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Merge pull request #2 from zmoratto/master

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SBS improvements  pull request
This commit is contained in:
bistromath 2011-07-11 10:01:39 -07:00
commit 7208aeefe0
1 changed files with 108 additions and 25 deletions
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133
src/python/modes_sbs1.py
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@ -33,6 +33,31 @@ class modes_output_sbs1(modes_parse.modes_parse):
self._s.listen(1)
self._s.setblocking(0) #nonblocking
self._conns = [] #list of active connections
self._aircraft_id_map = {} # dictionary of icao24 to aircraft IDs
self._aircraft_id_count = 0 # Current Aircraft ID count
def __del__(self):
self._s.close()
def get_aircraft_id(self, icao24):
if icao24 in self._aircraft_id_map:
return self._aircraft_id_map[icao24]
# Adding this new ID to the dictionary
self._aircraft_id_count += 1
self._aircraft_id_map[icao24] = self._aircraft_id_count
# Checking to see if we need to clean up in the event that the
# dictionary is getting too large.
if len(self._aircraft_id_map) > 1e4:
minimum = ('', self._aircraft_id_count)
for pair in self._aircraft_id_map:
if pair[1] < minimum[1]:
minimum = pair
self._aircraft_id_map.pop(minimum[0])
# Finally return the new pair
return self._aircraft_id_count
def output(self, msg):
sbs1_msg = self.parse(msg)
@ -52,68 +77,126 @@ class modes_output_sbs1(modes_parse.modes_parse):
except socket.error:
pass
def __del__(self):
self._s.close()
def current_time(self):
timenow = datetime.now()
return [timenow.strftime("%Y/%m/%d"), timenow.strftime("%H:%M:%S.%f")[0:-3]]
def decode_fs(self, fs):
if fs == 0:
return "0,0,0,0"
elif fs == 1:
return "0,0,0,1"
elif fs == 2:
return "1,0,0,0"
elif fs == 3:
return "1,0,0,1"
elif fs == 4:
return "1,0,0,"
elif fs == 5:
return "0,0,0,"
else:
return ",,,"
def parse(self, message):
#assembles a SBS-1-style output string from the received message
#this version ignores anything that isn't Type 17 for now, because we just don't care
[msgtype, shortdata, longdata, parity, ecc, reference, time_secs, time_frac] = message.split()
[msgtype, shortdata, longdata, parity, ecc, reference, timestamp] = message.split()
shortdata = long(shortdata, 16)
longdata = long(longdata, 16)
parity = long(parity, 16)
ecc = long(ecc, 16)
# reference = float(reference)
msgtype = int(msgtype)
outmsg = None
if msgtype == 17:
outmsg = self.pp17(shortdata, longdata, parity, ecc)
if msgtype == 0:
outmsg = self.pp0(shortdata, parity, ecc)
elif msgtype == 4:
outmsg = self.pp4(shortdata, parity, ecc)
elif msgtype == 5:
outmsg = self.pp5(shortdata, parity, ecc)
elif msgtype == 11:
outmsg = self.pp11(shortdata, parity, ecc)
elif msgtype == 17:
outmsg = self.pp17(shortdata, longdata, parity, ecc)
return outmsg
def pp0(self, shortdata, parity, ecc):
[datestr, timestr] = self.current_time()
[vs, cc, sl, ri, altitude] = self.parse0(shortdata, parity, ecc)
aircraft_id = self.get_aircraft_id(ecc)
retstr = "MSG,7,0,%i,%X,%i,%s,%s,%s,%s,,%s,,,,,,,,,," % (aircraft_id, ecc, aircraft_id+100, datestr, timestr, datestr, timestr, altitude)
if vs:
retstr += "1\n"
else:
retstr += "0\n"
return retstr
def pp4(self, shortdata, parity, ecc):
[datestr, timestr] = self.current_time()
[fs, dr, um, altitude] = self.parse4(shortdata, parity, ecc)
aircraft_id = self.get_aircraft_id(ecc)
retstr = "MSG,5,0,%i,%X,%i,%s,%s,%s,%s,,%s,,,,,,," % (aircraft_id, ecc, aircraft_id+100, datestr, timestr, datestr, timestr, altitude)
return retstr + self.decode_fs(fs) + "\n"
def pp5(self, shortdata, parity, ecc):
# I'm not sure what to do with the identiifcation shortdata & 0x1FFF
[datestr, timestr] = self.current_time()
[fs, dr, um] = self.parse5(shortdata, parity, ecc)
aircraft_id = self.get_aircraft_id(ecc)
retstr = "MSG,6,0,%i,%X,%i,%s,%s,%s,%s,,,,,,,,," % (aircraft_id, ecc, aircraft_id+100, datestr, timestr, datestr, timestr)
