class AccuratePredictorCalculationErrorTests(TestCase):
"""Check that we can learn from calculation errors and provide patches for corner cases"""
def setUp(self):
# Source
self.db = MemoryTLESource()
self.db.add_tle(BUGSAT_SATE_ID, BUGSAT1_TLE_LINES,
dt.datetime.utcnow())
# Predictor
self.predictor = TLEPredictor(BUGSAT_SATE_ID, self.db)
self.is_ascending_mock = self._patch(
'orbit_predictor.predictors.base.LocationPredictor._is_ascending')
self.start = dt.datetime(2017, 3, 6, 7, 51)
logassert.setup(self, 'orbit_predictor.predictors.pass_iterators')
def _patch(self, *args, **kwargs):
patcher = mock.patch(*args, **kwargs)
self.addCleanup(patcher.stop)
return patcher.start()
def test_ascending_failure(self):
self.is_ascending_mock.return_value = False
with self.assertRaises(PropagationError):
self.predictor.get_next_pass(
ARG, self.start, location_predictor_class=LocationPredictor)
self.assertLoggedError(str(ARG), str(self.start), *BUGSAT1_TLE_LINES)
def test_descending_failure(self):
self.is_ascending_mock.return_value = True
with self.assertRaises(PropagationError):
self.predictor.get_next_pass(
ARG, self.start, location_predictor_class=LocationPredictor)
self.assertLoggedError(str(ARG), str(self.start), *BUGSAT1_TLE_LINES)
class AccurateVsGpredictTests(TestCase):
def setUp(self):
# Source
self.db = MemoryTLESource()
self.db.add_tle(BUGSAT_SATE_ID, BUGSAT1_TLE_LINES,
dt.datetime.utcnow())
# Predictor
self.predictor = TLEPredictor(BUGSAT_SATE_ID, self.db)
def test_get_next_pass_with_stk_data(self):
STK_DATA = """
------------------------------------------------------------------------------------------------
AOS TCA LOS Duration Max El
------------------------------------------------------------------------------------------------
2014/10/23 01:27:33.224 2014/10/23 01:32:41.074 2014/10/23 01:37:47.944 00:10:14.720 12.76
2014/10/23 03:01:37.007 2014/10/23 03:07:48.890 2014/10/23 03:14:01.451 00:12:24.000 39.32
2014/10/23 14:49:34.783 2014/10/23 14:55:44.394 2014/10/23 15:01:51.154 00:12:16.000 41.75
2014/10/23 16:25:54.939 2014/10/23 16:30:50.152 2014/10/23 16:35:44.984 00:09:50.000 11.45
2014/10/24 01:35:47.889 2014/10/24 01:41:13.181 2014/10/24 01:46:37.548 00:10:50.000 16.07
2014/10/24 03:10:23.486 2014/10/24 03:16:27.230 2014/10/24 03:22:31.865 00:12:08.000 30.62
2014/10/24 14:58:07.378 2014/10/24 15:04:21.721 2014/10/24 15:10:33.546 00:12:26.000 54.83
2014/10/24 16:34:48.635 2014/10/24 16:39:20.960 2014/10/24 16:43:53.204 00:09:04.000 8.78
2014/10/25 01:44:05.771 2014/10/25 01:49:45.487 2014/10/25 01:55:24.414 00:11:18.000 20.07
2014/10/25 03:19:12.611 2014/10/25 03:25:05.674 2014/10/25 03:30:59.815 00:11:47.000 24.09""" # NOQA
for line in STK_DATA.splitlines()[4:]:
line_parts = line.split()
aos = dt.datetime.strptime(" ".join(line_parts[:2]),
'%Y/%m/%d %H:%M:%S.%f')
max_elevation_date = dt.datetime.strptime(
" ".join(line_parts[2:4]), '%Y/%m/%d %H:%M:%S.%f')
los = dt.datetime.strptime(" ".join(line_parts[4:6]),
'%Y/%m/%d %H:%M:%S.%f')
duration = dt.datetime.strptime(line_parts[6], '%H:%M:%S.%f')
duration_s = dt.timedelta(minutes=duration.minute,
seconds=duration.second).total_seconds()
max_elev_deg = float(line_parts[7])
try:
date = pass_.los # NOQA
except UnboundLocalError:
date = dt.datetime.strptime("2014-10-22 20:18:11.921921",
'%Y-%m-%d %H:%M:%S.%f')
pass_ = self.predictor.get_next_pass(ARG, date)
self.assertAlmostEqual(pass_.aos, aos, delta=ONE_SECOND)
self.assertAlmostEqual(pass_.los, los, delta=ONE_SECOND)
self.assertAlmostEqual(pass_.max_elevation_date,
max_elevation_date,
delta=ONE_SECOND)
self.assertAlmostEqual(pass_.duration_s, duration_s, delta=2 * 1)
self.assertAlmostEqual(pass_.max_elevation_deg,
max_elev_deg,
delta=0.05)
class AccuratePredictorTests(TestCase):
