def message(self, msg):
# Printout of statistics
if self.signal_hup == 1:
self.logstats()
self.signal_hup = 0
ret_dict = {}
ret_dict['ret'] = 0
ret_dict['type'] = ""
self.msgs_curr_total = self.msgs_curr_total + 1
if len(msg) == 26 or len(msg) == 40:
# Some version of dump1090 have the 12 first characters used w/
# some date (timestamp ?). E.g. sdbr245 feeding flightradar24.
# Strip 12 first characters.
msg = msg[12:]
if len(msg) < 28: # Message length 112 bits
self.msgs_curr_short = self.msgs_curr_short + 1
else:
self.msgs_curr_len28 = self.msgs_curr_len28 + 1
ret_dict['crc'] = self.check_msg(msg)
if ret_dict['crc']:
self.parity_check_ok = self.parity_check_ok + 1
else:
self.parity_check_ko = self.parity_check_ko + 1
# Do not manage messages with bad CRC
if ret_dict['crc'] is not True:
raise ValueError("CrcKO")
dfmt = common.df(msg)
ret_dict['dfmt'] = dfmt
self.df[dfmt] = self.df[dfmt] + 1
ret_dict['ic'] = common.icao(msg)
if dfmt in [17, 18]: # Downlink format 17 or 18
tc = common.typecode(msg)
ret_dict['tc'] = tc
self.tc[tc] = self.tc[tc] + 1
lat_ref = float(self.params["lat"])
long_ref = float(self.params["long"])
if tc == 4: # Aircraft identification
self.msgs_discovered = self.msgs_discovered + 1
ret_dict['type'] = "CS"
ret_dict['cs'] = adsb.callsign(msg)
ca = adsb_ca(msg)
ret_dict['ca'] = ca_msg[ca]
self.ca[ca] = self.ca[ca] + 1
elif 9 <= tc <= 18:
self.msgs_discovered = self.msgs_discovered + 1
ret_dict['type'] = "LB"
ret_dict['altb'] = adsb.altitude(msg)
(lat, long) = adsb.position_with_ref(msg, lat_ref, long_ref)
ret_dict['lat'] = lat
ret_dict['long'] = long
elif tc == 19:
self.msgs_discovered = self.msgs_discovered + 1
ret_dict['type'] = "VH"
_dict = adsb.velocity(msg)
if _dict is None:
raise ValueError("AdsbVelocity")
(ret_dict['speed'], ret_dict['head'], ret_dict['rocd'],
var) = _dict
if ret_dict['head'] is None:
raise ValueError("AdsbHeading")
if ret_dict['rocd'] is None:
raise ValueError("AdsbRocd")
elif 20 <= tc <= 22:
self.msgs_discovered = self.msgs_discovered + 1
ret_dict['type'] = "LG"
ret_dict['altg'] = adsb.altitude(msg)
(lat, long) = adsb.position_with_ref(msg, lat_ref, long_ref)
ret_dict['lat'] = lat
ret_dict['long'] = long
elif dfmt in [5, 21]:
self.msgs_discovered = self.msgs_discovered + 1
ret_dict['type'] = "SQ"
ret_dict['sq'] = common.idcode(msg)
if dfmt in [0, 4, 16, 20]:
self.msgs_discovered = self.msgs_discovered + 1
ret_dict['type'] = "AL"
_alt = common.altcode(msg)
alt = _alt if _alt is not None else 0
ret_dict['alt'] = alt
return ret_dict
def test_adsb_position_with_ref():
pos = adsb.position_with_ref("8D40058B58C901375147EFD09357", 49.0, 6.0)
assert pos == (49.82410, 6.06785)
pos = adsb.position_with_ref("8FC8200A3AB8F5F893096B000000", -43.5, 172.5)
assert pos == (-43.48564, 172.53942)
def _parse(self, msg_ascii):
if not msg_ascii or msg_ascii[0] != '*':
raise ValueError
msg_hex = msg_ascii[1:].split(';', 1)[0]
try:
icao = adsb.icao(msg_hex).lower()
downlink_format = df(msg_hex)
type_code = adsb.typecode(msg_hex)
except:
raise ValueError
# version 0 is assumed, so populate it on initialisation
ac_data = self.positions.get(icao, {"version": 0})
if downlink_format == 17 or downlink_format == 18:
# An aircraft airborne position message has downlink format 17 (or 18) with
# type code from 9 to 18 (baro altitude) or 20 to 22 (GNSS altitude)
# ref https://mode-s.org/decode/adsb/airborne-position.html
if ac_data.get("version", None) == 1 and ac_data.get("nic_s", None):
ac_data["nic"] = adsb.nic_v1(msg_hex, ac_data["nic_s"])
if (type_code >= 1 and type_code <= 4):
