def rotating1(bits):
rotatingbin = []
#Add a single bit offset so bits array index # matches documentation for readbility
bits = '0' + bits
##BIT 5-21 (159-175) Time of last encoded location
## update Ver 2.0
if bits[5:22] == '1' * 17:
time = 'UTC time is not available or the time is more than 24 hours old'
else:
time = Func.sec2utc(bits[5:22])
## endupdate
rotatingbin.append([
'159-175 (Rotating field 5-21)', bits[5:22],
'Time of last encoded location', time
])
##BIT 22-31 (176-185) Altitude of encoded location
altitude = Func.getaltitude(bits[22:32])
rotatingbin.append([
'176-185 (Rotating field 22-31)', bits[22:32],
'Altitude of encoded location:', altitude
])
##BIT 32-35 (186-189) Triggering event
try:
trigger = definitions.triggering_event[bits[32:36]]
except KeyError:
trigger = 'ERROR: Unknown trigger'
rotatingbin.append([
'186-189 (Rotating field 32-35)', bits[32:36], 'Triggering event',
trigger
])
##BIT 36-37 (190-191) GNSS Status
gnss = definitions.gnss_status[bits[36:38]]
rotatingbin.append(
['190-191 (Rotating field 36-37)', bits[36:38], 'GNSS status', gnss])
##BIT 38-39 (192-193) Remaining battery capacity
battery = definitions.inflight_battery[bits[38:40]]
rotatingbin.append([
'192-193 (Rotating field 38-39)', bits[38:40],
'Remaining battery capacity', battery
])
##BIT 40-48 (194-202) Spare
if Func.checkzeros(bits[40:]):
rotatingbin.append(
['194-202 (Rotating field 40-48)', bits[40:], 'Spare', 'OK'])
else:
rotatingbin.append([
'194-202 (Rotating field 40-48)', bits[40:], 'Spare',
'ERROR: Should be 0s'
])
return rotatingbin
def rotating3(bits):
rotatingbin = []
#Add a single bit offset so bits array index # matches documentation for readbility
bits = '0' + bits
##BIT 5-48 (159-202) As defined by national administrations
if Func.checkzeros(bits[5:]):
rotatingbin.append([
'159-202 (Rotating field 5-48)', bits[5:],
'As defined by national administrations', 'default'
])
else:
rotatingbin.append([
'159-202 (Rotating field 5-48)', bits[5:],
'As defined by national administrations', ''
])
return rotatingbin
def vesselIDfill(self, deduct_offset, bits):
self.vesselID = bits[0:3]
self.tablebin.append([
self.bitlabel(91, 93, deduct_offset), self.vesselID,
'Vessel ID Type',
Func.getVesselid(self.vesselID)
])
##############################################
# Vessel 0: No aircraft or maritime identity #
##############################################
if self.vesselID == '000':
if Func.checkzeros(bits[3:47]):
self.tablebin.append([
self.bitlabel(94, 137, deduct_offset), bits[3:47],
'Vessel ID type is none', 'All 0 - OK'
])
else:
self.tablebin.append([
self.bitlabel(94, 137, deduct_offset), bits[3:47],
'Vessel ID type is none', 'Error! Should be all 0'
])
###########################
# Vessel 1: Maritime MMSI #
###########################
elif self.vesselID == '001':
self.mmsi = Func.bin2dec(bits[3:33])
if self.mmsi == 111111:
self.tablebin.append([
self.bitlabel(94, 123, deduct_offset), bits[3:33], 'MMSI:',
'No MMSI available'
])
else:
self.mmsi_string = str(self.mmsi).zfill(9)
self.tablebin.append([
self.bitlabel(94, 123, deduct_offset), bits[3:33],
'Unique ship station identity MIDxxYYYY:', self.mmsi_string
])
self.mmsi_country = Func.countryname(int(
self.mmsi_string[0:3]))
self.tablebin.append([
'', '', 'Flag state of vessel:',
self.mmsi_string[0:3] + ' ' + self.mmsi_country
])
self.tablebin.append(
['', '', 'Unique vessel number', self.mmsi_string[3:]])
self.epirb_ais = Func.bin2dec(bits[33:47])
if self.epirb_ais == 10922:
self.tablebin.append([
self.bitlabel(124, 137, deduct_offset), bits[33:47],
'EPIRB-AIS System Identity:', 'No EPIRB-AIS System'
])
else:
self.epirb_ais_str = str(self.epirb_ais).zfill(4)
self.epirb_ais_str = '974xx' + self.epirb_ais_str
self.tablebin.append([
self.bitlabel(124, 137, deduct_offset), bits[33:47],
'EPIRB-AIS System Identity', self.epirb_ais_str
])
#############################
# Vessel 2: Radio Call Sign #
#############################
elif self.vesselID == '010':
self.callsign = Func.getCallsign(bits[3:45])
self.tablebin.append([
self.bitlabel(94, 135, deduct_offset), bits[3:45],
'Radio Callsign', self.callsign
])
if Func.checkzeros(bits[45:47]):
status_check = 'OK'
else:
status_check = 'ERROR'
self.tablebin.append([
self.bitlabel(136, 137, deduct_offset), bits[45:47],
'Spare should be 0', status_check
])
#########################################################
# Vessel 3: Aricraft Registration Marking (Tail Number) #
#########################################################
elif self.vesselID == '011':
self.tailnum = Func.getTailNum(bits[3:45])
self.tablebin.append([
self.bitlabel(94, 135, deduct_offset), bits[3:45],
'Aircraft Registration Marking:', self.tailnum
])
if bits[45:47] == '00':
status_check = 'OK'
else:
status_check = 'ERROR'
self.tablebin.append([
self.bitlabel(136, 137, deduct_offset), bits[45:47],
'Spare should be 0', status_check
])
##############################################
# Vessel 4: Aircraft Aviation 24 Bit Address #
##############################################
elif self.vesselID == '100':
self.aviationBitAddress = Func.bin2dec(bits[3:27])
self.tablebin.append([
self.bitlabel(94, 117, deduct_offset), bits[3:27],
'Aviation 24 bit address',
str(self.aviationBitAddress)
])
if Func.checkzeros(bits[27:47]):
status_check = 'OK'
else:
status_check = 'ERROR'
self.tablebin.append([
self.bitlabel(118, 137, deduct_offset), bits[27:47],
'Spare should be 0', status_check
])
#################################################
# Vessel 5: Aircraft Operator and Serial Number #
#################################################
elif self.vesselID == '101':
self.operator = Func.baudot2str(bits[3:21], 3)
self.serialnum = Func.bin2dec(bits[21:33])
self.tablebin.append([
self.bitlabel(94, 111, deduct_offset), bits[3:21],
'Aircraft operator:', self.operator
])
self.tablebin.append([
self.bitlabel(112, 123, deduct_offset), bits[21:33],
'Serial number:',
str(self.serialnum)
])
if Func.checkones(bits[33:47]):
status_check = 'OK'
else:
status_check = 'ERROR'
self.tablebin.append([
self.bitlabel(124, 137, deduct_offset), bits[33:47],
'Spare all should be 1', status_check
])
def processHex(self, strhex):
##All second generation beacon messages must be EXACTLY 250 bits
##in length for the program to function properly.