def setUp(self):
# Source
self.db = MemoryTLESource()
self.start = datetime(2017, 3, 6, 7, 51)
self.db.add_tle(SATE_ID, LINES, self.start)
# Predictor
self.predictor = HighAccuracyTLEPredictor(SATE_ID, self.db)
self.old_predictor = TLEPredictor(SATE_ID, self.db)
self.end = self.start + timedelta(days=5)
def all_passes_old_predictor(self, location, start, end):
while True:
try:
pass_ = self.old_predictor.get_next_pass(location,
when_utc=start,
limit_date=end)
start = pass_.los
yield pass_
except Exception:
break
def assertEqualOrGreaterPassesAmount(self, location):
"""Compare propagators and check no passes lost and no performance degradation"""
t0 = time.time()
old_passes = list(
self.all_passes_old_predictor(location, self.start, self.end))
t1 = time.time()
predicted_passes = list(
self.predictor.passes_over(location, self.start, self.end))
t2 = time.time()
self.assertGreaterEqual(len(predicted_passes), len(old_passes),
'We are loosing passes')
self.assertLessEqual(t2 - t1, t1 - t0, 'Performance is degraded')
def test_accurate_predictor_find_more_or_equal_passes_amount(self):
self.assertEqualOrGreaterPassesAmount(
Location('bad-case-1', 11.937501570612568, -55.35189435098657,
1780.674044538666))
self.assertEqualOrGreaterPassesAmount(tortu1)
self.assertEqualOrGreaterPassesAmount(svalbard)
self.assertEqualOrGreaterPassesAmount(
Location('bad-case-2', -11.011509137116818, 123.29554733688798,
1451.5695915302097))
self.assertEqualOrGreaterPassesAmount(
Location('bad-case-3', 10.20803236163988, 138.01236517021056,
4967.661890730469))
self.assertEqualOrGreaterPassesAmount(
Location('less passes', -82.41515032683046, -33.712555446065664,
4417.427841452149))
def test_predicted_passes_are_equal_between_executions(self):
location = Location('bad-case-1', 11.937501570612568,
-55.35189435098657, 1780.674044538666)
first_set = list(
self.predictor.passes_over(location, self.start, self.end))
second_set = list(
self.predictor.passes_over(location,
self.start + timedelta(seconds=3),
self.end))
self.assertEqual(first_set, second_set)
def test_predicted_passes_have_elevation_positive_and_visible_on_date(
self):
end = self.start + timedelta(days=60)
for pass_ in self.predictor.passes_over(svalbard, self.start, end):
self.assertGreater(pass_.max_elevation_deg, 0)
position = self.old_predictor.get_position(
pass_.max_elevation_date)
svalbard.is_visible(position)
self.assertGreaterEqual(pass_.off_nadir_deg, -90)
self.assertLessEqual(pass_.off_nadir_deg, 90)
def test_predicted_passes_off_nadir_angle_works(self):
start = datetime(2017, 3, 6, 13, 30)
end = start + timedelta(hours=1)
location = Location('bad-case-1', 11.937501570612568,
-55.35189435098657, 1780.674044538666)
pass_ = self.predictor.get_next_pass(location,
when_utc=start,
limit_date=end)
self.assertGreaterEqual(0, pass_.off_nadir_deg)
@given(start=datetimes(
min_value=datetime(2017, 1, 1),
max_value=datetime(2020, 12, 31),
),
location=tuples(floats(min_value=-90, max_value=90),
floats(min_value=0, max_value=180),
floats(min_value=-200, max_value=9000)))
@settings(max_examples=10000, deadline=None)
@example(start=datetime(2017, 1, 26, 11, 51, 51),
location=(-37.69358328273305, 153.96875, 0.0))
def test_pass_is_always_returned(self, start, location):
location = Location('bad-case-1', *location)
pass_ = self.predictor.get_next_pass(location, start)
self.assertGreater(pass_.max_elevation_deg, 0)
def test_aos_deg_can_be_used_in_get_next_pass(self):
start = datetime(2017, 3, 6, 13, 30)
end = start + timedelta(hours=1)
location = Location('bad-case-1', 11.937501570612568,
-55.35189435098657, 1780.674044538666)
complete_pass = self.predictor.get_next_pass(location,
when_utc=start,
limit_date=end)
pass_with_aos = self.predictor.get_next_pass(location,
