• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

Second VDL2 frequency active in USA

Joined
Aug 13, 2002
Messages
877
Location
Central Halton County, Ontario Canada
#1
CONFIRMED 136.650 is active in the Cleveland, Ohio area. Aircraft logged and confirmed positions from the ECK area of Michigan (north of DTW) to the Cleveland area to slightly east of Pittsburgh. I believe this is the first posted confirmation of a second active VDL2 frequency in North America.

All traffic seen so far has been using address 11512A as the destination ground station.

Cheers!

Bob

Sample decodes from DumpVDL2:

[2018-10-11 01:47:54 GMT] [136.650] [-5.2/-46.1 dBFS] [40.9 dB] [-2.8 ppm]
AAED0D (Aircraft, Airborne) -> 11512A (Ground station): Command
AVLC type: I sseq: 3 rseq: 3 poll: 0
ACARS:
Reg: .N803AL Flight: AA0042
Mode: 2 Label: 5Z Blk id: 1 Ack: ! Msg no.: M29A
Message:
OS LIPZ /FTMTHE.TURB.REPORTS.ALL
SEEM.TO.BE.ABOVE.330
DO.YOU.THINK.WE
WOULD.BE.OK.AT.310

[2018-10-11 01:52:22 GMT] [136.650] [-27.4/-45.9 dBFS] [18.5 dB] [4.7 ppm]
A557C3 (Aircraft, Airborne) -> 11512A (Ground station): Command
AVLC type: I sseq: 0 rseq: 0 poll: 0
ACARS:
Reg: .N443WN Flight: WN1831
Mode: 2 Label: 37 Blk id: 4 Ack: ! Msg no.: M36A
Message:
09UCQHI
AQTOKAFQ(
RPC/VC/CWDOA/2P
 

DaveNF2G

Member
Premium Subscriber
Joined
Jan 23, 2001
Messages
9,124
Location
Rensselaer, NY
#2
I am receiving VDL2 on 136.650 in the Albany, NY, area (KALB).

Later I will set up side-by-side monitoring and try to figure out the traffic distribution.
 
Joined
Feb 20, 2001
Messages
6,190
#4
Picking it up in the San Francisco Bay Area as well. Not hearing the ground station, but aircraft are communicating to 1131EA.
 

AirScan

Member
Premium Subscriber
Joined
Feb 13, 2007
Messages
332
#5
(from the other thread)

According to the FCC database 136.650 is active at the following airports (from East to West) -

JFK, LGA, EWR, PHL, DTW, BNA, MDW, ORD, STL, PHX, LAS, SAN, LAX, OAK.

https://fjallfoss.fcc.gov/General_Me...?accessible=NO

So far we have ...

11512A - probably DTW (received in Toronto and Ottawa)
1131EA - probably OAK (received in San Francisco and Reno)

Based on these two it seems 136.650 ARINC GS ID is 11xxxx vs 10xxxx on 136.975

AS
 

EricCottrell

Member
Database Admin
Joined
Nov 8, 2002
Messages
2,267
Location
Boston, Ma
#6
Hello,

In the emission field of FCC licenses, 6K00A3E is Voice, 13K0A2D is ACARS, and 14K0G1D is VDL2.

There are two nationwide mobile licenses that have 14K0G1D listed on frequencies from 136.500 to 136.975 (25 KHz steps). I found several licenses for voice on 136.500 in New England, but the only licensed VDL2 Frequency is 136.975. However, there is a pending license modication for VDL2 on 136.800.

It turns out 136.800 is the secondary SITA frequency for VDL2. It is currently licensed at:
Code:
KOE3	LOS ANGELES INTL AIRPORT	33-56-30.8 N, 118-24-07.7 W
KPD97	ST LOUIS INTERNATIONAL AIRPORT	38-44-54.1 N, 090-20-47.3 W	
KPE8	FORT LAUDERDALE-HOLLYWOOD AIRPORT	26-04-09.0 N, 080-09-21.3 W		
KSU73	CHICAGO OHARE INTERNATIONAL AIRPORT	41-58-30.2 N, 087-54-22.9 W	
WPTA590	Washington Dulles International Airport 38-56-55.3 N, 077-27-03.8 W	
WPVS825 5800 Blue Lagoon Dr Miami, FL 	25-46-55.3 N, 080-17-30.0 W
WQAD500	Philadelphia International Airport	39-53-27.5 N, 075-14-00.1 W	
WQDR976 Hartsfield-Jackson Atlanta 		33-39-21.1 N, 084-25-26.3 W		
WQDU856 Orlando International Airport		28-25-52.2 N, 081-18-24.7 W		
WQEG284 Dallas Ft Worth International Airport	32-53-57.3 N, 097-02-09.4 W	
WQEW396	Tampa Intl Airport	27-58-49.4 N, 082-32-03.5 W	
WQGZ716 LaGuardia Airport 		40-46-12.0 N, 073-51-40.0 W		
WQK6	LOS ANGELES INTL AIRPORT	33-56-32.0 N, 118-24-34.0 W	
WQLF455 Memphis International Airport 	35-02-59.0 N, 089-58-43.0 W
WQYE696 Chicago Midway International Airport	41-47-12.7 N, 087-45-40.3 W
136.650 is likely the secondary ARINC frequency for VDL2.

