Sample SBS-3 port 30006 output

 

10 02 TY 00 T1 T2 T3 TY PAYLOAD 1003CRCR

 

10 02 07 00 2f a9 db 00 0510108aaa8460 10036e40

10 02 07 00 34 01 77 02 e18f9c7c1464 1003bad1

10 02 07 00 3d 8c a7 20 00052a7c5b4c 10038298

10 02 07 00 4a a6 ab 28 001010a77c5b4c 1003482e

10 02 07 00 a7 b1 b0 5d 7c7be8000000 10036cf4

10 02 01 00 57 be bc 8d c818805817b1dc4b1fa1000000 1003c3fd

10 02 05 00 05 10 10 a0 a0001298edfa5330215c2a7c6d36 10031bdf

10 02 05 00 c4 f0 a3 a8 0014aaca3c01b0a800007c6d36 100330e9

 

Mode S messsages are either 56 bits or 112 bits in length.

 

First 5 bits = DF ( Downlink Format )

 

02 = 00000 010 ( DF = 00 ) ACAS

20 = 00100 000 ( DF = 04 ) RADAR

28 = 00101 000 ( DF = 05 ) RADAR

5d = 01011 101 ( DF = 11 ) RADAR or ADS-B CA = 101 (5) COM-A and COM-B

8d = 10001 101 ( DF = 17 ) ADS-B CA = 101 (5)

A0 = 10100 000 ( DF = 20 ) RADAR

A8 = 10101 000 ( DF = 21 ) RADAR

 

DF00 02 a1 84 18 7c 6c a2 ( 7 x 8 = 56 bits )

DF04 20 00 05 2a 7c 5b 4c ( 7 x 8 = 56 bits )

DF05 28 00 10 10 a7 7c 5b 4c ( check )

DF11 5d 7c 48 36 00 00 00 ( 7 x 8 = 56 bits )

DF17 8d 7c 6c a2 99 c0 b8 98 c8 48 0b 00 00 00 ( 14 bytes X 8 = 112 bits )

DF20 a0 00 03 3c e3 a9 af 16 3e f7 df 7c 6c 98 ( 14 bytes X 8 = 112 bits )

DF21 a8 00 08 03 83 e8 00 30 e0 00 00 7c 6c 98 ( 14 bytes X 8 = 112 bits )

 

DF00 02 Bytes 05 - 07 = ICAO address

DF04 20 Bytes 05 - 07 = ICAO address

DF05 28 Bytes ( check )

DF11 5d Bytes 02 - 04 = ICAO address

DF17 8d Bytes 02 - 04 = ICAO address

DF20 A0 Bytes 12 - 14 = ICAO address

DF21 A8 Bytes 12 - 14 = ICAO address