when_utc=start,
limit_date=end,
aos_at_dg=5)
self.assertGreater(pass_with_aos.aos, complete_pass.aos)
self.assertLess(pass_with_aos.aos, complete_pass.max_elevation_date)
self.assertAlmostEqual(pass_with_aos.max_elevation_date,
complete_pass.max_elevation_date,
delta=timedelta(seconds=1))
self.assertGreater(pass_with_aos.los, complete_pass.max_elevation_date)
self.assertLess(pass_with_aos.los, complete_pass.los)
position = self.old_predictor.get_position(pass_with_aos.aos)
_, elev = location.get_azimuth_elev_deg(position)
self.assertAlmostEqual(elev, 5, delta=0.1)
position = self.old_predictor.get_position(pass_with_aos.los)
_, elev = location.get_azimuth_elev_deg(position)
self.assertAlmostEqual(elev, 5, delta=0.1)
def test_predicted_passes_whit_aos(self):
end = self.start + timedelta(days=60)
for pass_ in self.predictor.passes_over(svalbard,
self.start,
end,
aos_at_dg=5):
self.assertGreater(pass_.max_elevation_deg, 5)
position = self.old_predictor.get_position(pass_.aos)
_, elev = svalbard.get_azimuth_elev_deg(position)
self.assertAlmostEqual(elev, 5, delta=0.1)
class LocationTestCase(unittest.TestCase):
def setUp(self):
# Source
self.db = MemoryTLESource()
self.db.add_tle(SATE_ID, BUGSAT1_TLE_LINES, datetime.datetime.now())
# Predictor
self.predictor = TLEPredictor(SATE_ID, self.db)
date = datetime.datetime.strptime("2014-10-22 20:18:11.921921",
'%Y-%m-%d %H:%M:%S.%f')
self.next_pass = self.predictor.get_next_pass(ARG, when_utc=date)
def test_compare_eq(self):
l1 = Location(latitude_deg=1,
longitude_deg=2,
elevation_m=3,
name="location1")
l2 = Location(latitude_deg=1,
longitude_deg=2,
elevation_m=3,
name="location1")
self.assertEqual(l1, l2)
self.assertEqual(l2, l1)
def test_compare_no_eq(self):
l1 = Location(latitude_deg=1,
longitude_deg=2,
elevation_m=3,
name="location_other")
l2 = Location(latitude_deg=1,
longitude_deg=2,
elevation_m=3,
name="location1")
self.assertNotEqual(l1, l2)
self.assertNotEqual(l2, l1)
def test_compare_eq_subclass(self):
class SubLocation(Location):
pass
l1 = Location(latitude_deg=1,
longitude_deg=2,
elevation_m=3,
name="location1")
l2 = SubLocation(latitude_deg=1,
longitude_deg=2,
elevation_m=3,
name="location1")
self.assertEqual(l1, l2)
self.assertEqual(l2, l1)
def test_get_azimuth_elev(self):
date = datetime.datetime.strptime("2014-10-21 22:47:29.147740",
'%Y-%m-%d %H:%M:%S.%f')
azimuth, elevation = ARG.get_azimuth_elev(
self.predictor.get_position(date))
self.assertAlmostEqual(degrees(azimuth), 249.7, delta=0.1)
self.assertAlmostEqual(degrees(elevation), -52.1, delta=0.1)
def test_get_azimuth_elev_deg(self):
date = datetime.datetime.strptime("2014-10-21 22:47:29.147740",
'%Y-%m-%d %H:%M:%S.%f')
azimuth, elevation = ARG.get_azimuth_elev_deg(
self.predictor.get_position(date))
self.assertAlmostEqual(azimuth, 249.7, delta=0.1)
self.assertAlmostEqual(elevation, -52.1, delta=0.1)
def test_is_visible(self):
position = self.predictor.get_position(self.next_pass.aos)
self.assertTrue(ARG.is_visible(position))
def test_no_visible(self):
position = self.predictor.get_position(self.next_pass.los +
datetime.timedelta(minutes=10))
self.assertFalse(ARG.is_visible(position))
def test_is_visible_with_deg(self):
position = self.predictor.get_position(self.next_pass.aos +
datetime.timedelta(minutes=4))
# 21 deg
self.assertTrue(ARG.is_visible(position, elevation=4))
def test_no_visible_with_deg(self):
position = self.predictor.get_position(self.next_pass.aos +
datetime.timedelta(minutes=4))
# 21 deg
self.assertFalse(ARG.is_visible(position, elevation=30))
def test_doppler_factor(self):
date = datetime.datetime.strptime("2014-10-21 23:06:11.132438",
'%Y-%m-%d %H:%M:%S.%f')
position = self.predictor.get_position(date)