73 Eric
 

DaveNF2G

Member
Premium Subscriber
Joined
Jan 23, 2001
Messages
9,124
Location
Rensselaer, NY
#7
The license modification might be to harmonize the name of the official licensee, as SITA now handles all licensing within the FCC's jurisdiction.
 

EricCottrell

Member
Database Admin
Joined
Nov 8, 2002
Messages
2,267
Location
Boston, Ma
#8
Hello,

In reviewing my logs from my Bowie Trip, I see there is quite a bit of activity on 136.650. It seemed to be in the DE, MD, and VA area.

It appears several aircraft started to try connecting to a too distant ground station on 136.650 when at only 1000 feet. The nearest ground station on 136.650 in the Washington, DC area is 11126A and aircraft successfully communicated with it. I could also get frames from the 101126A station on 136.976. I saw aircraft trying to connect to 11340a 11341a and 11346a, but did not appear successful.

I also captured a couple of autotune to 136.650 transmissions from several ground stations to aircraft.

[2018-12-27 20:02:06 EST] [136.650] [-39.8/-52.0 dBFS] [12.2 dB] [1.1 ppm]
A23200 (Aircraft, Airborne) -> 11126A (Ground station): Command
AVLC: type: U (XID) P/F: 1
XID: Handoff Initiation
Public params:
Parameter set ID: 8885:1993
Procedure classes: 00 01
HDLC options: 20 84 80
VDL params:
Parameter set ID: V
XID sequencing: 02
Destination airport: KBNA
Aircraft location: 39.4N 78.2W 37000 ft
AVLC specific options: 24
Connection management: 01


[2018-12-27 20:02:07 EST] [136.650] [-39.4/-51.8 dBFS] [12.4 dB] [1.3 ppm]
A23200 (Aircraft, Airborne) -> 11126A (Ground station): Command
AVLC type: I sseq: 0 rseq: 0 poll: 0
ACARS:
Reg: .N240WN Flight: WN6059
Mode: 2 Label: H1 Blk id: 6 Ack: ! Msg no.: D80A
Message:
#DFB++76502,240,B737-700,181228,WN6059,KPHL,KBNA,0197,SW1804
6
N3956.2,W07608.4,280045,22237,-22.3,262,045,CL,00000,0,
N3952.6,W07633.2,280048,27390,-35.8,262,044,CL,00000,0,
N3945.8,W07658.8,280051,32926,-


[2018-12-27 20:15:08 EST] [136.650] [-41.7/-52.1 dBFS] [10.4 dB] [-0.9 ppm]
A73410 (Aircraft, Airborne) -> 11126A (Ground station): Command
AVLC: type: U (XID) P/F: 1
XID: Handoff Initiation
Public params:
Parameter set ID: 8885:1993
Procedure classes: 00 01
HDLC options: 20 84 80
VDL params:
Parameter set ID: V
XID sequencing: 04
Destination airport: KATL
Aircraft location: 38.4N 78.2W 38000 ft
AVLC specific options: 24
Connection management: 01


[2018-12-27 21:13:34 EST] [136.975] [-14.0/-51.5 dBFS] [37.6 dB] [-1.1 ppm]
104CDA (Ground station, On ground) -> AA159E (Aircraft): Command
AVLC: type: U (XID) P/F: 0
XID: Handoff Request / Broadcast Handoff
Public params:
Parameter set ID: 8885:1993
Procedure classes: 00 01
HDLC options: 20 84 80
N1-downlink: 07 d8
N1-uplink: 07 d8
VDL params:
Parameter set ID: V
Connection management: 01
XID sequencing: 00
AVLC specific options: 20
Autotune frequency: 136.650 MHz (VDL-M2, D8PSK, 31500 bps)
Replacement ground stations: 11126A
ATN router NETs: 00 00 00 00 00 00 "......"
System mask: fc 02 00 00


[2018-12-27 22:12:58 EST] [136.975] [-32.9/-51.3 dBFS] [18.4 dB] [-2.1 ppm]
1054BA (Ground station, On ground) -> A2195D (Aircraft): Command
AVLC: type: U (XID) P/F: 0
XID: Handoff Request / Broadcast Handoff
Public params:
Parameter set ID: 8885:1993
Procedure classes: 00 01
HDLC options: 20 84 80
N1-downlink: 07 d8
N1-uplink: 07 d8
VDL params:
Parameter set ID: V
Connection management: 01
XID sequencing: 00
AVLC specific options: 20
Autotune frequency: 136.650 MHz (VDL-M2, D8PSK, 31500 bps)
Replacement ground stations: 11126A
ATN router NETs: 00 00 00 00 00 00 "......"
System mask: fc 02 00 00


