Merge branch 'bds-61' of git://github.com/tuftedocelot/pyModeS into tuftedocelot-bds-61
This commit is contained in:
commit
9c660578ad
@ -28,6 +28,7 @@ from pyModeS.decoder.bds.bds06 import (
|
||||
)
|
||||
from pyModeS.decoder.bds.bds08 import category, callsign
|
||||
from pyModeS.decoder.bds.bds09 import airborne_velocity, altitude_diff
|
||||
from pyModeS.decoder.bds.bds61 import is_emergency, emergency, emergency_squawk
|
||||
|
||||
|
||||
def df(msg):
|
||||
|
98
pyModeS/decoder/bds/bds61.py
Normal file
98
pyModeS/decoder/bds/bds61.py
Normal file
@ -0,0 +1,98 @@
|
||||
# ------------------------------------------
|
||||
# BDS 6,1
|
||||
# ADS-B TC=28
|
||||
# Aircraft Airborne status
|
||||
# ------------------------------------------
|
||||
|
||||
from __future__ import absolute_import, print_function, division
|
||||
|
||||
from pyModeS import common
|
||||
|
||||
|
||||
def is_emergency(msg):
|
||||
"""
|
||||
Check if the aircraft is reporting an emergency
|
||||
Non-emergencies are either a subtype of zero (no information) or
|
||||
subtype of one and a value of zero (no emergency).
|
||||
Subtype = 2 indicates an ACAS RA broadcast, look in BDS 3,0
|
||||
:param msg:
|
||||
:return: if the aircraft has declared an emergency
|
||||
"""
|
||||
if common.typecode(msg) != 28:
|
||||
raise RuntimeError("%s: Not an airborne status message, expecting TC=28" % msg)
|
||||
|
||||
mb = common.hex2bin(msg)[32:]
|
||||
|
||||
subtype = common.bin2int(mb[5:8])
|
||||
emergency_state = common.bin2int(mb[8:11])
|
||||
|
||||
if subtype == 2:
|
||||
raise RuntimeError("%s: Emergency message is ACAS-RA, not implemented")
|
||||
|
||||
if subtype == 0:
|
||||
return False
|
||||
elif subtype == 1 and emergency_state == 0:
|
||||
return False
|
||||
else:
|
||||
return True
|
||||
|
||||
|
||||
def emergency(msg):
|
||||
"""
|
||||
Return the aircraft emergency
|
||||
|
||||
===== =======
|
||||
Value Meaning
|
||||
===== =======
|
||||
1 General emergency
|
||||
2 Lifeguard/Medical
|
||||
3 Minimum fuel
|
||||
4 No communications
|
||||
5 Unlawful communications
|
||||
6 Reserved
|
||||
7 Reserved
|
||||
:param msg:
|
||||
:return: If the aircraft has declared an emergency, the type
|
||||
"""
|
||||
if not is_emergency(msg):
|
||||
raise RuntimeError("%s: Aircraft not declared an emergency" % msg)
|
||||
else:
|
||||
mb = common.hex2bin(msg)[32:]
|
||||
|
||||
subtype = common.bin2int(mb[5:8])
|
||||
emergency_state = common.bin2int(mb[8:11])
|
||||
|
||||
return emergency_state
|
||||
|
||||
|
||||
def emergency_squawk(msg):
|
||||
"""
|
||||
Squawk code of the transmitting aircraft
|
||||
Emergency value 1 will be squawk 7700
|
||||
Emergency value 4 will be squawk 7600
|
||||
Emergency value 5 will be squawk 7500
|
||||
:param msg:
|
||||
:return: aircraft squawk code
|
||||
"""
|
||||
if common.typecode(msg) != 28:
|
||||
raise RuntimeError("%s: Not an airborne status message, expecting TC=28" % msg)
|
||||
|
||||
mb = common.hex2bin(msg)[32:]
|
||||
C1 = mb[11]
|
||||
A1 = mb[12]
|
||||
C2 = mb[13]
|
||||
A2 = mb[14]
|
||||
C4 = mb[15]
|
||||
A4 = mb[16]
|
||||
B1 = mb[17]
|
||||
D1 = mb[18]
|
||||
B2 = mb[19]
|
||||
D2 = mb[20]
|
||||
B4 = mb[21]
|
||||
D4 = mb[22]
|
||||
|
||||
byte1 = int(A4 + A2 + A1, 2)
|
||||
byte2 = int(B4 + B2 + B1, 2)
|
||||
byte3 = int(C4 + C2 + C1, 2)
|
||||
byte4 = int(D4 + D2 + D1, 2)
|
||||
return str(byte1) + str(byte2) + str(byte3) + str(byte4)
|
@ -80,6 +80,11 @@ def test_adsb_velocity():
|
||||
assert adsb.altitude_diff("8D485020994409940838175B284F") == 550
|
||||
|
||||
|
||||
def test_adsb_emergency():
|
||||
assert not adsb.is_emergency('8DA2C1B6E112B600000000760759')
|
||||
assert adsb.emergency_squawk('8DA2C1B6E112B600000000760759') == '6615'
|
||||
|
||||
|
||||
# def test_nic():
|
||||
# assert adsb.nic('8D3C70A390AB11F55B8C57F65FE6') == 0
|
||||
# assert adsb.nic('8DE1C9738A4A430B427D219C8225') == 1
|
||||
|
Loading…
Reference in New Issue
Block a user