self.bits = Func.hex2bin(strhex)
self.bchstring = ''
self.tablebin = []
self.rotatingbin = []
self.longitude = self.latitude = 'na'
self.location = (0, 0)
self.courseloc = ('na', 'na')
self.errors = []
self.fixedbits = ''
self.testprotocol = ''
if len(self.bits) == 252 or len(self.bits) == 204:
self.type = "Complete message"
pbit = self.bits[0:2]
if pbit == '00':
padding = 'OK'
else:
padding = 'ERROR! left padding should be 00'
self.errors.append(padding)
##Add an additional bit to ensure that bits in array line up with bits in documentation and only include important bits 1-202
self.bits = "0" + self.bits[2:]
##Add the 23 Hex ID to our table
self.beaconHexID = self.uinSgb()
self.tablebin.append(
['', '', 'Beacon 23 Hex ID:', self.beaconHexID])
self.tablebin.append(['left padding', pbit, '', padding])
##BIT 1-20 Type Approval Certificate #
self.tac = Func.bin2dec(self.bits[1:21])
if self.tac < 10000:
warn = 'WARNING!: SGB requires TAC No >=10,000'
else:
warn = ''
self.tablebin.append([
'1-20', self.bits[1:21],
'Type Approval Cert No: ' + str(self.tac), warn
])
##BIT 21-30 Serial Number
self.serialNum = Func.bin2dec(self.bits[21:31])
self.tablebin.append([
'21-30', self.bits[21:31], 'Serial Number:',
str(self.serialNum)
])
##BIT 31-40 Country code
self.countryCode = Func.bin2dec(self.bits[31:41])
self.countryName = Func.countryname(self.countryCode)
self.tablebin.append([
'31-40', self.bits[31:41], 'Country code:',
str(self.countryCode) + ' ' + str(self.countryName)
])
##BIT 41 Status of homing device
self.status = Func.homing(self.bits[41])
self.tablebin.append(
['41', self.bits[41], 'Status of homing device:', self.status])
##BIT 42 Self-test function
self.selfTestStatus = Func.selfTest(self.bits[42])
self.tablebin.append(
['42', self.bits[42], 'Self-test flag:', self.selfTestStatus])
##BIT 43 Test protocol
self.testprotocol = Func.testProtocol(self.bits[43])
self.tablebin.append([
'43', self.bits[43], 'Test protocol flag:', self.testprotocol
])
##BIT 44-90 Encoded GNSS location
self.latitude = Func.getlatitude(self.bits[44:67])
self.tablebin.append(
['44-66', self.bits[44:67], 'Latitude:', self.latitude[0]])
self.longitude = Func.getlongitude(self.bits[67:91])
self.tablebin.append(
['67-90', self.bits[67:91], 'Longitude:', self.longitude[0]])
self.location = (self.latitude[1], self.longitude[1])
################################
# #
# BIT 91-137 VESSEL ID FIELD #
# #
################################
self.vesselIDfill(0, self.bits[91:138])
## BIT 138-139 Beacon Type
self.tablebin.append([
'138-139', self.bits[138:140], 'Beacon Type:',
Func.getBeaconType(self.bits[138:140])
])
## BIT 140 RLS capability
self.tablebin.append([
'140', self.bits[140], 'RLS capability:',
Func.rls(self.bits[140])
])
##BIT 140-154 Spare bits
if Func.checkones(self.bits[141:155]) and not Func.checkones(
self.bits[155:159]):
self.tablebin.append([
'141-154', self.bits[141:155], 'Spare bits',
'OK - all bits 1 and rotating field not a cancellation message'
])
elif Func.checkones(self.bits[141:155]) and Func.checkones(
self.bits[155:159]):
e = 'ERROR! - all bits 1 and rotatating field is a cancellation message (for a cancellation message these bits should be set to 0)'
self.errors.append(e)
self.tablebin.append(
['141-154', self.bits[141:155], 'Spare bits', e])
elif Func.checkzeros(self.bits[141:155]) and Func.checkones(
self.bits[155:159]):
self.tablebin.append([
'141-154', self.bits[141:155], 'Spare bits',
'OK - all bits 0 and rotating field is cancellation message (unless this is a cancellation message, these bits should be set to 1'
])
elif Func.checkzeros(self.bits[141:155]) and not Func.checkones(
self.bits[155:159]):
e = 'ERROR!- all bits 0 and rotating field is not cancellation message'
self.errors.append(e)
self.tablebin.append(
['141-154', self.bits[141:155], 'Spare bits', e])
else:
e = 'ERROR: Bits 141-154 should be set to all 1 or all 0 in the case that the rotating field is a cancellation message'
self.errors.append(e)
self.tablebin.append([
'141-154', self.bits[141:155],
'Cancellation message status:', e
])
#######################################
# #
# BIT 155-202 48 BIT ROTATING FIELD #
# #
#######################################
self.rotatingID = Func.bin2dec(self.bits[155:159])
######################################################
# Rotating Field 0: C/S G.008 Objective Requirements #
######################################################
if self.rotatingID == 0:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:',
'(#0) C/S G.008 Objective Requirements'
])
self.rotatingbin = rotating.rotating0(self.bits[155:203])
########################################
# Rotating Field 1: Inflight Emergency #
########################################
elif self.rotatingID == 1:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#1) Inflight Emergency'
])
self.rotatingbin = rotating.rotating1(self.bits[155:203])
#########################
# Rotating Field 2: RLS #
#########################
elif self.rotatingID == 2:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#2) RLS'
])
self.rotatingbin = rotating.rotating2(self.bits[155:203])
##################################
# Rotating Field 3: National Use #
##################################
elif self.rotatingID == 3:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#3) National Use'
])
self.rotatingbin = rotating.rotating3(self.bits[155:203])
###########################################
# Rotating Field 15: Cancellation Message #
###########################################
elif self.rotatingID == 15:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#15) Cancellation Message'
])
self.rotatingbin = rotating.rotating15(self.bits[155:203])
##################################
# All other rotating fields spare #
##################################
else:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', 'Spare'
])
##Add rotating field data to our list
self.tablebin.extend(self.rotatingbin)
####################################
# 48-BIT BCH ERROR CORRECTING CODE #
####################################
if len(self.bits) == 251:
self.tablebin.append(
['203-250', self.bits[203:], 'Encoded BCH', 'Encoded BCH'])
##Calculate the BCH
self.calculatedBCH = Func.calcBCH(self.bits[1:], 0, 202, 250)
self.bchstring = writebch.calcBCH(self.bits[1:], 0, 202,
250)[1]
self.tablebin.append(
['Calculated', self.calculatedBCH, 'Computed', ''])
##Compare to the BCH in the beacon message
bcherr = self.BCHerrors = Func.errors(self.calculatedBCH,
self.bits[203:])
if bcherr > 0:
bcherror = 'COMPUTED BCH DOES NOT MATCH ENCODED BCH!!'