# Slightly normalise the callsign - it's supposed to only be [0-9A-Z]
# with space padding. PyModeS uses _ padding, which I think is an older
# version of the spec.
ac_data["callsign"] = adsb.callsign(msg_hex).upper().replace("_", " ")[:8]
ac_data["emitter_category"] = adsb.category(msg_hex)
elif (type_code >= 9 and type_code <= 18) or (type_code >= 20 and type_code <= 22):
nuc_p = None
if ac_data.get("version", None) == 0:
# In ADSB version 0, the type code encodes the nuc_p (navigational
# uncertianty category - position) value via this magic lookup table
nuc_p_lookup = {
9: 9,
10: 8,
11: 7,
12: 6,
13: 5,
14: 4,
15: 3,
16: 2,
17: 1,
18: 0,
20: 9,
21: 8,
22: 0,
}
ac_data["nuc_p"] = nuc_p_lookup.get(type_code, None)
elif ac_data.get("version", None) == 2:
ac_data["nic_b"] = adsb.nic_b(msg_hex)
if ac_data.get("version", None) == 2 and "nic_a" in ac_data.keys() and "nic_c" in ac_data.keys():
nic_a = ac_data["nic_a"]
nic_c = ac_data["nic_c"]
ac_data["nic"] = adsb.nic_v2(msg_hex, nic_a, nic_c)
# Aircraft position
if not self.gps.is_fresh():
#print("aircraft: not updating {0} df={1} tc={2} as my GPS position is unknown ({3})".format(icao, downlink_format, type_code, msg_hex))
raise ValueError
# Use the known location of the receiver to calculate the aircraft position
# from one messsage
try:
my_latitude, my_longitude = self.gps.position()
except NoFixError:
# For testing
my_latitude, my_longitude = (51.519559, -0.114227)
# a rare race condition
#raise ValueError
ac_lat, ac_lon = adsb.position_with_ref(msg_hex, my_latitude, my_longitude)
#print("aircraft: update {0} df={1} tc={2} {3}, {4} ({5})".format(icao, downlink_format, type_code, ac_lat, ac_lon, msg_hex))
ac_data["lat"] = ac_lat
ac_data["lon"] = ac_lon
elif type_code == 19:
# From the docs: returns speed (kt) ground track or heading (degree),
# rate of climb/descent (ft/min), speed type (‘GS’ for ground speed,
# ‘AS’ for airspeed), direction source (‘true_north’ for ground track /
# true north as refrence, ‘mag_north’ for magnetic north as reference),
# rate of climb/descent source (‘Baro’ for barometer, ‘GNSS’ for GNSS
# constellation).
if ac_data.get("version", None) == 1 or ac_data.get("version", None) == 2:
ac_data["nac_v"] = adsb.nac_v(msg_hex)
try:
(speed, track, climb, speed_source, track_source, climb_source) = adsb.velocity(msg_hex, rtn_sources=True)
ac_data["speed_h"] = speed
ac_data["track"] = track
ac_data["speed_v"] = climb
ac_data["speed_h_source"] = speed_source
ac_data["track_source"] = track_source
ac_data["speed_v_source"] = climb_source
except TypeError:
# adsb.velocity can return None
raise ValueError
elif type_code == 31:
# Operational status
version = adsb.version(msg_hex)
nic_s = adsb.nic_s(msg_hex)
# v0 nuc_p is determined by type_code above
if version == 1:
try:
# Is this the right place for nucp? The docs say yes, but one error
# I've received says 8d3c5ee6f81300000039283c21cf: Not a surface
# position message (5<TC<8), airborne position message (8<TC<19),
# or airborne position with GNSS height (20<TC<22)
nuc_p = adsb.nuc_p(msg_hex)
nuc_v = adsb.nuc_v(msg_hex)
except RuntimeError as e:
print("aircraft: error parsing v1 NUC: {}".format(e))
raise ValueError
ac_data["nic_s"] = nic_s
ac_data["nuc_p"] = nuc_p
ac_data["nuc_v"] = nuc_v
ac_data["nac_p"] = adsb.nac_p(msg_hex)
ac_data["sil"] = adsb.sil(msg_hex, version)
elif version == 2:
ac_data["nac_p"] = adsb.nac_p(msg_hex)
(nic_a, nic_c) = adsb.nic_a_c(msg_hex)
ac_data["nic_a"] = nic_a
ac_data["nic_c"] = nic_c
ac_data["sil"] = adsb.sil(msg_hex, version)
ac_data["version"] = version
ac_data["nic_s"] = nic_s
else:
raise ValueError
elif downlink_format == 4 or downlink_format == 20:
altitude = adsb_common.altcode(msg_hex)
ac_data["altitude"] = altitude
else:
# unsupported message
raise ValueError
ac_data["updated"] = datetime.now()
self.positions[icao] = ac_data