array([[ 3.087026], [ 2.059734]]),
'Bmin': array([ 1015.468031, 3432.146907]),
'MLT': array([ 11.97159175, 12.13313906])}
actual = ib.get_Lstar(self.ticks, self.loci, [70], extMag='T05', omnivals=self.omnivals)
for key in expected:
numpy.testing.assert_almost_equal(expected[key], actual[key], decimal=6)
def test_get_Lstar_T01(self):
# test T01STORM
expected = {'Xj': array([[ 0.000403], [ 0.00269002]]),
'Lstar': array([[ 3.025887], [ 2.054195]]),
'Bmirr': array([[ 1031.008992], [ 3451.98937]]),
'Lm': array([[ 3.079151], [ 2.059326]]),
'Bmin': array([ 1030.456337, 3444.077016 ]),
'MLT': array([ 11.97159175, 12.13313906])}
actual = ib.get_Lstar(self.ticks, self.loci, [90], omnivals=self.omnivals)
for key in expected.keys():
numpy.testing.assert_almost_equal(expected[key], actual[key], decimal=6)
def test_get_Lstar_T05(self):
# test T05
expected = {'Xj': array([[ 0.26613994], [ 0.18600614]]),
'Lstar': array([[ 3.01546295], [ 2.04304142]]),
'Bmirr': array([[ 1150.72621313], [ 3895.75273416]]),
'Lm': array([[ 3.08699012], [ 2.05974291]]),
'Bmin': array([ 1015.51219038, 3432.08956401]),
'MLT': array([ 11.97159175, 12.13313906])}
actual = ib.get_Lstar(self.ticks, self.loci, [70], extMag='T05', omnivals=self.omnivals)
for key in expected:
numpy.testing.assert_almost_equal(expected[key], actual[key], decimal=6)
def test_get_Lstar_T01(self):
# test T01STORM
expected = {'Xj': array([[ 0.00040101], [ 0.00269002]]),
'Lstar': array([[ 3.02588835], [ 2.0523954]]),
'Bmirr': array([[ 1031.05446706], [ 3451.97910165]]),
'Lm': array([[ 3.07910515], [ 2.05932846]]),
'Bmin': array([ 1030.50271503, 3444.0670669 ]),
'MLT': array([ 11.97159175, 12.13313906])}
actual = ib.get_Lstar(self.ticks, self.loci, [90], omnivals=self.omnivals)
for key in expected.keys():
numpy.testing.assert_almost_equal(expected[key], actual[key], decimal=6)
def test_get_Lstar_T01(self):
# test T01STORM
expected = {
'Xj': array([[0.00040101], [0.00269002]]),
'Lstar': array([[3.02588835], [2.0523954]]),
'Bmirr': array([[1031.05446706], [3451.97910165]]),
'Lm': array([[3.07910515], [2.05932846]]),
'Bmin': array([1030.50271503, 3444.0670669]),
'MLT': array([11.97159175, 12.13313906])
}
actual = ib.get_Lstar(self.ticks,
self.loci, [90],
omnivals=self.omnivals)
for key in expected.keys():
numpy.testing.assert_almost_equal(expected[key],
actual[key],
decimal=6)
def ComputeLshell(inTime, c1, c2, c3, inCoordName, inCoordType):
"""
This function uses spacepy to compute L shell and MLT from given time and position values.
It uses the IRBEM library to do the calculations.
INPUTS:
inTime: array: time in UTC timestamp
c1: array: x, alt
c2: array: y, lat
c3: array: z, lon
inCoordName: string: GDZ, GEO, GSM, GSE, SM, GEI, MAG, SPH, RLL
inCoordType: string: car, sph
OUTPUT:
c1: array: Lm
c2: array: Lstar
c3: array: MLT
"""
# Start timer
tic = time.perf_counter()
#print("Starting ...")
#pack position arrays in desired format
sat_track = [[c1[i], c2[i], c3[i]] for i in range(len(c1))]
#convert utc_ts to spacepy time strings
@np.vectorize
def ts_to_spacepystr(ts):
return dt.strftime(dt.utcfromtimestamp(int(ts)), '%Y-%m-%dT%H:%M:%S')
#perform coordinate conversion
cvals = Coords(sat_track, inCoordName, inCoordType)
tt = Ticktock(ts_to_spacepystr(inTime), 'ISO')
qq = get_Lstar(tt, cvals)
Lm = abs(np.reshape(qq['Lm'], -1))
Lstar = abs(np.reshape(qq['Lstar'], -1))
MLT = qq['MLT']
toc = time.perf_counter()
print('Computed Lm,lstar,MLT in', "{:0.4f}".format(toc - tic),
'seconds for', len(inTime), ' positions.')
return Lm, Lstar, MLT
def test_get_Lstar_T05(self):
# test T05
expected = {
'Xj': array([[0.26613994], [0.18600614]]),
'Lstar': array([[3.01546295], [2.04304142]]),
'Bmirr': array([[1150.72621313], [3895.75273416]]),
'Lm': array([[3.08699012], [2.05974291]]),
'Bmin': array([1015.51219038, 3432.08956401]),
'MLT': array([11.97159175, 12.13313906])
}
actual = ib.get_Lstar(self.ticks,
self.loci, [70],
extMag='T05',
omnivals=self.omnivals)
for key in expected:
numpy.testing.assert_almost_equal(expected[key],
actual[key],
decimal=6)