self.errors.append(bcherror)
self.tablebin.append(['', '', '', bcherror])
elif len(self.bits) == 92:
self.type = 'uin'
##Add an additional bit to ensure that bits in array line up with bits in documentation
self.bits = "0" + self.bits
self.latitude = self.longitude = 'No data available'
self.tablebin.append(['Unique ID', 'Second Generation', '', ''])
self.tablebin.append([
'1', self.bits[1], 'should be 1', ['ERROR',
'OK'][int(self.bits[1])]
])
##BIT 2-11 Country code
self.countryCode = Func.bin2dec(self.bits[2:12])
self.countryName = Func.countryname(self.countryCode)
self.tablebin.append([
'2-11', self.bits[2:12], 'Country code:',
str(self.countryCode) + ' ' + str(self.countryName)
])
##BIT 12-14 Should be 101
if self.bits[12:15] == '101':
status_check = 'OK'
else:
status_check = 'ERROR'
self.tablebin.append(
['12-14', self.bits[12:15], 'Should be 101', status_check])
##BIT 15-34 Type Approval Certificate #
self.tac = Func.bin2dec(self.bits[15:35])
if self.tac < 10000:
warn = 'WARNING! SGB specifications requires TAC No >=10,000'
else:
warn = ''
self.tablebin.append([
'15-34', self.bits[15:35],
'Type Approval Cert No: ' + str(self.tac), warn
])
##BIT 35-44 Beacon Serial Number
self.serialNum = Func.bin2dec(self.bits[35:45])
self.tablebin.append([
'35-44', self.bits[35:45], 'Serial Number',
str(self.serialNum)
])
if self.bits[61:] == '0' * 32:
print('truncated sgb 15 hex id')
self.tablebin.append([
'45-47', self.bits[45:48], 'Vessel ID Type',
Func.getVesselid(self.bits[45:48])
])
self.tablebin.append([
'48-60', self.bits[48:], 'Remaining bits',
'Truncated SGB Hex ID does not allow vessel ID information to be decoded'
])
else:
##BIT 45-91 Aircraft / Vessel ID
self.vesselIDfill(46, self.bits[45:92])
##BIT 92 Fixed value 1
if self.bits[92] == '1':
status_check = 'OK'
else:
status_check = 'ERROR'
self.tablebin.append(
['92', self.bits[92], 'Fixed 1', status_check])
else:
self.type = (
'Hex string length of ' + str(len(strhex)) + '.' +
'\nBit string length of ' + str(len(self.bits)) + '.' +
'\nLength of First Gen Beacon Hex String must be 15, 22 or 30'
+
'\nLength of Second Gen Beacon Bit String must be 204 or 252 bits'
)
raise Gen2Error('LengthError', self.type)
def vesselIDfill(self, deduct_offset, bits):
self.vesselID = bits[0:3]
self.tablebin.append([
self.bitlabel(91, 93, deduct_offset), self.vesselID,
'Vessel ID Type',
Func.getVesselid(self.vesselID)
])
if self.vesselID == '111' and self.bits[
43] == '0' and deduct_offset != 45:
e = 'ERROR! Bit 43 is 0 for system testing message. When vessel ID bits are set to 111, vessel id field is reserved for system testing and the test bit 43 must be 1 for non-operational use.'
self.tablebin.append(
['', 'Vessel ID', 'Reserved for system testing', e])
self.errors.append(e)
self.validhex = False
elif self.vesselID == '111' and self.bits[
45] == '0' and deduct_offset == 45:
e = 'ERROR! Test flag bit 45 in SGB 23 Hex ID (bit 43 in full message) set to 0 for system testing message. When vessel ID bits are set to 111, vessel id field is reserved for system testing and the test bit 45 must be 1 for non-operational use.'
self.tablebin.append(
['', 'Vessel ID', 'Reserved for system testing', e])
self.errors.append(e)
self.validhex = False
##############################################
# Vessel 0: No aircraft or maritime identity #
##############################################
if self.vesselID == '000':
if Func.checkzeros(bits[3:47]):
self.tablebin.append([
self.bitlabel(94, 137,
deduct_offset), bits[3:47], 'Vessel ID',
'With vessel id type set to none (000), bits 94-137 all 0. Valid'
])
else:
e = 'Warning: With Vessel ID type set to none (000), bits 94-137 should be all 0 (unless national assigned)'
self.tablebin.append([
self.bitlabel(94, 137, deduct_offset), bits[3:47],
'Vessel ID', e
])
self.errors.append(e)
self.validhex = False
###########################
# Vessel 1: Maritime MMSI #
###########################
elif self.vesselID == '001':
self.mmsi = Func.bin2dec(bits[3:33])
if self.mmsi == 111111:
self.mmsi_string = 'No MMSI available'
self.tablebin.append([
self.bitlabel(94, 123, deduct_offset), bits[3:33], 'MMSI:',
self.mmsi_string
])
else:
self.mmsi_string = str(self.mmsi).zfill(9)
self.tablebin.append([
self.bitlabel(94, 123, deduct_offset), bits[3:33],
'Unique ship station identity where the first 3 digits are MID (MIDxxxxxx):',
self.mmsi_string
])
self.mmsi_country = Func.countryname(int(
self.mmsi_string[0:3]))
self.tablebin.append([
'', '', 'Flag state of vessel:',
self.mmsi_string[0:3] + ' ' + self.mmsi_country
])
self.tablebin.append(
['', '', 'Unique vessel number', self.mmsi_string[3:]])
self.epirb_ais = Func.bin2dec(bits[33:47])
if self.epirb_ais == 10922:
self.epirb_ais_str = 'No EPIRB-AIS System'
self.tablebin.append([
self.bitlabel(124, 137, deduct_offset), bits[33:47],
'EPIRB-AIS System Identity:', self.epirb_ais_str
])
else:
self.epirb_ais_str = str(self.epirb_ais).zfill(4)
self.epirb_ais_str = '974xx' + self.epirb_ais_str
self.tablebin.append([
self.bitlabel(124, 137, deduct_offset), bits[33:47],
'EPIRB-AIS System Identity', self.epirb_ais_str
])
self._id = '{}-{}'.format(self.mmsi_string, self.epirb_ais_str)
#############################
# Vessel 2: Radio Call Sign #
#############################
elif self.vesselID == '010':
self.callsign = Func.getCallsign(bits[3:45])
self._id = self.callsign
self.tablebin.append([
self.bitlabel(94, 135,
deduct_offset), bits[3:45], 'Radio Callsign',
self.callsign, definitions.moreinfo['sgb_radio_callsign']
])
if Func.checkzeros(bits[45:47]):
status_check = 'OK'
else:
status_check = 'ERROR'
self.validhex = False
self.tablebin.append([
self.bitlabel(136, 137, deduct_offset), bits[45:47],
'Spare should be 0', status_check
])
#########################################################
# Vessel 3: Aricraft Registration Marking (Tail Number) #
#########################################################
elif self.vesselID == '011':
self.tailnum = Func.getTailNum(bits[3:45])
self._id = self.tailnum
self.tablebin.append([
self.bitlabel(94, 135, deduct_offset), bits[3:45],
'Aircraft Registration Marking:', self.tailnum
])
if bits[45:47] == '00':
status_check = 'OK'
else:
status_check = 'ERROR'
self.validhex = False
self.tablebin.append([
self.bitlabel(136, 137, deduct_offset), bits[45:47],
'Spare should be 00', status_check
])
############################################################
# Vessel 4: Aircraft Aviation 24 Bit Address (and ICAO 3LD)#
############################################################
elif self.vesselID == '100':
self.aviationBitAddress = Func.bin2dec(bits[3:27])
h = Func.bin2hex(bits[3:27])
self._id = ' Decimal: {} Hex: {}'.format(self.aviationBitAddress,
h)
self.tablebin.append([
self.bitlabel(94, 117, deduct_offset), bits[3:27],
'Aviation 24 bit address', self._id
])
if Func.checkzeros(bits[27:47]):
status_check = 'OK'
self.tablebin.append([
self.bitlabel(118, 137, deduct_offset), bits[27:47],
'Spare should be 0 ', status_check
])
elif not Func.checkzeros(bits[27:47]):
self.operator = Func.baudotshort2str(bits[27:42], 3)
self.tablebin.append([
self.bitlabel(138, 152, deduct_offset + 20), bits[27:42],
'Aircraft operator designator:', self.operator
])
if not Func.checkzeros(bits[42:47]):
status_check = 'ERROR'
self.validhex = False
else:
status_check = 'OK'
self.tablebin.append([
self.bitlabel(153, 157, deduct_offset + 20), bits[42:47],
'Spare should be 0 ', status_check
])
#################################################
# Vessel 5: Aircraft Operator and Serial Number #
#################################################
elif self.vesselID == '101':
self.operator = Func.baudotshort2str(bits[3:18], 3)
self._id = 'Aircraft Operator: {} Aircraft Serial No. #{}'.format(
self.operator, Func.bin2dec(bits[21:33]))
# self.SerialNum = Func.bin2dec(bits[21:33])
self.tablebin.append([
self.bitlabel(94, 108, deduct_offset), bits[3:18],
'Aircraft operator designator:', self.operator
])
self.tablebin.append([
self.bitlabel(109, 120, deduct_offset), bits[21:33],
'Aircraft serial number:',
str(Func.bin2dec(bits[21:33]))
])
if Func.checkones(bits[33:50]):
status_check = 'OK'
else:
status_check = 'ERROR'
self.validhex = False
self.tablebin.append([
self.bitlabel(124, 137, deduct_offset), bits[33:47],
'Spare 17 bits all should be 1', status_check
])
elif self.vesselID == '111' and self.bits[43] == '1':
self.tablebin.append([
self.bitlabel(94, 137, deduct_offset), bits[3:47], 'Vessel ID',
'Reserved for system testing and test protocol bit 43 set to 1. Bits may contain information whereas default bits 94-137 normally 0s'
])
elif self.vesselID == '111' and self.bits[43] == '0':
self.tablebin.append([
self.bitlabel(94, 137, deduct_offset), bits[3:47], 'Vessel ID',
'Reserved for system testing'
])
elif self.vesselID == '110':
e = 'ERROR! Vessel ID type 110 not defined by T.018. Should not be used'
self.tablebin.append([
self.bitlabel(94, 137, deduct_offset), bits[3:47], 'Spare', e
])
self.errors.append(e)
self.validhex = False
def processHex(self, strhex):
##All second generation beacon messages must be EXACTLY 250 bits
##in length for the program to function properly.
