new release

Update bds20.py

README.rst

@@ -1,7 +1,7 @@
 The Python ADS-B/Mode-S Decoder
 ===============================
 
-PyModeS is a Python library designed to decode Mode-S (including ADS-B) message. It can be imported to your python project or used as a standalone tool to view and save live traffic data.
+PyModeS is a Python library designed to decode Mode-S (including ADS-B) messages. It can be imported to your python project or used as a standalone tool to view and save live traffic data.
 
 This is a project created by Junzi Sun, who works at `TU Delft <https://www.tudelft.nl/en/>`_, `Aerospace Engineering Faculty <https://www.tudelft.nl/en/ae/>`_, `CNS/ATM research group <http://cs.lr.tudelft.nl/atm/>`_. It is supported by many `contributors <https://github.com/junzis/pyModeS/graphs/contributors>`_ from different institutions.
 

pyModeS/c_common.pyx

@@ -25,7 +25,7 @@ cdef unsigned char int_to_char(unsigned char i):
 @cython.boundscheck(False)
 @cython.overflowcheck(False)
 cpdef str hex2bin(str hexstr):
-    """Convert a hexdecimal string to binary string, with zero fillings."""
+    """Convert a hexadecimal string to binary string, with zero fillings."""
     # num_of_bits = len(hexstr) * 4
     cdef hexbytes = bytes(hexstr.encode())
     cdef Py_ssize_t len_hexstr = PyBytes_GET_SIZE(hexbytes)
@@ -73,7 +73,7 @@ cpdef str bin2hex(str binstr):
 
 @cython.boundscheck(False)
 cpdef unsigned char df(str msg):
-    """Decode Downlink Format vaule, bits 1 to 5."""
+    """Decode Downlink Format value, bits 1 to 5."""
     cdef str dfbin = hex2bin(msg[:2])
     # return min(bin2int(dfbin[0:5]), 24)
     cdef long df = bin2int(dfbin[0:5])

pyModeS/decoder/__init__.py

@@ -22,7 +22,7 @@ def tell(msg: str) -> None:
         tc = common.typecode(msg)
         if 1 <= tc <= 4:  # callsign
             callsign = adsb.callsign(msg)
-            _print("Type", "Identitification and category")
+            _print("Type", "Identification and category")
             _print("Callsign:", callsign)
 
         if 5 <= tc <= 8:  # surface position
@@ -71,6 +71,68 @@ def tell(msg: str) -> None:
             _print("CPR Longitude", cprlon)
             _print("Altitude", alt, "feet")
 
+        if tc == 29: # target state and status
+            _print("Type", "Target State and Status")
+            subtype = common.bin2int((common.hex2bin(msg)[32:])[5:7])
+            _print("Subtype", subtype)
+            tcas_operational = adsb.tcas_operational(msg)
+            types = {0: "Not Engaged", 1: "Engaged"}
+            tcas_operational_types = {0: "Not Operational", 1: "Operational"}
+            if subtype == 0:
+                emergency_types = {
+                    0: "No emergency",
+                    1: "General emergency",
+                    2: "Lifeguard/medical emergency",
+                    3: "Minimum fuel",
+                    4: "No communications",
+                    5: "Unlawful interference",
+                    6: "Downed aircraft",
+                    7: "Reserved"
+                }
+                vertical_horizontal_types = {
+                    1: "Acquiring mode",
+                    2: "Capturing/Maintaining mode"
+                }
+                tcas_ra_types = {0: "Not active", 1: "Active"}
+                alt, alt_source, alt_ref = adsb.target_altitude(msg)
+                angle, angle_type, angle_source = adsb.target_angle(msg)
+                vertical_mode = adsb.vertical_mode(msg)
+                horizontal_mode = adsb.horizontal_mode(msg)
+                tcas_ra = adsb.tcas_ra(msg)
+                emergency_status = adsb.emergency_status(msg)
+                _print("Target altitude", alt, "feet")
+                _print("Altitude source", alt_source)
+                _print("Altitude reference", alt_ref)
+                _print("Angle", angle, "°")
+                _print("Angle Type", angle_type)
+                _print("Angle Source", angle_source)
+                _print("Vertical mode", vertical_horizontal_types[vertical_mode])
+                _print("Horizontal mode", vertical_horizontal_types[horizontal_mode])
+                _print("TCAS/ACAS", tcas_operational_types[tcas_operational])
+                _print("TCAS/ACAS RA", tcas_ra_types[tcas_ra])
+                _print("Emergency status", emergency_types[emergency_status])
+            else:
+                alt, alt_source = adsb.selected_altitude(msg)
+                baro = adsb.baro_pressure_setting(msg)
+                hdg = adsb.selected_heading(msg)
+                autopilot = adsb.autopilot(msg)
+                vnav = adsb.vnav_mode(msg)
+                alt_hold = adsb.altitude_hold_mode(msg)
+                app = adsb.approach_mode(msg)
+                lnav = adsb.lnav_mode(msg)
+                _print("Selected altitude", alt, "feet")
+                _print("Altitude source", alt_source)
+                _print("Barometric pressure setting", baro, "millibars")
+                _print("Selected Heading", hdg, "°")
+                if not(common.bin2int((common.hex2bin(msg)[32:])[46]) == 0):
+                    _print("Autopilot", types[autopilot])
+                    _print("VNAV mode", types[vnav])
+                    _print("Altitude hold mode", types[alt_hold])
+                    _print("Approach mode", types[app])
+                    _print("TCAS/ACAS", tcas_operational_types[tcas_operational])
+                    _print("LNAV mode", types[lnav])
+
+
     if df == 20:
         _print("Protocol", "Mode-S Comm-B altitude reply")
         _print("Altitude", common.altcode(msg), "feet")