return retstr + self.decode_fs(fs) + "\n"
def pp11(self, shortdata, parity, ecc):
[datestr, timestr] = self.current_time()
[icao24, interrogator, ca] = self.parse11(shortdata, parity, ecc)
aircraft_id = self.get_aircraft_id(icao24)
return "MSG,8,0,%i,%X,%i,%s,%s,%s,%s,,,,,,,,,,,,\n" % (aircraft_id, icao24, aircraft_id+100, datestr, timestr, datestr, timestr)
def pp17(self, shortdata, longdata, parity, ecc):
icao24 = shortdata & 0xFFFFFF
icao24 = shortdata & 0xFFFFFF
aircraft_id = self.get_aircraft_id(icao24)
subtype = (longdata >> 51) & 0x1F
retstr = None
timenow = datetime.now()
datestr = timenow.strftime("%Y/%m/%d")
timestr = timenow.strftime("%H:%M:%S.000") #we'll get better timestamps later, hopefully with actual VRT time in them
#we'll get better timestamps later, hopefully with actual VRT time
#in them
[datestr, timestr] = self.current_time()
if subtype == 4:
if subtype >= 1 and subtype <= 4:
# Aircraft Identification
msg = self.parseBDS08(shortdata, longdata, parity, ecc)
retstr = "MSG,1,0,0,%X,0,%s,%s,%s,%s,%s,,,,,,,,,,,\n" % (icao24, datestr, timestr, datestr, timestr, msg)
retstr = "MSG,1,0,%i,%X,%i,%s,%s,%s,%s,%s,,,,,,,,,,,\n" % (aircraft_id, icao24, aircraft_id+100, datestr, timestr, datestr, timestr, msg)
elif subtype >= 5 and subtype <= 8:
# Surface position measurement
[altitude, decoded_lat, decoded_lon, rnge, bearing] = self.parseBDS06(shortdata, longdata, parity, ecc)
if decoded_lat is None: #no unambiguously valid position available
retstr = None
else:
retstr = "MSG,3,0,0,%X,0,%s,%s,%s,%s,,%i,,,%.5f,%.5f,,,,0,0,0\n" % (icao24, datestr, timestr, datestr, timestr, altitude, decoded_lat, decoded_lon)
retstr = "MSG,2,0,%i,%X,%i,%s,%s,%s,%s,,%i,,,%.5f,%.5f,,,,0,0,0\n" % (aircraft_id, icao24, aircraft_id+100, datestr, timestr, datestr, timestr, altitude, decoded_lat, decoded_lon)
elif subtype >= 9 and subtype <= 18 and subtype != 15: #i'm eliminating type 15 records because they don't appear to be valid position reports.
elif subtype >= 9 and subtype <= 18 and subtype != 15:
# Airborne position measurements
# WRONG (rnge, bearing), is this still true?
# i'm eliminating type 15 records because they don't appear to be
# valid position reports.
[altitude, decoded_lat, decoded_lon, rnge, bearing] = self.parseBDS05(shortdata, longdata, parity, ecc)
if decoded_lat is None: #no unambiguously valid position available
retstr = None
else:
retstr = "MSG,3,0,0,%X,0,%s,%s,%s,%s,,%i,,,%.5f,%.5f,,,,0,0,0\n" % (icao24, datestr, timestr, datestr, timestr, altitude, decoded_lat, decoded_lon)
retstr = "MSG,3,0,%i,%X,%i,%s,%s,%s,%s,,%i,,,%.5f,%.5f,,,,0,0,0\n" % (aircraft_id, icao24, aircraft_id+100, datestr, timestr, datestr, timestr, altitude, decoded_lat, decoded_lon)
elif subtype == 19:
# Airborne velocity measurements
# WRONG (heading, vert_spd), Is this still true?
subsubtype = (longdata >> 48) & 0x07
if subsubtype == 0:
[velocity, heading, vert_spd] = self.parseBDS09_0(shortdata, longdata, parity, ecc)
retstr = "MSG,4,0,0,%X,0,%s,%s,%s,%s,,,%.1f,%.1f,,,%i,,,,,\n" % (icao24, datestr, timestr, datestr, timestr, velocity, heading, vert_spd)
retstr = "MSG,4,0,%i,%X,%i,%s,%s,%s,%s,,,%.1f,%.1f,,,%i,,,,,\n" % (aircraft_id, icao24, aircraft_id+100, datestr, timestr, datestr, timestr, velocity, heading, vert_spd)
elif subsubtype == 1:
[velocity, heading, vert_spd] = self.parseBDS09_1(shortdata, longdata, parity, ecc)
retstr = "MSG,4,0,0,%X,0,%s,%s,%s,%s,,,%.1f,%.1f,,,%i,,,,,\n" % (icao24, datestr, timestr, datestr, timestr, velocity, heading, vert_spd)
#else:
#print "debug (modes_sbs1): unknown subtype %i with data %x %x %x\n" % (subtype, shortdata, longdata, parity,)
retstr = "MSG,4,0,%i,%X,%i,%s,%s,%s,%s,,,%.1f,%.1f,,,%i,,,,,\n" % (aircraft_id, icao24, aircraft_id+100, datestr, timestr, datestr, timestr, velocity, heading, vert_spd)
return retstr