[2018-12-28 17:23:07 EST] [136.975] [-43.9/-51.7 dBFS] [7.8 dB] [-0.8 ppm]
10509A (Ground station, On ground) -> A388A9 (Aircraft): Command
AVLC: type: U (XID) P/F: 0
XID: Handoff Request / Broadcast Handoff
Public params:
Parameter set ID: 8885:1993
Procedure classes: 00 01
HDLC options: 20 84 80
N1-downlink: 07 d8
N1-uplink: 07 d8
VDL params:
Parameter set ID: V
Connection management: 01
XID sequencing: 00
AVLC specific options: 20
Autotune frequency: 136.650 MHz (VDL-M2, D8PSK, 31500 bps)
Replacement ground stations: 11126A
ATN router NETs: 00 00 00 00 00 00 "......"
System mask: fc 02 00 00


73 Eric
 

EricCottrell

Member
Database Admin
Joined
Nov 8, 2002
Messages
2,267
Location
Boston, Ma
#9
Hello,

It looks like SITA is doing some work in the New York City area. In the log this evening I see activity on 136.800 from aircraft sending messages to these ground stations. I did not see any activity when I went through the area just before New Years.

22DE41 KEWR
261C21 KLGA

[2019-02-02 19:11:41 EST] [136.800] [-29.7/-51.0 dBFS] [21.2 dB] [-0.6 ppm] [S:0] [L:44] [F:0] [#0]
A8DD7B (Aircraft, Airborne) -> 261C21 (Ground station): Command
AVLC type: I sseq: 0 rseq: 0 poll: 0
ACARS:
Reg: .N670UA Flight: UA0019
Mode: 2 Label: Q0 Blk id: 6 Ack: ! Msg no.: S46A
Message:

[2019-02-02 19:11:42 EST] [136.800] [-29.9/-51.2 dBFS] [21.3 dB] [-0.6 ppm] [S:0] [L:55] [F:0] [#0]
A8DD7B (Aircraft, Airborne) -> 261C21 (Ground station): Command
AVLC type: I sseq: 1 rseq: 1 poll: 0
ACARS:
Reg: .N670UA Flight: UA0019
Mode: 2 Label: SA Blk id: 7 Ack: ! Msg no.: M18A
Message:
0E20010422S
Media Advisory, version 0:
Link VDL2 established at 00:10:42 UTC
Available links: VDL2, Default SATCOM

[2019-02-02 19:13:14 EST] [136.800] [-31.5/-50.6 dBFS] [19.2 dB] [-0.6 ppm] [S:0] [L:44] [F:0] [#0]
A8DD7B (Aircraft, Airborne) -> 22DE41 (Ground station): Command
ff ff 01 32 ae ce b6 37 b0 d5 c1 15 51 b0 38 02 d3 34 37 c1 d5 c1 b0 b0 31 b9 83 64 f1 7f
AVLC type: I sseq: 0 rseq: 0 poll: 0
ACARS:
Reg: .N670UA Flight: UA0019
Mode: 2 Label: Q0 Blk id: 8 Ack: ! Msg no.: S47A
Message:

[2019-02-02 19:13:15 EST] [136.800] [-31.2/-51.2 dBFS] [20.0 dB] [-0.7 ppm] [S:0] [L:14] [F:0] [#0]
A8DD7B (Aircraft, Airborne) -> 22DE41 (Ground station): Response
AVLC: type: S (Receive Ready) P/F: 0 rseq: 1

73 Eric
 

EricCottrell

Member
Database Admin
Joined
Nov 8, 2002
Messages
2,267
Location
Boston, Ma
#10
Hello,

JFK appeared on 136.800 shortly after I posted my previous message, of course.

251961 KJFK

No activity heard on 136.650 in my listening area.

73 Eric
 

AirScan

Member
Premium Subscriber
Joined
Feb 13, 2007
Messages
332
#11
Eric,

Are you still getting anything on 136.800 in the Boston area ?

Recent logs from the Florida and New York area are not showing any traffic on 136.800 now. Anyone on the forum here in the central/southern Florida area monitoring VDL2 ?

AS
 

DaveNF2G

Member
Premium Subscriber
Joined
Jan 23, 2001
Messages
9,124
Location
Rensselaer, NY
#13
I think there might be sporadic testing on other channels from time to time, as well as the occasional misconfiguring of a new ground station that directs aircraft to use a frequency that is unassigned.
 
Top