self.bits = Func.hex2bin(strhex)
self.inputhex = strhex
self.bchstring = ''
self.tablebin = []
self.rotatingbin = []
self.longitude = self.latitude = 'na'
self.location = (0, 0)
self.courseloc = ('na', 'na')
self.errors = []
self.warnings = []
self.fixedbits = ''
self.testprotocol = ''
self._id = 'na'
self.SerialNum = 0
self.tac = 0
if len(self.bits) == 252 or len(self.bits) == 204:
self.type = "Complete SGB message"
pbit = self.bits[0:2]
if pbit == '00':
padding = 'Normal mode transmission (i.e., operational mode)'
elif pbit == '10':
padding = 'Self-test mode transmission'
else:
padding = 'ERROR! first two bits not 00 nor 10'
self.errors.append(padding)
self.tablebin.append(['Left pad', pbit, '', padding])
##Add an additional bit to ensure that bits in array line up with bits in documentation and only include important bits 1-202
self.bits = "0" + self.bits[2:]
##Add the 23 Hex ID to our table
self.beaconHexID = self.uinSgb()
#self.tablebin.append(['','','Beacon 23 Hex ID:',self.beaconHexID])
#self.tablebin.append(['left padding',pbit,'',padding])
##T018 Issue 1 - Rev 4: Bit 1-16 Type Approval Certificate # (previously BIT 1-20 Type Approval Certificate #)
self.tac = Func.bin2dec(self.bits[1:17])
if self.tac < 10000:
warn = '# {} Warning: SGB specifications stipulate TAC No should be greater than 10,000'.format(
self.tac)
self.warnings.append('TAC ' + warn)
elif self.tac > 65520:
warn = '# {} - System beacon'.format(self.tac)
else:
warn = '# {}'.format(self.tac)
self.tablebin.append(
['1-16', self.bits[1:17], 'Type Approval Cert No: ', warn])
##T018 Issue 1 - Rev 4: Bit 17-30 Serial Number (previously bit 21-30 Serial Number)
self.SerialNum = Func.bin2dec(self.bits[17:31])
self.tablebin.append([
'17-30', self.bits[17:31], 'Beacon serial number:',
str(self.SerialNum)
])
##BIT 31-40 Country code
self.countryCode = Func.bin2dec(self.bits[31:41])
self.countryName = Func.countryname(self.countryCode)
self.tablebin.append([
'31-40', self.bits[31:41], 'Country code:',
str(self.countryCode) + ' ' + str(self.countryName),
definitions.moreinfo['country_code']
])
##BIT 41 Status of homing device
self.status = Func.homing(self.bits[41])
self.tablebin.append(
['41', self.bits[41], 'Status of homing device:', self.status])
####T018 Issue 1 - Rev 4: Bit 42: RLS Function ( previously Bit 42 Self-test function )
self.tablebin.append([
'42', self.bits[42], 'RLS function capability:',
Func.rls(self.bits[42])
])
##BIT 43 Test protocol
self.testprotocol = Func.testProtocol(self.bits[43])
self.tablebin.append([
'43', self.bits[43], 'Test protocol flag:', self.testprotocol
])
##BIT 44-90 Encoded GNSS location
self.latitude = Func.getlatitude(self.bits[44:67])
if 'Invalid' in self.latitude[0]:
self.errors.append(self.latitude[0])
self.tablebin.append(
['44-66', self.bits[44:67], 'Latitude:', self.latitude[0]])
self.longitude = Func.getlongitude(self.bits[67:91])
if 'Invalid' in self.longitude[0]:
self.errors.append(self.longitude[0])
self.tablebin.append(
['67-90', self.bits[67:91], 'Longitude:', self.longitude[0]])
self.location = (self.latitude[1], self.longitude[1])
################################
# #
# BIT 91-137 VESSEL ID FIELD #
# #
################################
self.vesselIDfill(0, self.bits[91:138])
## T018 Iss.1 Rev.4 Bit 138-140 Beacon Type (previous (Bit 138-139 Beacon Type)
self.tablebin.append([
'138-140', self.bits[138:141], 'Beacon Type:',
Func.getBeaconType(self.bits[138:141])
])
## T018 Iss.1 Rev.4 removed
'''
self.tablebin.append(['140',
self.bits[140],
'RLS capability:',
Func.rls(self.bits[140])])
'''
##BIT 141-154 Spare bits
if Func.checkones(self.bits[141:155]) and not Func.checkones(
self.bits[155:159]):
self.tablebin.append([
'141-154', self.bits[141:155], 'Spare bits',
'OK - all bits 1 and rotating field not a cancellation message'
])
elif Func.checkones(self.bits[141:155]) and Func.checkones(
self.bits[155:159]):
e = 'ERROR! - all bits 1 and rotatating field is a cancellation message (for a cancellation message these bits should be set to 0)'
self.errors.append(e)
self.tablebin.append(
['141-154', self.bits[141:155], 'Spare bits', e])
elif Func.checkzeros(self.bits[141:155]) and Func.checkones(
self.bits[155:159]):
self.tablebin.append([
'141-154', self.bits[141:155], 'Spare bits',
'OK - all bits 0 and rotating field is cancellation message (unless this is a cancellation message, these bits should be set to 1'
])
elif Func.checkzeros(self.bits[141:155]) and not Func.checkones(
self.bits[155:159]):
e = 'ERROR!- all bits 0 and rotating field is not cancellation message'
self.errors.append(e)
self.tablebin.append(
['141-154', self.bits[141:155], 'Spare bits', e])
else:
e = 'ERROR: Bits 141-154 should be set to all 1 or all 0 in the case that the rotating field is a cancellation message'
self.errors.append(e)
self.tablebin.append([
'141-154', self.bits[141:155],
'Cancellation message status:', e
])
#######################################
# #
# BIT 155-202 48 BIT ROTATING FIELD #
# #
#######################################
self.rotatingID = Func.bin2dec(self.bits[155:159])
######################################################
# Rotating Field 0: C/S G.008 Objective Requirements #
######################################################
if self.rotatingID == 0:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:',
'(#0) C/S G.008 Objective Requirements'
])
self.rotatingbin = rotating.rotating0(self.bits[155:203])