pyModeS/decoder/adsb.py

@@ -29,6 +29,23 @@ 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_state, emergency_squawk
+from pyModeS.decoder.bds.bds62 import (
+    selected_altitude,
+    selected_heading,
+    target_altitude,
+    target_angle,
+    tcas_operational,
+    tcas_ra,
+    baro_pressure_setting,
+    vertical_mode,
+    horizontal_mode,
+    vnav_mode,
+    lnav_mode,
+    autopilot,
+    altitude_hold_mode,
+    approach_mode,
+    emergency_status
+)
 
 
 def df(msg):
@@ -92,7 +109,7 @@ def position_with_ref(msg, lat_ref, lon_ref):
     A reference position is required, which can be previously
     calculated location, ground station, or airport location.
     The function works with both airborne and surface position messages.
-    The reference position shall be with in 180NM (airborne) or 45NM (surface)
+    The reference position shall be within 180NM (airborne) or 45NM (surface)
     of the true position.
 
     Args:
@@ -146,15 +163,15 @@ def velocity(msg, source=False):
     Args:
         msg (str): 28 hexdigits string
         source (boolean): Include direction and vertical rate sources in return. Default to False.
-            If set to True, the function will return six value instead of four.
+            If set to True, the function will return six values instead of four.
 
     Returns:
-        int, float, int, string, [string], [string]: Four or six parameters, including:
+        (int, float, int, string, [string], [string]): Four or six parameters, including:
             - Speed (kt)
             - Angle (degree), either ground track or heading
             - Vertical rate (ft/min)
             - Speed type ('GS' for ground speed, 'AS' for airspeed)
-            - [Optional] Direction source ('TRUE_NORTH' or 'MAGENTIC_NORTH')
+            - [Optional] Direction source ('TRUE_NORTH' or 'MAGNETIC_NORTH')
             - [Optional] Vertical rate source ('BARO' or 'GNSS')
 
         For surface messages, vertical rate and its respective sources are set to None.
@@ -324,7 +341,7 @@ def nic_v2(msg, NICa, NICbc):
     Args:
         msg (str): 28 hexdigits string
         NICa (int or string): NIC supplement - A
-        NICbc (int or srting): NIC supplement - B or C
+        NICbc (int or string): NIC supplement - B or C
 
     Returns:
         int or string: Horizontal Radius of Containment

pyModeS/decoder/allcall.py

@@ -1,5 +1,5 @@
 """
-Decode all-call reply messages, with dowlink format 11
+Decode all-call reply messages, with downlink format 11
 """
 
 from pyModeS import common

pyModeS/decoder/bds/__init__.py

@@ -38,6 +38,7 @@ from pyModeS.decoder.bds import (
     bds50,
     bds53,
     bds60,
+    bds62
 )
 
 

pyModeS/decoder/bds/bds05.py

@@ -82,7 +82,7 @@ def airborne_position_with_ref(msg, lat_ref, lon_ref):
     """Decode airborne position with only one message,
     knowing reference nearby location, such as previously calculated location,
     ground station, or airport location, etc. The reference position shall
-    be with in 180NM of the true position.
+    be within 180NM of the true position.
 