doppler_factor = ARG.doppler_factor(position)
self.assertAlmostEqual((2 - doppler_factor) * 437.445e6,
437.445632e6,
delta=100)
class AccuratePredictorTests(TestCase):
def setUp(self):
# Source
self.db = MemoryTLESource()
self.start = dt.datetime(2017, 3, 6, 7, 51)
self.db.add_tle(SATE_ID, LINES, self.start)
# Predictor
self.predictor = TLEPredictor(SATE_ID, self.db)
self.end = self.start + dt.timedelta(days=5)
def test_predicted_passes_are_equal_between_executions(self):
location = Location('bad-case-1', 11.937501570612568,
-55.35189435098657, 1780.674044538666)
first_set = list(
self.predictor.passes_over(location, self.start, self.end))
second_set = list(
self.predictor.passes_over(location,
self.start + dt.timedelta(seconds=3),
self.end))
# We use delta=ONE_SECOND because
# that's the hardcoded value for the precision
self.assertAlmostEqual(first_set[0].aos,
second_set[0].aos,
delta=ONE_SECOND)
self.assertAlmostEqual(first_set[0].los,
second_set[0].los,
delta=ONE_SECOND)
def test_predicted_passes_have_elevation_positive_and_visible_on_date(
self):
end = self.start + dt.timedelta(days=60)
for pass_ in self.predictor.passes_over(ARG, self.start, end):
self.assertGreater(pass_.max_elevation_deg, 0)
position = self.predictor.get_position(pass_.max_elevation_date)
ARG.is_visible(position)
self.assertGreaterEqual(pass_.off_nadir_deg, -90)
self.assertLessEqual(pass_.off_nadir_deg, 90)
def test_predicted_passes_off_nadir_angle_works(self):
start = dt.datetime(2017, 3, 6, 13, 30)
end = start + dt.timedelta(hours=1)
location = Location('bad-case-1', 11.937501570612568,
-55.35189435098657, 1780.674044538666)
pass_ = self.predictor.get_next_pass(location,
when_utc=start,
limit_date=end)
self.assertGreaterEqual(0, pass_.off_nadir_deg)
@given(start=datetimes(
min_value=dt.datetime(2017, 1, 1),
max_value=dt.datetime(2020, 12, 31),
),
location=tuples(floats(min_value=-90, max_value=90),
floats(min_value=0, max_value=180),
floats(min_value=-200, max_value=9000)))
@settings(max_examples=10000, deadline=None)
@example(start=dt.datetime(2017, 1, 26, 11, 51, 51),
location=(-37.69358328273305, 153.96875, 0.0))
def test_pass_is_always_returned(self, start, location):
location = Location('bad-case-1', *location)
pass_ = self.predictor.get_next_pass(location, start)
self.assertGreater(pass_.max_elevation_deg, 0)
def test_aos_deg_can_be_used_in_get_next_pass(self):
start = dt.datetime(2017, 3, 6, 13, 30)
end = start + dt.timedelta(hours=1)
location = Location('bad-case-1', 11.937501570612568,
-55.35189435098657, 1780.674044538666)
complete_pass = self.predictor.get_next_pass(location,
when_utc=start,
limit_date=end)
pass_with_aos = self.predictor.get_next_pass(location,
when_utc=start,
limit_date=end,
aos_at_dg=5)
self.assertGreater(pass_with_aos.aos, complete_pass.aos)
self.assertLess(pass_with_aos.aos, complete_pass.max_elevation_date)
self.assertAlmostEqual(pass_with_aos.max_elevation_date,
complete_pass.max_elevation_date,
delta=dt.timedelta(seconds=1))
self.assertGreater(pass_with_aos.los, complete_pass.max_elevation_date)
self.assertLess(pass_with_aos.los, complete_pass.los)
position = self.predictor.get_position(pass_with_aos.aos)
_, elev = location.get_azimuth_elev_deg(position)
self.assertAlmostEqual(elev, 5, delta=0.1)
position = self.predictor.get_position(pass_with_aos.los)
_, elev = location.get_azimuth_elev_deg(position)
self.assertAlmostEqual(elev, 5, delta=0.1)
def test_predicted_passes_whit_aos(self):
end = self.start + dt.timedelta(days=60)
for pass_ in self.predictor.passes_over(ARG,
self.start,
end,
aos_at_dg=5):
self.assertGreater(pass_.max_elevation_deg, 5)
position = self.predictor.get_position(pass_.aos)
_, elev = ARG.get_azimuth_elev_deg(position)
self.assertAlmostEqual(elev, 5, delta=0.1)