########################################
# Rotating Field 1: Inflight Emergency #
########################################
elif self.rotatingID == 1:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#1) ELT(DT) In-flight Emergency'
])
self.rotatingbin = rotating.rotating1(self.bits[155:203])
#########################
# Rotating Field 2: RLS #
#########################
elif self.rotatingID == 2:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#2) RLS'
])
self.rotatingbin = rotating.rotating2(self.bits[155:203])
##################################
# Rotating Field 3: National Use #
##################################
elif self.rotatingID == 3:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#3) National Use'
])
self.rotatingbin = rotating.rotating3(self.bits[155:203])
###########################################
# Rotating Field 15: Cancellation Message #
###########################################
elif self.rotatingID == 15:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#15) Cancellation Message'
])
self.rotatingbin = rotating.rotating15(self.bits[155:203])
##################################
# All other rotating fields spare #
##################################
else:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', 'Spare'
])
##Add rotating field data to our list
self.tablebin.extend(self.rotatingbin)
####################################
# 48-BIT BCH ERROR CORRECTING CODE #
####################################
if len(self.bits) == 251:
# 251 length means 250 plus the stub 0, minus the extra 2 digits of front padding in self.bits
self.tablebin.append(
['203-250', self.bits[203:], 'Encoded BCH', 'Encoded BCH'])
##Calculate the BCH
self.calculatedBCH = Func.calcBCH(self.bits[1:], 0, 202, 250)
self.bchstring = writebch.calcBCH(self.bits[1:], 0, 202,
250)[1]
self.tablebin.append(
['Calculated', self.calculatedBCH, 'Computed', ''])
#self.tablebin.append(['','','','self.calculatedBCH {} : self.bchstring {} {}'.format(self.calculatedBCH,self.bchstring,self.calculatedBCH==self.bchstring)])
##Compare to the BCH in the beacon message
bcherr = self.BCHerrors = Func.errors(self.calculatedBCH,
self.bits[203:])
if bcherr > 0:
bcherror = 'ERROR! COMPUTED BCH DOES NOT MATCH ENCODED BCH!!'
self.errors.append(bcherror)
else:
bcherror = 'VALID BCH: COMPUTED BCH MATCHES'
self.tablebin.append(['', '', '', bcherror])
elif len(self.bits) == 203:
# if user enters a hex 51 excluding bch, then this ,means 202 information bits plus stub 0 minues the 2 digits of front padding
self.tablebin.append([
'203-250', 'NA', 'Encoded BCH',
'Not provided in a 51 Hex. Computed below'
])
self.calculatedBCH = Func.calcBCH(self.bits[1:], 0, 202, 250)
hexBCH = Func.bin2hex(self.calculatedBCH)
self.tablebin.append([
'203-250', self.calculatedBCH, 'Calculated BCH',
'Hex Value: {}'.format(hexBCH)
])
self.tablebin.append([
'Complete Message', '',
'Hex Value: {}{}'.format(self.inputhex, hexBCH), ''
])
elif len(self.bits) == 92:
self.type = 'uin'
##Add an additional bit to ensure that bits in array line up with bits in documentation
self.bits = "0" + self.bits
self.latitude = self.longitude = 'No data available'
self.tablebin.append(['Unique ID', 'Second Generation', '', ''])
self.tablebin.append([
'1', self.bits[1], 'SGB requires this bit value be 1',
['ERROR', 'OK'][int(self.bits[1])]
])
if self.bits[1] == '0':
self.validhex = False
self.errors.append(
'Error: SGB beacon UIN fixed first bit not set to 1')
##BIT 2-11 Country code
self.countryCode = Func.bin2dec(self.bits[2:12])
self.countryName = Func.countryname(self.countryCode)
if self.countryName == 'Unknown MID':
self.validhex = False
self.errors.append('Error: Bad country code: ' +
self.countryName)
self.tablebin.append([
'2-11', self.bits[2:12], 'Country code:',
str(self.countryCode) + ' ' + str(self.countryName),
definitions.moreinfo['country_code']
])
##BIT 12-14 Should be 101 status check for SGB
if self.bits[12:15] == '101':
status_check = 'OK'
else:
status_check = 'ERROR'
self.validhex = False
self.errors.append('Error: Bits 12-14 should be 101')
self.tablebin.append(
['12-14', self.bits[12:15], 'Should be 101', status_check])
##BIT 15-30 Type Approval Certificate #
self.tac = Func.bin2dec(self.bits[15:31])
if self.tac < 10000:
warn = 'Type Approval # {} :: WARNING! SGB specifications requires TAC No >=10,000'.format(
self.tac)
self.validhex = False
self.errors.append(warn)
else:
warn = str(self.tac)
self.tablebin.append(
['15-30', self.bits[15:31], 'Type Approval Cert No: ', warn])
##BIT 31-44 Beacon Serial Number
self.SerialNum = Func.bin2dec(self.bits[31:45])
self.tablebin.append([
'31-44', self.bits[35:45], 'Beacon serial number',
str(self.SerialNum)
])
self.testprotocol = Func.testProtocol(self.bits[45])
self.tablebin.append([
'45', self.bits[45], 'Test protocol flag:',
str(self.testprotocol)
])
if self.bits[45] == '1':
self.validhex = False
if self.bits[61:] == '0' * 32 and self.bits[46:49] != '111':
self.tablebin.append([
'46-48', self.bits[46:49], 'Vessel ID Type',
Func.getVesselid(self.bits[46:49])
])
self.tablebin.append([
'49-60', self.bits[49:61], 'Partial vessel ID',
'WARNING!! = No Identification information or truncated SGB 15 Hex (incomplete partial vessel ID. '
])
self.tablebin.append(
['61-92', self.bits[61:], 'Remaining bits', ''])
#self.vesselIDfill(46, self.bits[46:93])
else:
##BIT 45-91 Aircraft / Vessel ID