     Args:
         msg (str): even message (28 hexdigits)

pyModeS/decoder/bds/bds06.py

@@ -1,7 +1,7 @@
 # ------------------------------------------
 #   BDS 0,6
 #   ADS-B TC=5-8
-#   Surface movment
+#   Surface movement
 # ------------------------------------------
 
 from pyModeS import common
@@ -86,7 +86,7 @@ def surface_position_with_ref(msg, lat_ref, lon_ref):
     """Decode surface position with only one message,
     knowing reference nearby location, such as previously calculated location,
     ground station, or airport location, etc. The reference position shall
-    be with in 45NM of the true position.
+    be within 45NM of the true position.
 
     Args:
         msg (str): even message (28 hexdigits)
@@ -133,7 +133,7 @@ def surface_velocity(msg, source=False):
     Args:
         msg (str): 28 hexdigits string
         source (boolean): Include direction and vertical rate sources in return. Default to False.
-            If set to True, the function will return six value instead of four.
+            If set to True, the function will return six values instead of four.
 
     Returns:
         int, float, int, string, [string], [string]: Four or six parameters, including:

pyModeS/decoder/bds/bds08.py

@@ -1,7 +1,7 @@
 # ------------------------------------------
 #   BDS 0,8
 #   ADS-B TC=1-4
-#   Aircraft identitification and category
+#   Aircraft identification and category
 # ------------------------------------------
 
 from pyModeS import common

pyModeS/decoder/bds/bds09.py

@@ -16,7 +16,7 @@ def airborne_velocity(msg, source=False):
     Args:
         msg (str): 28 hexdigits string
         source (boolean): Include direction and vertical rate sources in return. Default to False.
-            If set to True, the function will return six value instead of four.
+            If set to True, the function will return six values instead of four.
 
     Returns:
         int, float, int, string, [string], [string]: Four or six parameters, including:
@@ -65,8 +65,9 @@ def airborne_velocity(msg, source=False):
             trk = math.degrees(trk)  # convert to degrees
             trk = trk if trk >= 0 else trk + 360  # no negative val
 
+            trk_or_hdg = round(trk, 2)
+
         spd_type = "GS"
-        trk_or_hdg = round(trk, 2)
         dir_type = "TRUE_NORTH"
 
     else:

pyModeS/decoder/bds/bds17.py

@@ -45,7 +45,7 @@ def cap17(msg):
         msg (str): 28 hexdigits string
 
     Returns:
-        list: list of support BDS codes
+        list: list of supported BDS codes
     """
     allbds = [
         "05",

pyModeS/decoder/bds/bds20.py

@@ -24,9 +24,11 @@ def is20(msg):
     if d[0:8] != "00100000":
         return False
 
-    cs = cs20(msg)
+    # allow empty callsign
+    if common.bin2int(d[8:56]) == 0
+        return True
 
-    if "#" in cs:
+    if "#" in cs20(msg):
         return False
 
     return True

pyModeS/decoder/bds/bds44.py

@@ -142,7 +142,7 @@ def hum44(msg):
 
 
 def turb44(msg):
-    """Turblence.
+    """Turbulence.
 
