def decode_msg_24(bit_arr: bitarray) -> dict:
"""
Static Data Report
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_24_static_data_report
"""
get_int_from_data = partial(get_int, bit_arr)
data = {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_int_from_data(8, 38),
'partno': get_int_from_data(38, 40)
}
# Part A
if len(bit_arr) == 160:
d = {
'shipname': encode_bin_as_ascii6(bit_arr[40: 160])
}
# Part B
else:
d = {
'shiptype': ShipType(get_int_from_data(40, 48)),
'vendorid': encode_bin_as_ascii6(bit_arr[48: 66]),
'model': get_int_from_data(66, 70),
'serial': get_int_from_data(70, 90),
'callsign': encode_bin_as_ascii6(bit_arr[90: 132]),
'to_bow': get_int_from_data(132, 141),
'to_stern': get_int_from_data(141, 150),
'to_port': get_int_from_data(150, 156),
'to_starboard': get_int_from_data(156, 162),
'mothership_mmsi': get_int_from_data(132, 162)
}
data.update(d)
return data
def decode_msg_19(bit_arr: bitarray) -> dict:
"""
Extended Class B CS Position Report
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_19_extended_class_b_cs_position_report
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_int_from_data(8, 38),
'speed': get_int_from_data(46, 56) * 0.1,
'accuracy': bit_arr[56],
'lon': get_int_from_data(57, 85, signed=True) / 600000.0,
'lat': get_int_from_data(85, 112, signed=True) / 600000.0,
'course': get_int_from_data(112, 124) * 0.1,
'heading': get_int_from_data(124, 133),
'second': get_int_from_data(133, 139),
'regional': get_int_from_data(139, 143),
'shipname': encode_bin_as_ascii6(bit_arr[143:263]),
'shiptype': ShipType(get_int_from_data(263, 271)),
'to_bow': get_int_from_data(271, 280),
'to_stern': get_int_from_data(280, 289),
'to_port': get_int_from_data(289, 295),
'to_starboard': get_int_from_data(295, 301),
'epfd': EpfdType(get_int_from_data(301, 305)),
'raim': bit_arr[305],
'dte': bit_arr[306],
'assigned': bit_arr[307],
}
def decode_msg_5(bit_arr: bitarray.bitarray) -> Dict[str, Any]:
"""
Static and Voyage Related Data
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_5_static_and_voyage_related_data
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_int_from_data(8, 38),
'ais_version': get_int_from_data(38, 40),
'imo': get_int_from_data(40, 70),
'callsign': encode_bin_as_ascii6(bit_arr[70:112]),
'shipname': encode_bin_as_ascii6(bit_arr[112:232]),
'shiptype': ShipType(get_int_from_data(232, 240)),
'to_bow': get_int_from_data(240, 249),
'to_stern': get_int_from_data(249, 258),
'to_port': get_int_from_data(258, 264),
'to_starboard': get_int_from_data(264, 270),
'epfd': EpfdType(get_int_from_data(270, 274)),
'month': get_int_from_data(274, 278),
'day': get_int_from_data(278, 283),
'hour': get_int_from_data(283, 288),
'minute': get_int_from_data(288, 294),
'draught': get_int_from_data(294, 302) / 10.0,
'destination': encode_bin_as_ascii6(bit_arr[302:422]),
'dte': bit_arr[-2]
}
def test_ship_types(self):
self.assertEqual(ShipType(25), ShipType.WIG_Reserved)
self.assertEqual(ShipType(46), ShipType.HSC_Reserved)
self.assertEqual(ShipType(57), ShipType.SPARE)
self.assertEqual(ShipType(68), ShipType.Passenger_Reserved)
self.assertEqual(ShipType(78), ShipType.Cargo_Reserved)
self.assertEqual(ShipType(85), ShipType.Tanker_Reserved)
self.assertEqual(ShipType(96), ShipType.OtherType_Reserved)
self.assertEqual(ShipType(100), ShipType.NotAvailable)
def test_msg_type_19(self):
msg = NMEAMessage(b"!AIVDM,1,1,,B,C5N3SRgPEnJGEBT>NhWAwwo862PaLELTBJ:V00000000S0D:R220,0*0B").decode()
assert msg['type'] == 19
assert msg['mmsi'] == "367059850"
assert round(msg['speed'], 1) == 8.7
assert msg['accuracy'] == 0
assert round(msg['lat'], 2) == 29.54
assert round(msg['lon'], 2) == -88.81
assert round(msg['course'], 2) == 335.9
assert msg['heading'] == 511
assert msg['second'] == 46
assert msg['shipname'] == "CAPT.J.RIMES"
assert msg['shiptype'] == ShipType(70)
assert msg['to_bow'] == 5
assert msg['to_stern'] == 21
assert msg['to_port'] == 4
assert msg['to_starboard'] == 4
def decode_msg_23(bit_arr: bitarray.bitarray) -> typing.Dict:
"""
Group Assignment Command
Src: https://gpsd.gitlab.io/gpsd/AIVDM.html#_type_23_group_assignment_command
"""
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(8, 8),
'mmsi': get_int_from_data(8, 38),
'ne_lon': get_int_from_data(40, 58, signed=True) * 0.1,
'ne_lat': get_int_from_data(58, 75, signed=True) * 0.1,
'sw_lon': get_int_from_data(75, 93, signed=True) * 0.1,
'sw_lat': get_int_from_data(93, 110, signed=True) * 0.1,
'station_type': StationType(get_int_from_data(110, 114)),
'ship_type': ShipType(get_int_from_data(114, 122)),
'txrx': TransmitMode(get_int_from_data(144, 146)),
'interval': StationIntervals(get_int_from_data(146, 150)),
'quiet': get_int_from_data(150, 154),
}
def decode_msg_5(bit_arr: bitarray) -> dict:
get_int_from_data = partial(get_int, bit_arr)
return {
'type': get_int_from_data(0, 6),
'repeat': get_int_from_data(6, 8),
'mmsi': get_int_from_data(8, 38),
'ais_version': get_int_from_data(38, 40),
'imo': get_int_from_data(40, 70),
'callsign': encode_bin_as_ascii6(bit_arr[70:112]),
'shipname': encode_bin_as_ascii6(bit_arr[112:232]),
'shiptype': ShipType(get_int_from_data(232, 240)),
'to_bow': get_int_from_data(240, 249),
'to_stern': get_int_from_data(249, 258),
'to_port': get_int_from_data(258, 264),
'to_starboard': get_int_from_data(264, 270),
'epfd': EpfdType(get_int_from_data(270, 274)),
'month': get_int_from_data(274, 278),
'day': get_int_from_data(278, 283),
'hour': get_int_from_data(283, 288),
'minute': get_int_from_data(288, 294),
'draught': get_int_from_data(294, 302) / 10.0,
'destination': encode_bin_as_ascii6(bit_arr[302:422]),
'dte': bit_arr[-2]
}