self.vesselIDfill(45, self.bits[46:93])
##T018 Iss.1 Rev 4 removed : (was BIT 92 Fixed value 1)
'''
if self.bits[92]=='1':
status_check = 'OK'
else:
status_check = 'ERROR'
self.tablebin.append(['92',
self.bits[92],
'Fixed 1',
status_check])
'''
else:
self.type = (
'Hex string length of ' + str(len(strhex)) + '.' +
'\nBit string length of ' + str(len(self.bits)) + '.' +
'\nLength of First Gen Beacon Hex String must be 15, 22 or 30'
+
'\nLength of Second Gen Beacon Bit String must be 204 or 252 bits'
)
raise Gen2Error('LengthError', self.type)
def rotating2(bits):
rotatingbin = []
#Add a single bit offset so bits array index # matches documentation for readbility
bits = '0' + bits
##BIT 5-6 (159-160) Beacon Type
beacon = definitions.beacon_type[bits[5:7]]
rotatingbin.append(
['159-160 (Rotating field 5-6)', bits[5:7], 'Beacon type', beacon])
##BIT 7-12 (161-166) Beacon RLS Capability
if bits[7] == '1':
rotatingbin.append([
'161 (Rotating field 7)', bits[7],
'Capability to process automatically generated (Acknowledgement RLM Type-1)',
'Acknowledgement Type-1 accepted by this beacon'
])
else:
rotatingbin.append([
'161 (Rotating field 7)', bits[7],
'Capability to process automatically generated (Acknowledgement RLM Type-1)',
'Acknowledgement Type-1 not requested and not accepted by this beacon'
])
if bits[8] == '1':
rotatingbin.append([
'162 (Rotating field 8)', bits[8],
'Capability to process manually generated RLM (e.g. Acknowledgement Type-2)',
'Manually generated RLM accepted by this beacon'
])
else:
rotatingbin.append([
'162 (Rotating field 8)', bits[8],
'Capability to process manually generated RLM (e.g. Acknowledgement Type-2)',
'Manually generated RLM not requested and not accepted by this beacon'
])
rotatingbin.append([
'163-166 (Rotating field 9-12)', bits[9:13], 'Reserved for future use',
'Reserved'
])
##BIT 13-15 (167-169) RLS Provider Identification
try:
rlsp = definitions.rls_provider[bits[13:16]]
except KeyError:
rlsp = 'Unknown RLS provider'
rotatingbin.append([
'167-169 (Rotating field 13-15)', bits[13:16],
'RLS Provider Identification', rlsp
])
##BIT 16-37 (170-190) Beacon Feedback (acknowledgement of RLM reception)
if bits[13:16] == '001':
if bits[16] == '0':
rotatingbin.append([
'170 (Rotating field 16)', bits[16],
'RLM Short/Long message identifier', 'Short RLM'
])
else:
rotatingbin.append([
'170 (Rotating field 16)', bits[16],
'RLM Short/Long message identifier', 'Long RLM'
])
rotatingbin.append(
['171 (Rotating field 17)', bits[17], 'Reserved', 'Reserved'])
if (bits[16] == '0') & (bits[17] == '0'):
rotatingbin.append([
'172-190 (Rotating field 18-37)', bits[18:38], 'RLM',
'Copy of bits 61-80 of the short RLM in the Open Service Signal in Space (section 5.2 of OS SIS ICD)'
])
else:
rotatingbin.append([
'172-190 (Rotating field 18-37)', bits[18:38], 'To be defined',
'To be defined'
])
else:
rotatingbin.append([
'170-190 (Rotating field 16-37)', bits[16:38], 'Reserved',
'Reserved'
])
##BIT 38-48 (191-202) Unassigned
if Func.checkzeros(bits[38:]):
rotatingbin.append(
['191-202 (Rotating field 38-48)', bits[38:], 'Unassigned', 'OK'])
else:
rotatingbin.append([
'191-202 (Rotating field 38-48)', bits[38:], 'Unassigned',
'ERROR: Should be all 0s'
])
return rotatingbin
def rotating0(bits):
rotatingbin = []
#Add a single bit offset so bits array index # matches documentation for readbility
bits = '0' + bits
##BIT 5-10 (159-164) Elapsed time since activation (0 to 63 hours in 1 hour steps)
t_act = Func.bin2dec(bits[5:11])
rotatingbin.append([
'159-164 (Rotating field 5-10)', bits[5:11],
'Elapsed time since activation:',
str(t_act) + ' hours'
])
##BIT 11-21 (165-175) Time from last encoded location (0 to 2047 minutes in 1 minute steps)
t_encoded = Func.bin2dec(bits[11:22])
rotatingbin.append([
'165-175 (Rotating field 11-21)', bits[11:22],
'Time from last encoded location:',
str(t_encoded) + ' minutes'
])
##BIT 22-31 (176-185) Altitude of encoded location
altitude = Func.getaltitude(bits[22:32])
rotatingbin.append([
'176-185 (Rotating field 22-31)', bits[22:32],
'Altitude of encoded location: ', altitude
])
##BIT 32-39 (186-193) Dilution of precision
hdop = Func.getDOP(bits[32:36])
rotatingbin.append(
['186-189 (Rotating field 32-34)', bits[32:36], 'HDOP:', hdop])
vdop = Func.getDOP(bits[36:40])
rotatingbin.append(
['190-193 (Rotating field 35-39)', bits[36:40], 'VDOP:', vdop])
##BIT 40-41 (194-195) Automated/manual activation notification
activation = definitions.activation_note[bits[40:42]]
rotatingbin.append([
'194-194 (Rotating field 40-41)', bits[40:42],
'Automated/manual activation notification', activation
])
##BIT 42-44 (196-198) Remaining battery capacity
battery = definitions.battery[bits[42:45]]
rotatingbin.append([
'196-198 (Rotating field 42-44)', bits[42:45],
'Remaining battery capacity', battery
])
##BIT 45-46 (199-200) GNSS status
gnss = definitions.gnss_status[bits[45:47]]
rotatingbin.append(
['199-200 (Rotating field 45-46)', bits[45:47], 'GNSS status', gnss])
##BIT 47-48 (201-202) Spare
if Func.checkzeros(bits[47:]):
rotatingbin.append(
['201-202 (Rotating field 47-48)', bits[47:], 'Spare', 'OK'])
else:
rotatingbin.append([
'201-202 (Rotating field 47-48)', bits[47:], 'Spare',
'ERROR: Should be 00'
])
return rotatingbin
def processHex(self, strhex):
##All second generation beacon messages must be EXACTLY 250 bits
##in length for the program to function properly.