     Args:
         msg (str): 28 hexdigits string

pyModeS/decoder/bds/bds60.py

@@ -158,7 +158,7 @@ def vr60baro(msg):
 
 
 def vr60ins(msg):
-    """Vertical rate measurd by onbard equiments (IRS, AHRS)
+    """Vertical rate measured by onboard equipment (IRS, AHRS)
 
     Args:
         msg (str): 28 hexdigits string

pyModeS/decoder/bds/bds61.py

@@ -77,7 +77,7 @@ def emergency_squawk(msg: str) -> str:
     msgbin = common.hex2bin(msg)
 
     # construct the 13 bits Mode A ID code
-    idcode = msgbin[43:49] + "0" + msgbin[49:55]
+    idcode = msgbin[43:56]
 
     squawk = common.squawk(idcode)
     return squawk

pyModeS/decoder/bds/bds62.py

@@ -0,0 +1,474 @@
+# ------------------------------------------
+#   BDS 6,2
+#   ADS-B TC=29
+#   Target State and Status
+# ------------------------------------------
+
+from pyModeS import common
+
+def selected_altitude(msg):
+    """Decode selected altitude.
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        int: Selected altitude (ft)
+        string: Source ('MCP/FCU' or 'FMS')
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        raise RuntimeError("%s: ADS-B version 1 target state and status message does not contain selected altitude, use target altitude instead" % msg)
+
+    alt = common.bin2int(mb[9:20])
+    alt = None if alt == 0 else (alt - 1) * 32
+    alt_source = "MCP/FCU" if int(mb[8]) == 0 else "FMS"
+
+    return alt, alt_source
+
+
+
+def target_altitude(msg):
+    """Decode target altitude.
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        int: Target altitude (ft)
+        string: Source ('MCP/FCU', 'Holding mode' or 'FMS/RNAV')
+        string: Altitude reference, either pressure altitude or barometric corrected altitude ('FL' or 'MSL')
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 1:
+        raise RuntimeError("%s: ADS-B version 2 target state and status message does not contain target altitude, use selected altitude instead" % msg)
+
+    alt_avail = common.bin2int(mb[7:9])
+    if alt_avail == 0:
+        return None
+    elif alt_avail == 1:
+        alt_source = "MCP/FCU"
+    elif alt_avail == 2:
+        alt_source = "Holding mode"
+    else:
+        alt_source = "FMS/RNAV"
+
+    alt_ref = "FL" if int(mb[9]) == 0 else "MSL"
+
+    alt = -1000 + common.bin2int(mb[15:25]) * 100
+
+    return alt, alt_source, alt_ref
+
+
+def vertical_mode(msg):
+    """Decode vertical mode.
+
+    Value   Meaning
+    -----   -----------------------
+    1       "Acquiring" mode
+    2       "Capturing" or "Maintaining" mode
+    3       Reserved
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        int: Vertical mode
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 1:
+        raise RuntimeError("%s: ADS-B version 2 target state and status message does not contain vertical mode, use vnav mode instead" % msg)
+
+    vertical_mode = common.bin2int(mb[13:15])
+    if vertical_mode == 0:
+        return None
+
+    return vertical_mode
+
+
+def horizontal_mode(msg):
+    """Decode horizontal mode.
+
+    Value   Meaning
+    -----   -----------------------
+    1       "Acquiring" mode
+    2       "Capturing" or "Maintaining" mode
+    3       Reserved
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        int: Horizontal mode
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 1:
+        raise RuntimeError("%s: ADS-B version 2 target state and status message does not contain horizontal mode, use lnav mode instead" % msg)
+
+    horizontal_mode = common.bin2int(mb[25:27])
+    if horizontal_mode == 0:
+        return None
+
+    return horizontal_mode
+
+
+def selected_heading(msg):
+    """Decode selected heading.
+
+    Args:
+        msg (str): 28 bytes hexadecimal message string
+
+    Returns:
+        float: Selected heading (degree)
+    
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        raise RuntimeError("%s: ADS-B version 1 target state and status message does not contain selected heading, use target angle instead" % msg)
+
+    if int(mb[29]) == 0:
+        hdg = None
+    else:
+        hdg_sign = int(mb[30])
+        hdg = (hdg_sign+1) * common.bin2int(mb[31:39]) * (180/256)
+        hdg = round(hdg, 2)
+
+    return hdg
+
+
+def target_angle(msg):
+    """Decode target heading/track angle.
+
+    Args:
+        msg (str): 28 bytes hexadecimal message string
+
+    Returns:
+        int: Target angle (degree)
+        string: Angle type ('Heading' or 'Track')
+        string: Source ('MCP/FCU', 'Autopilot Mode' or 'FMS/RNAV')
+    
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 1:
+        raise RuntimeError("%s: ADS-B version 2 target state and status message does not contain target angle, use selected heading instead" % msg)
+
+    angle_avail = common.bin2int(mb[25:27])
+    if angle_avail == 0:
+        angle = None
+    else:
+        angle = common.bin2int(mb[27:36])
+
+        if angle_avail == 1:
