def massage_qth(qth):
""" Function for getting correct qth data format. """
try:
assert len(qth) == 3, "%s must consist of exactly three elements: (lat(N), long(W), alt(m))" % qth
return (float(qth[0]), float(qth[1]), int(qth[2]))
except ValueError as e:
raise PredictException("Unable to convert '%s' (%s)" % (qth, e))
except Exception as e:
raise PredictException(e)
def host_qth(path="~/.predict/predict.qth"):
path = os.path.abspath(os.path.expanduser(path))
try:
with open(path) as qthfile:
raw = [l.strip() for l in qthfile.readlines()]
assert len(
raw) == 4, "must match:\nname\nlat(N)\nlong(W)\nalt" % path
return massage_qth(raw[1:])
except Exception as e:
raise PredictException("Unable to process qth '%s' (%s)" % (path, e))
def massage_tle(tle):
""" Function for getting correct tle data format. """
try:
# If tle has not been split yet
if isinstance(tle, str):
tle = tle.rstrip().split('\n')
assert len(tle) == 3, "TLE must be 3 lines, not %d: %s" % (len(tle), tle)
return tle
except Exception as e:
raise PredictException(e)
def massage_tle(tle):
try:
# TLE may or may not have been split into lines already
if isinstance(tle, basestring):
tle = tle.rstrip().split('\n')
assert len(tle) == 3, "TLE must be 3 lines, not %d: %s" % (len(tle),
tle)
return tle
#TODO: print a warning if TLE is 'too' old
except Exception as e:
raise PredictException(e)
def at(self, t):
""" Function to return azimuth and elevation at certain time. """
if t < self.start or t > self.end:
raise PredictException("time %f outside transit [%f, %f]" %
(t, self.start, self.end))
return observe(self.tle, self.qth, t)
def at(self, t):
if t < self.start or t > self.end:
raise PredictException("time %f outside transit [%f, %f]" %
(t, self.start, self.end))
return observe(self.tle, self.qth, t)
def at(self, t, epsilon=0.001):
if t < (self.start - epsilon) or t > (self.end + epsilon):
raise PredictException("time %f outside transit [%f, %f]" %
(t, self.start, self.end))
return observe(self.tle, self.qth, t)