def test_bad_second_line(self):
with self.assertRaisesRegex(
ValueError,
re.escape("""TLE format error
The Two-Line Element (TLE) format was designed for punch cards, and so
is very strict about the position of every period, space, and digit.
Your line does not quite match. Here is the official format for line 2
with an N where each digit should go, followed by the line you provided:
2 NNNNN NNN.NNNN NNN.NNNN NNNNNNN NNN.NNNN NNN.NNNN NN.NNNNNNNNNNNNNN
2 00005 34 .268234 8.7242 1859667 331.7664 19.3264 10.82419157413667""")):
io.twoline2rv(good1, good2.replace(' 34', '34 '), wgs72)
def test_bad_first_line(self):
with self.assertRaisesRegex(
ValueError,
re.escape("""TLE format error
The Two-Line Element (TLE) format was designed for punch cards, and so
is very strict about the position of every period, space, and digit.
Your line does not quite match. Here is the official format for line 1
with an N where each digit should go, followed by the line you provided:
1 NNNNNC NNNNNAAA NNNNN.NNNNNNNN +.NNNNNNNN +NNNNN-N +NNNNN-N N NNNNN
1 00005U 58002B 00179.78495062 .000000234 00000-0 28098-4 0 4753""")):
io.twoline2rv(good1.replace('23 ', '234'), good2, wgs72)
def generate_test_output(whichconst, error_list):
"""Generate lines like those in the test file tcppver.out.
This iterates through the satellites in "SGP4-VER.TLE", which are
each supplemented with a time start/stop/step over which we are
supposed to print results.
"""
whichconst = wgs72
tlepath = os.path.join(thisdir, 'SGP4-VER.TLE')
with open(tlepath) as tlefile:
tlelines = iter(tlefile.readlines())
for line1 in tlelines:
if not line1.startswith('1'):
continue
line2 = next(tlelines)
satrec = io.twoline2rv(line1, line2, whichconst)
yield '%ld xx\n' % (satrec.satnum, )
for line in generate_satellite_output(satrec, line2, error_list):
yield line
def __init__(self, text, earth):
lines = text.splitlines()
sat = twoline2rv(*lines[-2:], whichconst=wgs72)
self._sgp4_satellite = sat
self._earth = earth
self.epoch = JulianDate(utc=(sat.epochyr, 1, sat.epochdays - 1.0))
def test_mismatched_lines(self):
msg = "Object numbers in lines 1 and 2 do not match"
with self.assertRaisesRegex(ValueError, re.escape(msg)):
io.twoline2rv(good1, bad2, wgs72)
from earth_gravity import wgs72
from sgp4io import twoline2rv
line1 = (
'1 43013U 17073A 19261.50913870 .00000008 00000-0 24702-4 0 9998')
line2 = (
'2 43013 98.7245 198.2889 0001389 73.3480 286.7849 14.19543304 94932')
satellite = twoline2rv(line1, line2, wgs72)
position, velocity = satellite.propagate(2000, 6, 29, 12, 50, 19)
print(position)
print(velocity)