+            angle_source = "MCP/FCU"
+        elif angle_avail == 2:
+            angle_source = "Autopilot mode"
+        else:
+            angle_source = "FMS/RNAV"
+        
+        angle_type = "Heading" if int(mb[36]) else "Track"
+
+    return angle, angle_type, angle_source
+
+
+def baro_pressure_setting(msg):
+    """Decode barometric pressure setting.
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        float: Barometric pressure setting (millibars)
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        raise RuntimeError("%s: ADS-B version 1 target state and status message does not contain barometric pressure setting" % msg)
+
+    baro = common.bin2int(mb[20:29])
+    baro = None if baro == 0 else 800 + (baro - 1) * 0.8
+    baro = round(baro, 1)
+
+    return baro
+
+def autopilot(msg) -> bool:
+    """Decode autopilot engagement.
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        bool: Autopilot engaged
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        raise RuntimeError("%s: ADS-B version 1 target state and status message does not contain autopilot engagement" % msg)
+
+    if int(mb[46]) == 0:
+        return None
+
+    autopilot = True if int(mb[47]) == 1 else False
+
+    return autopilot
+
+def vnav_mode(msg) -> bool:
+    """Decode VNAV mode.
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        bool: VNAV mode engaged
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        raise RuntimeError("%s: ADS-B version 1 target state and status message does not contain vnav mode, use vertical mode instead" % msg)
+
+    if int(mb[46]) == 0:
+        return None
+
+    vnav_mode = True if int(mb[48]) == 1 else False
+
+    return vnav_mode
+
+
+def altitude_hold_mode(msg) -> bool:
+    """Decode altitude hold mode.
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        bool: Altitude hold mode engaged
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        raise RuntimeError("%s: ADS-B version 1 target state and status message does not contain altitude hold mode" % msg)
+
+    if int(mb[46]) == 0:
+        return None
+
+    alt_hold_mode = True if int(mb[49]) == 1 else False
+
+    return alt_hold_mode
+
+
+
+def approach_mode(msg) -> bool:
+    """Decode approach mode.
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        bool: Approach mode engaged
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        raise RuntimeError("%s: ADS-B version 1 target state and status message does not contain approach mode" % msg)
+
+    if int(mb[46]) == 0:
+        return None
+
+    app_mode = True if int(mb[51]) == 1 else False
+
+    return app_mode
+
+
+def lnav_mode(msg) -> bool:
+    """Decode LNAV mode.
+
+    Args:
+        msg (str): 28 hexdigits string
+
+    Returns:
+        bool: LNAV mode engaged
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        raise RuntimeError("%s: ADS-B version 1 target state and status message does not contain lnav mode, use horizontal mode instead" % msg)
+
+    if int(mb[46]) == 0:
+        return None
+
+    lnav_mode = True if int(mb[53]) == 1 else False
+
+    return lnav_mode
+
+
+def tcas_operational(msg) -> bool:
+    """Decode TCAS/ACAS operational.
+
+    Args:
+        msg (str): 28 bytes hexadecimal message string
+
+    Returns:
+        bool: TCAS/ACAS operational
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 0:
+        tcas = True if int(mb[51]) == 0 else False
+    else:
+        tcas = True if int(mb[52]) == 1 else False
+
+    return tcas
+
+def tcas_ra(msg) -> bool:
+    """Decode TCAS/ACAS Resolution advisory.
+
+    Args:
+        msg (str): 28 bytes hexadecimal message string
+
+    Returns:
+        bool: TCAS/ACAS Resolution advisory active
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 1:
+        raise RuntimeError("%s: ADS-B version 2 target state and status message does not contain TCAS/ACAS RA" % msg)
+
+    tcas_ra = True if int(mb[52]) == 1 else False
+
+    return tcas_ra
+
+
+def emergency_status(msg) -> int:
+    """Decode aircraft emergency status.
+
+    Value   Meaning
+    -----   -----------------------
+    0       No emergency
+    1       General emergency
+    2       Lifeguard/medical emergency
+    3       Minimum fuel
+    4       No communications
+    5       Unlawful interference
+    6       Downed aircraft
+    7       Reserved
+
+    Args:
+        msg (str): 28 bytes hexadecimal message string
+
+    Returns:
+        int: Emergency status
+
+    """
+
+    if common.typecode(msg) != 29:
+        raise RuntimeError("%s: Not a target state and status message, expecting TC=29" % msg)
+
+    mb = common.hex2bin(msg)[32:]
+
+    subtype = common.bin2int(mb[5:7])
+
+    if subtype == 1:
+        raise RuntimeError("%s: ADS-B version 2 target state and status message does not contain emergency status" % msg)
+
+    return common.bin2int(mb[53:56])

