diff --git a/README.rst b/README.rst index 0c2d3bb..3333348 100644 --- a/README.rst +++ b/README.rst @@ -6,11 +6,17 @@ implemented to decode the following messages: - Automatic Dependent Surveillance - Broadcast (ADS-B) (DF17) - - aircraft information that contains: ICAO address, position, - altitude, velocity (ground speed), callsign, etc. + - aircraft information that contains: ICAO address, position, altitude, velocity (ground speed), callsign, etc. + +- Mode-S Elementary Surveillance (ELS) (DF4 and DF5). + + - DF4: Altitude + - DF5: Squawk code - Mode-S Enhanced Surveillance (EHS) (DF20 and DF21). Additional information in response to SSR interrogation, such as: true airspeed, indicated airspeed, mach number, wind, temperature, etc. + - DF20: Altitude + - DF21: Squawk code - BDS 2,0 Aircraft identification - BDS 2,1 Aircraft and airline registration markings - BDS 4,0 Selected vertical intention