self.bits = Func.hex2bin(strhex)
if len(self.bits) == 250 or len(self.bits) == 202:
self.tablebin = []
self.rotatingbin = []
##Add an additional bit to ensure that bits in array line up with bits in documentation
self.bits = "0" + self.bits
##BIT 1-20 Type Approval Certificate #
self.tac = Func.bin2dec(self.bits[1:21])
self.tablebin.append([
'1-20', self.bits[1:21], 'Type Approval Certificate #:',
str(self.tac)
])
##BIT 21-30 Serial Number
self.serialNum = Func.bin2dec(self.bits[21:31])
self.tablebin.append([
'21-30', self.bits[21:31], 'Serial Number:',
str(self.serialNum)
])
##BIT 31-40 Country code
self.countryCode = Func.bin2dec(self.bits[31:41])
self.countryName = Func.countryname(self.countryCode)
self.tablebin.append([
'31-40', self.bits[31:41], 'Country code:',
str(self.countryCode) + ' ' + str(self.countryName)
])
##BIT 41 Status of homing device
self.status = Func.homing(self.bits[41])
self.tablebin.append(
['41', self.bits[41], 'Status of homing device:', self.status])
##BIT 42 Self-test function
self.selfTestStatus = Func.selfTest(self.bits[42])
self.tablebin.append([
'42', self.bits[42], 'Self-test function:', self.selfTestStatus
])
##BIT 43 User cancellation
self.cancel = Func.cancellation(self.bits[43])
self.tablebin.append(
['43', self.bits[43], 'User cancellation:', self.cancel])
##BIT 44-90 Encoded GNSS location
self.latitude = Func.getlatitude(self.bits[44:67])
self.tablebin.append(
['44-66', self.bits[44:67], 'Latitude:', self.latitude[0]])
self.longitude = Func.getlongitude(self.bits[67:91])
self.tablebin.append(
['67-90', self.bits[67:91], 'Longitude:', self.longitude[0]])
self.location = (self.latitude[1], self.longitude[1])
################################
# #
# BIT 91-137 VESSEL ID FIELD #
# #
################################
self.vesselID = self.bits[91:94]
##############################################
# Vessel 0: No aircraft or maritime identity #
##############################################
if self.vesselID == '000':
self.tablebin.append([
'91-93', self.bits[91:94], 'Vessel ID:',
'No aircraft or maritime identity'
])
if Func.checkzeros(self.bits[94:138]):
self.tablebin.append(
['94-137', self.bits[94:138], 'Spare:', 'All 0 - OK'])
else:
self.tablebin.append([
'94-137', self.bits[94:138], 'Spare:',
'ERROR: Bits 94-137 should be 0'
])
###########################
# Vessel 1: Maritime MMSI #
###########################
elif self.vesselID == '001':
self.tablebin.append(
['91-93', self.bits[91:94], 'Vessel ID:', 'MMSI'])
self.mmsi = Func.bin2dec(self.bits[94:124])
if self.mmsi == 111111:
self.tablebin.append([
'94-123', self.bits[94:124], 'MMSI:',
'No MMSI available'
])
else:
self.mmsi_string = str(self.mmsi).zfill(9)
self.tablebin.append([
'94-123', self.bits[94:124],
'Unique ship station identity M1I2D3X4X5X6X7X8X9:',
self.mmsi_string
])
self.mmsi_country = Func.countryname(
int(self.mmsi_string[0:3]))
self.tablebin.append([
'', '', 'Flag state of vessel:',
self.mmsi_string[0:3] + ' ' + self.mmsi_country
])
self.tablebin.append([
'', '', 'Unique vessel number:', self.mmsi_string[3:]
])
self.epirb_ais = Func.bin2dec(self.bits[124:138])
if self.epirb_ais == 10922:
self.tablebin.append([
'124-137', self.bits[124:138],
'EPIRB-AIS System Identity:', 'No EPIRB-AIS System'
])
else:
self.epirb_ais_str = str(self.epirb_ais).zfill(4)
self.epirb_ais_str = '974' + self.mmsi_string[
3:5] + self.epirb_ais_str
self.tablebin.append([
'124-137', self.bits[123:137],
'EPIRB-AIS System Identity:', self.epirb_ais_str
])
#############################
# Vessel 2: Radio Call Sign #
#############################
elif self.vesselID == '010':
self.tablebin.append([
'91-93', self.bits[91:94], 'Vessel ID:', 'Radio Call Sign'
])
self.callsign = Func.getCallsign(self.bits[94:136])
self.tablebin.append([
'94-135', self.bits[94:136], 'Radio Callsign:',
self.callsign
])
if Func.checkzeros(self.bits[136:138]):
self.tablebin.append([
'136-137', self.bits[136:138], 'Spare:', 'All 0 - OK'
])
else:
self.tablebin.append([
'136-137', self.bits[136:138], 'Spare:',
'ERROR: Bits 136-137 should be all 0s'
])
#########################################################
# Vessel 3: Aricraft Registration Marking (Tail Number) #
#########################################################
elif self.vesselID == '011':
self.tablebin.append([
'91-93', self.bits[91:94], 'Vessel ID:',
'Aircraft Registration Marking (Tail Number)'
])
self.tailnum = Func.getTailNum(self.bits[94:136])
self.tablebin.append([
'94-135', self.bits[94:136],
'Aircraft Registration Marking:', self.tailnum
])
if Func.checkzeros(self.bits[135:137]):
self.tablebin.append(
['136-137', self.bits[136:138], 'Spare:', 'OK'])
else:
self.tablebin.append([
'136-137', self.bits[136:138], 'Spare:',
'ERROR: Bits 136-137 should be all 0s'
])
##############################################
# Vessel 4: Aircraft Aviation 24 Bit Address #
##############################################
elif self.vesselID == '100':
self.tablebin.append([
'91-93', self.bits[91:94], 'Vessel ID:',
'Aircraft Aviation 24 Bit Address'
])
self.aviationBitAddress = Func.bin2dec(self.bits[93:117])
self.tablebin.append([
'94-117', self.bits[94:118], 'Aviation 24 bit address:',
str(self.aviationBitAddress)
])
if Func.checkzeros(self.bits[117:137]):
self.tablebin.append(
['118-137', self.bits[118:138], 'Spare:', 'OK'])
else:
self.tablebin.append([
'118-137', self.bits[118:138], 'Spare:',
'ERROR: Bits 118-137 following aviation 24 bit address should be 0'
])
#################################################
# Vessel 5: Aircraft Operator and Serial Number #
#################################################
elif self.vesselID == '101':
self.tablebin.append([
'91-93', self.bits[91:94], 'Vessel ID:',
'Aircraft Operator and Serial Number'
])
self.operator = Func.baudot2str(self.bits[94:112], 3)
self.serialnum = Func.bin2dec(self.bits[112:124])
self.tablebin.append([
'94-111', self.bits[94:112], 'Aircraft operator:',
self.operator
])
self.tablebin.append([
'112-123', self.bits[112:124], 'Serial number:',
str(self.serialnum)
])
if Func.checkones(self.bits[124:138]):
self.tablebin.append(
['124-137', self.bits[124:138], 'Spare:', 'OK'])
else:
self.tablebin.append([
'124-137', self.bits[124:138], 'Spare:',
'ERROR: Bits 124-137 following aircraft operator and serial numbers should be 1'
])
##########################
# Other Vessel IDs Spare #
##########################
else:
self.tablebin.append(
['91-93', self.bits[91:94], 'Vessel ID:', 'Spare'])
##BIT 138-154 Spare bits [137-153]
if Func.checkones(self.bits[138:155]):
self.tablebin.append(
['138-154', self.bits[138:155], 'Spare:', 'OK'])
else:
self.tablebin.append([
'138-154', self.bits[138:155], 'Spare:',
'ERROR: Bits 138-154 should be 1s'
])
#######################################
# #
# BIT 155-202 48 BIT ROTATING FIELD #
# #
#######################################
self.rotatingID = Func.bin2dec(self.bits[155:159])
######################################################
# Rotating Field 0: C/S G.008 Objective Requirements #
######################################################
if self.rotatingID == 0:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:',
'(#0) C/S G.008 Objective Requirements'
])
self.rotatingbin = rotating.rotating0(self.bits[155:203])
########################################
# Rotating Field 1: Inflight Emergency #
########################################
elif self.rotatingID == 1:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#1) Inflight Emergency'
])
self.rotatingbin = rotating.rotating1(self.bits[155:203])
#########################
# Rotating Field 2: RLS #
#########################
elif self.rotatingID == 2:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#2) RLS'