pyModeS/decoder/commb.py

@@ -36,3 +36,5 @@ from pyModeS.decoder.bds.bds60 import *
 # MRAR and MHR
 from pyModeS.decoder.bds.bds44 import *
 from pyModeS.decoder.bds.bds45 import *
+
+from pyModeS.py_common import fs, dr, um

pyModeS/decoder/surv.py

@@ -3,6 +3,7 @@ Decode short roll call surveillance replies, with downlink format 4 or 5
 """
 
 from pyModeS import common
+from pyModeS.py_common import fs, dr, um
 
 
 def _checkdf(func):
@@ -19,91 +20,6 @@ def _checkdf(func):
     return wrapper
 
 
-@_checkdf
-def fs(msg):
-    """Decode flight status.
-
-    Args:
-        msg (str): 14 hexdigits string
-    Returns:
-        int, str: flight status, description
-
-    """
-    msgbin = common.hex2bin(msg)
-    fs = common.bin2int(msgbin[5:8])
-    text = None
-
-    if fs == 0:
-        text = "no alert, no SPI, aircraft is airborne"
-    elif fs == 1:
-        text = "no alert, no SPI, aircraft is on-ground"
-    elif fs == 2:
-        text = "alert, no SPI, aircraft is airborne"
-    elif fs == 3:
-        text = "alert, no SPI, aircraft is on-ground"
-    elif fs == 4:
-        text = "alert, SPI, aircraft is airborne or on-ground"
-    elif fs == 5:
-        text = "no alert, SPI, aircraft is airborne or on-ground"
-
-    return fs, text
-
-
-@_checkdf
-def dr(msg):
-    """Decode downlink request.
-
-    Args:
-        msg (str): 14 hexdigits string
-    Returns:
-        int, str: downlink request, description
-
-    """
-    msgbin = common.hex2bin(msg)
-    dr = common.bin2int(msgbin[8:13])
-
-    text = None
-
-    if dr == 0:
-        text = "no downlink request"
-    elif dr == 1:
-        text = "request to send Comm-B message"
-    elif dr == 4:
-        text = "Comm-B broadcast 1 available"
-    elif dr == 5:
-        text = "Comm-B broadcast 2 available"
-    elif dr >= 16:
-        text = "ELM downlink segments available: {}".format(dr - 15)
-
-    return dr, text
-
-
-@_checkdf
-def um(msg):
-    """Decode utility message.
-
-    Utility message contains interrogator identifier and reservation type.
-
-    Args:
-        msg (str): 14 hexdigits string
-    Returns:
-        int, str: interrogator identifier code that triggered the reply, and
-        reservation type made by the interrogator
-    """
-    msgbin = common.hex2bin(msg)
-    iis = common.bin2int(msgbin[13:17])
-    ids = common.bin2int(msgbin[17:19])
-    if ids == 0:
-        ids_text = None
-    if ids == 1:
-        ids_text = "Comm-B interrogator identifier code"
-    if ids == 2:
-        ids_text = "Comm-C interrogator identifier code"
-    if ids == 3:
-        ids_text = "Comm-D interrogator identifier code"
-    return iis, ids, ids_text
-
-
 @_checkdf
 def altitude(msg):
     """Decode altitude.

