def readStdAlt(self, alt, step=1, unit=True):
'''
returns a string reading the altitude properly, i.e. a QNH-aware reading in feet AMSL under TA, and a flight level above TA.
altitude readings are rounded to closest "step hundred"; FL readings are rounded with given step
(use step=None for no approximation even in feet)
"ft" is appended to string if 'unit' parameter is set
'''
amsl = alt.ftAMSL(self.QNH())
if amsl < self.transitionAltitude() + settings.altitude_tolerance:
return '%d%s' % (
(amsl if step == None else rounded(amsl, 100 * step)),
(' ft' if unit else ''))
else:
fl = alt.FL()
return 'FL%03d' % (fl if step == None else rounded(fl, step))
def __init__(self, mhz):
if isinstance(mhz, str):
if '.' in mhz:
dec_part = mhz.rsplit('.', maxsplit=1)[-1]
if len(dec_part) == 2 and dec_part[
-1] in '27': # ._2 and ._7 endings are shortened 25kHz-step freq's
mhz += '5'
self.mhz = rounded(float(mhz), CommFrequency.spacing)
if abs(self.mhz) < 1e-6: # freq not even 1 Hz
raise ValueError('invalid near-zero comm frequency')
else:
self.mhz = mhz
def xpdrData(self):
res = {}
if self.params.XPDR_mode != '0':
res[Xpdr.CODE] = self.params.XPDR_code
res[Xpdr.IDENT] = self.params.XPDR_idents
if self.params.XPDR_mode not in '0A':
res[Xpdr.ALT] = StdPressureAlt(
rounded(self.params.altitude.ft1013(),
step=(100 if self.params.XPDR_mode == 'C' else 10)))
if self.params.XPDR_mode not in '0AC':
res[Xpdr.IAS] = self.params.ias
res[Xpdr.GND] = self.xpdrGndBit()
res[Xpdr.CALLSIGN] = self.identifier
res[Xpdr.ACFT] = self.aircraft_type
return res
def rounded(self, true_hdg, step=5):
return Heading(
rounded((self.trueAngle() if true_hdg else self.magneticAngle()),
step), true_hdg)
def rounded(self, step=10):
return Speed(rounded(self.kt, step))
def __str__(self):
return '%d kt' % rounded(self.kt)