])
self.rotatingbin = rotating.rotating2(self.bits[155:203])
##################################
# Rotating Field 3: National Use #
##################################
elif self.rotatingID == 3:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#3) National Use'
])
self.rotatingbin = rotating.rotating3(self.bits[155:203])
###########################################
# Rotating Field 15: Cancellation Message #
###########################################
elif self.rotatingID == 15:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', '(#15) Cancellation Message'
])
self.rotatingbin = rotating.rotating15(self.bits[155:203])
##################################
# All other roating fields spare #
##################################
else:
self.tablebin.append([
'155-158 (Rotating field 1-4)', self.bits[155:159],
'Rotating Field Type:', 'Spare'
])
##Add rotating field data to our list
self.tablebin.extend(self.rotatingbin)
####################
# BEACON 23 HEX ID #
####################
self.hexID = []
##Hex ID BIT 1 = fixed binary 1
self.hexID.append('1')
##Hex ID BIT 2-11 = BITS 31-40 (C/S Country Code)
self.hexID.append(self.bits[31:41])
##Hex ID BIT 12 = fixed binary 1
self.hexID.append('1')
##Hex ID BIT 13 = fixed binary 0
self.hexID.append('0')
##Hex ID BIT 14 = fixed binary 1
self.hexID.append('1')
##Hex ID BIT 15-34 = BITS 1-20 (C/S TAC No)
self.hexID.append(self.bits[1:21])
##Hex ID BIT 35-44 = BITS 21-30 (Beacon Serial Number)
self.hexID.append(self.bits[21:31])
##Hex ID BIT 45-47 = BITS 91-93 (Aircraft/Vessel ID Type)
self.hexID.append(self.bits[91:94])
##Hex ID BIT 48-91 = BITS 94-137 (Aircraft/Vessel ID)
self.hexID.append(self.bits[94:138])
##Hex ID BIT 92 = fixed binary 1
self.hexID.append('1')
##Join list together and convert to Hexadecimal
self.beaconHexID = Func.bin2hex(''.join(self.hexID))
##Add the 23 Hex ID to our table
self.tablebin.append(
['', '', 'Beacon 23 Hex ID:', self.beaconHexID])
####################################
# 48-BIT BCH ERROR CORRECTING CODE #
####################################
if len(self.bits) == 251:
##Calculate the BCH
self.calculatedBCH = Func.calcBCH(self.bits[1:], 0, 202, 250)
##Compare to the BCH in the beacon message
self.BCHerrors = Func.errors(self.calculatedBCH,
self.bits[203:])
##Write the number of errors to our table
self.tablebin.append(
['', '', 'Number of BCH errors:',
str(self.BCHerrors)])
else:
self.type = (
'Hex string length of ' + str(len(strhex)) + '.' +
'\nBit string length of ' + str(len(self.bits)) + '.' +
'\nLength of First Gen Beacon Hex String must be 15, 22 or 30'
+ '\nLength of Second Gen Beacon Bit String must be 250 bits')
raise Gen2Error('LengthError', self.type)
def vesselIDfill(self,deduct_offset,bits):
self.vesselID = bits[0:3]
self.tablebin.append([self.bitlabel(91,93,deduct_offset), self.vesselID , 'Vessel ID Type', Func.getVesselid(self.vesselID)])
if self.vesselID == '111' and self.bits[43]=='0':
self.tablebin.append(['','','Reserved for system testing','ERROR! Test protocol bit 43 is zero'])
self.validhex=False
##############################################
# Vessel 0: No aircraft or maritime identity #
##############################################
if self.vesselID == '000':
if Func.checkzeros(bits[3:47]):
self.tablebin.append([self.bitlabel(94,137,deduct_offset),
bits[3:47],
'Vessel ID type is none',
'All 0 - OK'])
else:
self.tablebin.append([self.bitlabel(94, 137,deduct_offset),
bits[3:47],
'Vessel ID type is none',
'Unless national assigned, should be all 0'])
self.validhex = False
###########################
# Vessel 1: Maritime MMSI #
###########################
elif self.vesselID == '001':
self.mmsi = Func.bin2dec(bits[3:33])
if self.mmsi == 111111:
self.tablebin.append([self.bitlabel(94,123,deduct_offset),
bits[3:33],
'MMSI:',
'No MMSI available'])
else:
self.mmsi_string = str(self.mmsi).zfill(9)
self.tablebin.append([self.bitlabel(94,123,deduct_offset),
bits[3:33],
'Unique ship station identity where the first 3 digits are MID (MIDxxxxxx):',
self.mmsi_string])
self.mmsi_country = Func.countryname(int(self.mmsi_string[0:3]))
self.tablebin.append(['',
'',
'Flag state of vessel:',
self.mmsi_string[0:3] + ' ' + self.mmsi_country])
self.tablebin.append(['',
'',
'Unique vessel number',
self.mmsi_string[3:]])
self.epirb_ais = Func.bin2dec(bits[33:47])
if self.epirb_ais == 10922:
self.tablebin.append([self.bitlabel(124,137,deduct_offset),
bits[33:47],
'EPIRB-AIS System Identity:',
'No EPIRB-AIS System'])
else:
self.epirb_ais_str = str(self.epirb_ais).zfill(4)
self.epirb_ais_str = '974xx' + self.epirb_ais_str
self.tablebin.append([self.bitlabel(124,137,deduct_offset),
bits[33:47],
'EPIRB-AIS System Identity',
self.epirb_ais_str])
#############################
# Vessel 2: Radio Call Sign #
#############################
elif self.vesselID == '010':
self.callsign = Func.getCallsign(bits[3:45])
self.tablebin.append([self.bitlabel(94,135,deduct_offset),
bits[3:45],
'Radio Callsign',
self.callsign,
definitions.moreinfo['sgb_radio_callsign']])
if Func.checkzeros(bits[45:47]):
status_check='OK'
else:
status_check = 'ERROR'
self.validhex = False
self.tablebin.append([self.bitlabel(136,137,deduct_offset),
bits[45:47],
'Spare should be 0',
status_check])
#########################################################
# Vessel 3: Aricraft Registration Marking (Tail Number) #
#########################################################
elif self.vesselID == '011':
self.tailnum = Func.getTailNum(bits[3:45])
self.tablebin.append([self.bitlabel(94,135,deduct_offset),
bits[3:45],
'Aircraft Registration Marking:',
self.tailnum])
if bits[45:47]=='00':
status_check = 'OK'
else:
status_check = 'ERROR'
self.validhex = False
self.tablebin.append([self.bitlabel(136,137,deduct_offset),
bits[45:47],
'Spare should be 00',
status_check])
##############################################
# Vessel 4: Aircraft Aviation 24 Bit Address #
##############################################
elif self.vesselID == '100':
self.aviationBitAddress = Func.bin2dec(bits[3:27])
self.tablebin.append([self.bitlabel(94,117,deduct_offset),
bits[3:27],
'Aviation 24 bit address',
str(self.aviationBitAddress)])
if Func.checkzeros(bits[27:47]):
status_check = 'OK'
else:
status_check = 'ERROR'
self.validhex = False
self.tablebin.append([self.bitlabel(118,137,deduct_offset),
bits[27:47],
'Spare should be 0',
status_check])
#################################################
# Vessel 5: Aircraft Operator and Serial Number #
#################################################
elif self.vesselID == '101':
self.operator = Func.baudot2str(bits[3:21], 3)
self.serialnum = Func.bin2dec(bits[21:33])
self.tablebin.append([self.bitlabel(94,111,deduct_offset),
bits[3:21],
'Aircraft operator designator:',
self.operator])
self.tablebin.append([self.bitlabel(112,123,deduct_offset),
bits[21:33],
'Aircraft Serial number:',
str(self.serialnum)])
if Func.checkones(bits[33:47]):
status_check = 'OK'
else:
status_check = 'ERROR'
self.validhex = False
self.tablebin.append([self.bitlabel(124,137,deduct_offset),
bits[33:47],
'Spare all should be 1',
status_check])
elif self.vesselID == '111' and self.bits[43]=='1':
self.tablebin.append([self.bitlabel(94, 137, deduct_offset),
bits[3:47],
'Reserved for system testing','OK. Test protocol bit 43 set to 1. May contain information; default bits 94-137 - 0s'])
elif self.vesselID == '111' and self.bits[43]=='0':
self.tablebin.append([self.bitlabel(94, 137, deduct_offset),
bits[3:47],
'Reserved for system testing',
''])
elif self.vesselID == '110':
self.tablebin.append([self.bitlabel(94, 137, deduct_offset),
bits[3:47],
'Spare',
'ERROR! Not defined by T.018. Should not be used'])
self.validhex = False