pyModeS/decoder/uplink.py

@@ -43,12 +43,12 @@ def bds(msg):
                 RRS = mbytes[2] & 0x0F
                 BDS2 = RRS
             elif di == 3:
-                RRS = ((mbytes[2] & 0x1) << 4) | ((mbytes[3] & 0xE0) >> 5)
+                RRS = ((mbytes[2] & 0x1) << 3) | ((mbytes[3] & 0xE0) >> 5)
                 BDS2 = RRS
             else:
                 BDS2 = 0 # for other values of DI, the BDS2 is assumed 0 (as per ICAO Annex 10 Vol IV)
 
-            return str(BDS1) + str(BDS2)
+            return str(format(BDS1,"X")) + str(format(BDS2,"X"))
         else:
             return None
     else:
@@ -154,8 +154,7 @@ def uplink_fields(msg):
     di = ""
     RR = ""
     RRS = ""
-    BDS1 = ""
-    BDS2 = ""
+    BDS = ""
     if uf(msg) == 11:
         
        
@@ -208,8 +207,11 @@ def uplink_fields(msg):
             # SI
             SI = (mbytes[2] >> 2) & 0x3F
             IC = "SI" + str(SI)
-            RRS = ((mbytes[2] & 0x1) << 4) | ((mbytes[3] & 0xE0) >> 5)
+            RRS = ((mbytes[2] & 0x1) << 3) | ((mbytes[3] & 0xE0) >> 5)
             BDS2 = RRS
+        if RR > 15:
+            BDS = str(format(BDS1,"X")) + str(format(BDS2,"X"))
+            
     return {
         "DI": di,
         "IC": IC,
@@ -217,5 +219,5 @@ def uplink_fields(msg):
         "PR": PR,
         "RR": RR,
         "RRS": RRS,
-        "BDS": str(BDS1) + str(BDS2),
+        "BDS": BDS,
     }

pyModeS/extra/rtlreader.py

@@ -7,7 +7,7 @@ try:
     import rtlsdr
 except:
     print("------------------------------------------------------------------------")
-    print("! Warining: pyrtlsdr not installed (required for using RTL-SDR devices) ")
+    print("! Warning: pyrtlsdr not installed (required for using RTL-SDR devices) !")
     print("------------------------------------------------------------------------")
 
 sampling_rate = 2e6

pyModeS/extra/tcpclient.py

@@ -32,7 +32,7 @@ class TcpClient(object):
         self.socket.connect("tcp://%s:%s" % (self.host, self.port))
 
     def stop(self):
-        self.socket.disconnect()
+        self.socket.close()
 
     def read_raw_buffer(self):
         """ Read raw ADS-B data type.
@@ -292,4 +292,7 @@ if __name__ == "__main__":
     port = int(sys.argv[2])
     datatype = sys.argv[3]
     client = TcpClient(host=host, port=port, datatype=datatype)
-    client.run()
+    try:
+        client.run()
+    finally:
+        client.stop()

pyModeS/py_common.py

@@ -5,14 +5,14 @@ from textwrap import wrap
 
 
 def hex2bin(hexstr: str) -> str:
-    """Convert a hexdecimal string to binary string, with zero fillings."""
+    """Convert a hexadecimal string to binary string, with zero fillings."""
     num_of_bits = len(hexstr) * 4
     binstr = bin(int(hexstr, 16))[2:].zfill(int(num_of_bits))
     return binstr
 
 
 def hex2int(hexstr: str) -> int:
-    """Convert a hexdecimal string to integer."""
+    """Convert a hexadecimal string to integer."""
     return int(hexstr, 16)
 
 
@@ -22,7 +22,7 @@ def bin2int(binstr: str) -> int:
 
 
 def bin2hex(binstr: str) -> str:
-    """Convert a binary string to hexdecimal string."""
+    """Convert a binary string to hexadecimal string."""
     return "{0:X}".format(int(binstr, 2))
 
