pyModeS 2.2

公共功能

pms.df(msg)# Downlink Formatpms.icao(msg)# Infer the ICAO address from the messagepms.crc(msg,encode=False)# Perform CRC or generate parity bitpms.hex2bin(str)# Convert hexadecimal string to binary stringpms.bin2int(str)# Convert binary string to integerpms.hex2int(str)# Convert hexadecimal string to integerpms.gray2int(str)# Convert grey code to interger

ADS-B解码的核心功能

pms.adsb.icao(msg)pms.adsb.typecode(msg)# Typecode 1-4pms.adsb.callsign(msg)# Typecode 5-8 (surface), 9-18 (airborne, barometric height), and 9-18 (airborne, GNSS height)pms.adsb.position(msg_even,msg_odd,t_even,t_odd,lat_ref=None,lon_ref=None)pms.adsb.airborne_position(msg_even,msg_odd,t_even,t_odd)pms.adsb.surface_position(msg_even,msg_odd,t_even,t_odd,lat_ref,lon_ref)pms.adsb.position_with_ref(msg,lat_ref,lon_ref)pms.adsb.airborne_position_with_ref(msg,lat_ref,lon_ref)pms.adsb.surface_position_with_ref(msg,lat_ref,lon_ref)pms.adsb.altitude(msg)# Typecode: 19pms.adsb.velocity(msg)# Handles both surface & airborne messagespms.adsb.speed_heading(msg)# Handles both surface & airborne messagespms.adsb.surface_velocity(msg)pms.adsb.airborne_velocity(msg)

注：当您有飞机的固定位置时，可以方便地 使用position_with_ref（）方法解码只有一条位置消息 （奇数或偶数）。这对空中和地面位置都有效 信息。但参考位置应为180nm（机载） 或45纳米（表面）的真实位置。

解码DF4/DF20中的高度应答

pms.common.altcode(msg)# Downlink format must be 4 or 20

解码df5/df21中的身份回复

pms.common.idcode(msg)# Downlink format must be 5 or 21

共模-s函数

pms.icao(msg)# Infer the ICAO address from the messagepms.bds.infer(msg)# Infer the Modes-S BDS register# Check if BDS is 5,0 or 6,0, give reference speed, track, altitude (from ADS-B)pms.bds.is50or60(msg,spd_ref,trk_ref,alt_ref)# Check each BDS explicitlypms.bds.bds10.is10(msg)pms.bds.bds17.is17(msg)pms.bds.bds20.is20(msg)pms.bds.bds30.is30(msg)pms.bds.bds40.is40(msg)pms.bds.bds44.is44(msg)pms.bds.bds50.is50(msg)pms.bds.bds60.is60(msg)

S模式基本监视（ELS）

pms.commb.ovc10(msg)# Overlay capability, BDS 1,0pms.commb.cap17(msg)# GICB capability, BDS 1,7pms.commb.cs20(msg)# Callsign, BDS 2,0

S模式增强监视（ehs）

# BDS 4,0pms.commb.selalt40mcp(msg)# MCP/FCU selected altitude (ft)pms.commb.selalt40fms(msg)# FMS selected altitude (ft)pms.commb.p40baro(msg)# Barometric pressure (mb)# BDS 5,0pms.commb.roll50(msg)# Roll angle (deg)pms.commb.trk50(msg)# True track angle (deg)pms.commb.gs50(msg)# Ground speed (kt)pms.commb.rtrk50(msg)# Track angle rate (deg/sec)pms.commb.tas50(msg)# True airspeed (kt)# BDS 6,0pms.commb.hdg60(msg)# Magnetic heading (deg)pms.commb.ias60(msg)# Indicated airspeed (kt)pms.commb.mach60(msg)# Mach number (-)pms.commb.vr60baro(msg)# Barometric altitude rate (ft/min)pms.commb.vr60ins(msg)# Inertial vertical speed (ft/min)

气象常规空气报告（MRAR）[实验]

# BDS 4,4pms.commb.wind44(msg)# Wind speed (kt) and direction (true) (deg)pms.commb.temp44(msg)# Static air temperature (C)pms.commb.p44(msg)# Average static pressure (hPa)pms.commb.hum44(msg)# Humidity (%)

气象危害空气报告（MHR）[实验]

# BDS 4,5pms.commb.turb45(msg)# Turbulence level (0-3)pms.commb.ws45(msg)# Wind shear level (0-3)pms.commb.mb45(msg)# Microburst level (0-3)pms.commb.ic45(msg)# Icing level (0-3)pms.commb.wv45(msg)# Wake vortex level (0-3)pms.commb.temp45(msg)# Static air temperature (C)pms.commb.p45(msg)# Average static pressure (hPa)pms.commb.rh45(msg)# Radio height (ft)

定制流媒体模块

pymodes中的tcp客户端模块可用于流式传输和处理mode-s 你喜欢的数据。您需要从中重新实现handle_messages()函数 用BaseClient类编写自己的逻辑来处理消息。

下面是一个示例：

frompyModeS.extra.tcpclientimportBaseClient# define your custom class by extending the BaseClient#   - implement your handle_messages() methodsclassADSBClient(BaseClient):def__init__(self,host,port,rawtype):super(ModesClient,self).__init__(host,port,rawtype)defhandle_messages(self,messages):formsg,tsinmessages:iflen(msg)<28:# wrong data lengthcontinuedf=pms.df(msg)ifdf!=17:# not ADSBcontinueif'1'inpms.crc(msg):# CRC failcontinueicao=pms.adsb.icao(msg)tc=pms.adsb.typecode(msg)# TODO: write you magic code hereprintts,icao,tc,msg# run new client, change the host, port, and rawtype if neededclient=ADSBClient(host='127.0.0.1',port=30334,rawtype='beast')client.run()