 
@@ -404,3 +404,85 @@ def wrongstatus(data: str, sb: int, msb: int, lsb: int) -> bool:
             return True
 
     return False
+
+
+def fs(msg):
+    """Decode flight status for DF 4, 5, 20, and 21.
+
+    Args:
+        msg (str): 14 hexdigits string
+    Returns:
+        int, str: flight status, description
+
+    """
+    msgbin = hex2bin(msg)
+    fs = bin2int(msgbin[5:8])
+    text = None
+
+    if fs == 0:
+        text = "no alert, no SPI, aircraft is airborne"
+    elif fs == 1:
+        text = "no alert, no SPI, aircraft is on-ground"
+    elif fs == 2:
+        text = "alert, no SPI, aircraft is airborne"
+    elif fs == 3:
+        text = "alert, no SPI, aircraft is on-ground"
+    elif fs == 4:
+        text = "alert, SPI, aircraft is airborne or on-ground"
+    elif fs == 5:
+        text = "no alert, SPI, aircraft is airborne or on-ground"
+
+    return fs, text
+
+
+def dr(msg):
+    """Decode downlink request for DF 4, 5, 20, and 21.
+
+    Args:
+        msg (str): 14 hexdigits string
+    Returns:
+        int, str: downlink request, description
+
+    """
+    msgbin = hex2bin(msg)
+    dr = bin2int(msgbin[8:13])
+
+    text = None
+
+    if dr == 0:
+        text = "no downlink request"
+    elif dr == 1:
+        text = "request to send Comm-B message"
+    elif dr == 4:
+        text = "Comm-B broadcast 1 available"
+    elif dr == 5:
+        text = "Comm-B broadcast 2 available"
+    elif dr >= 16:
+        text = "ELM downlink segments available: {}".format(dr - 15)
+
+    return dr, text
+
+
+def um(msg):
+    """Decode utility message for DF 4, 5, 20, and 21.
+
+    Utility message contains interrogator identifier and reservation type.
+
+    Args:
+        msg (str): 14 hexdigits string
+    Returns:
+        int, str: interrogator identifier code that triggered the reply, and
+        reservation type made by the interrogator
+    """
+    msgbin = hex2bin(msg)
+    iis = bin2int(msgbin[13:17])
+    ids = bin2int(msgbin[17:19])
+    if ids == 0:
+        ids_text = None
+    if ids == 1:
+        ids_text = "Comm-B interrogator identifier code"
+    if ids == 2:
+        ids_text = "Comm-C interrogator identifier code"
+    if ids == 3:
+        ids_text = "Comm-D interrogator identifier code"
+    return iis, ids, ids_text

setup.py

@@ -27,7 +27,7 @@ with open(path.join(here, "README.rst"), encoding="utf-8") as f:
 
 details = dict(
     name="pyModeS",
-    version="2.9",
+    version="2.10",
     description="Python Mode-S and ADS-B Decoder",
     long_description=long_description,
     url="https://github.com/junzis/pyModeS",

tests/test_adsb.py

@@ -86,6 +86,20 @@ def test_adsb_emergency():
     assert adsb.emergency_squawk("8DA2C1B6E112B600000000760759") == "6615"
 
 
+def test_adsb_target_state_status():
+    sel_alt = adsb.selected_altitude("8DA05629EA21485CBF3F8CADAEEB")
+    assert sel_alt == (16992, "MCP/FCU")
+    assert adsb.baro_pressure_setting("8DA05629EA21485CBF3F8CADAEEB") == 1012.8
+    assert adsb.selected_heading("8DA05629EA21485CBF3F8CADAEEB")== 66.8
+    assert adsb.autopilot("8DA05629EA21485CBF3F8CADAEEB") == True
+    assert adsb.vnav_mode("8DA05629EA21485CBF3F8CADAEEB") == True
+    assert adsb.altitude_hold_mode("8DA05629EA21485CBF3F8CADAEEB") == False
+    assert adsb.approach_mode("8DA05629EA21485CBF3F8CADAEEB") == False
+    assert adsb.tcas_operational("8DA05629EA21485CBF3F8CADAEEB") == True
+    assert adsb.lnav_mode("8DA05629EA21485CBF3F8CADAEEB") == True
+    
+
+
 # def test_nic():
 #     assert adsb.nic('8D3C70A390AB11F55B8C57F65FE6') == 0
 #     assert adsb.nic('8DE1C9738A4A430B427D219C8225') == 1