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Hey problem,
      Once I have the CYHZ / Moncton Pals (High/Low) up on their own feeds, I'm hoping to move a bit further afield. The two probables are 14 Wing Greenwood, and the high level feeds out of the Sydney area. I think i have enough scanners laying around to do each frequency from Sydney on their own feed as well (Both high level, & local stuff from McCurdy). I'll have to give it some thought. Definitely would like to have 119.42 (Gander Eastbound Oceanic Clearance Delivery) on its own feed. If I knew a little better just how things work among the sectors, maybe there is a more logical configuration to improve listening to the end user.  I just have to find someone to host. I have no relations in the area, so I will have to look towards aero enthusiasts that might host.

I agree with your thoughts on Yarmouth. I may also have some good sites down that way not far from Wellington....but I'll have to check. However, if Shane gets everything working okay, then that may not be needed....

Listener Forum / Re: US domestic enroute CPDLC use started this week
« Last post by MIAMIATC on June 24, 2018, 11:40:13 AM »
So it Begins !!!   :-(
Listener Forum / Re: US domestic enroute CPDLC use started this week
« Last post by szpajder on June 24, 2018, 03:44:35 AM »
My guess is that they will be using VHF Data Link mode 2 (VDL-2) to carry CPDLC traffic over land.

If there's anyone interested in this topic in the mentioned area with a spare RTL dongle (or SDRPlay) and a Linux PC (or a Raspberry Pi) it may be worth giving it a try with dumpvdl2 ( The current version of the program can decode CPDLC in both standards being in use today (ie. the new ATN-B1 currently used in EU and the old one FANS-1/A which is encapsulated in ACARS message body). Of course it's best to have a VDL-2 ground station in the reception range, so that ATC clearance messages can be received. Otherwise you will be only seeing responses from aircraft (acknowledgements, WILCOs, UNABLEs and an occasional "REQUEST DIRECT TO <fix>" or "REQUEST CLIMB/DESCEND to FLxxx").

Here are a few examples from EU airspace:

Code: [Select]
[2018-04-11 08:30:33 CEST] [136.975] [-18.4/-48.9 dBFS] [30.5 dB]
2B86F7 (Ground station, On ground) -> 424336 (Aircraft): Command
AVLC type: I sseq: 3 rseq: 0 poll: 0
X.25 Data: grp: 11 chan: 255 sseq: 4 rseq: 5 more: 0
CLNP PDU, compressed header:
COTP Data:
   00 a8 09 83 2c 28 a5 8d 46 7a 10 12 82 54 ab 4e 4c e2 00 59 58 39 00
CPDLC Uplink Message:
  Msg ID: 5
  Timestamp: 2018-04-11 06:30:33
  Logical ACK: required
 Message data:
  PROCEED DIRECT TO [position]
   Fix: TUSIN

[2018-04-11 09:51:34 CEST] [136.975] [-28.7/-49.1 dBFS] [20.3 dB]
10920A (Ground station, On ground) -> 4248EF (Aircraft): Command
AVLC type: I sseq: 0 rseq: 7 poll: 0
X.25 Data: grp: 11 chan: 255 sseq: 5 rseq: 4 more: 0
CLNP PDU, compressed header:
COTP Data:
   00 a8 0f a3 30 17 68 65 8d 47 ce 20 1d 62 2d 0a f5 e2 bc 1a 54 ed 41 af 06 0c 38 60 74 bc 82 6e f6 e7 20
CPDLC Uplink Message:
  Msg ID: 3
  Timestamp: 2018-04-11 07:51:34
  Logical ACK: required
 Message data:
  CONTACT [unitname] [frequency]
   Unit name: EPWW, WARSZAWAACC, center
   VHF: 134.875 MHz

[2018-04-01 17:53:58 CEST] [136.975] [-26.2/-48.9 dBFS] [22.7 dB]
424368 (Aircraft, Airborne) -> 2A6198 (Ground station): Command
AVLC type: I sseq: 2 rseq: 4 poll: 0
X.25 Data: grp: 11 chan: 255 sseq: 6 rseq: 1 more: 0
CLNP PDU, compressed header:
COTP Data:
   00 a8 08 16 52 d0 cb 18 1f af 21 06 4a a2 11 02 c7 2c 5d 98
CPDLC Downlink Message:
  Msg ID: 3
  Timestamp: 2018-04-01 15:53:57
  Logical ACK: required
 Message data:
  REQUEST [level]
   Flight level: 370

@dave, will you be accepting data link feeds anytime soon? :)

"LiveATC - from their keyboards to you" ;)
Listener Forum / US domestic enroute CPDLC use started this week
« Last post by JetScan1 on June 24, 2018, 02:08:48 AM »
(from a recent press release)

"U.S. Domestic En Route CPDLC Validation Starting This Week

June 20, 2018

The Federal Aviation Administration (FAA) begins functional validation of the en route Controller Pilot Data Link Communications (CPDLC) system in domestic U.S. airspace this week, starting with targeted flights in Indianapolis Center (ZID ARTCC).

CPDLC allows air traffic controllers to send data link messages to pilots in domestic en route airspace, with services including climbs, descents, reroutes, and handoffs between ATC sectors. Airlines participating in CPDLC should be training flight crews who are flying on equipped aircraft in anticipation of the nationwide deployment over the next year and a half.

During the initial functional validation phase, a small number of flights will be identified by the FAA for possible participation in CPDLC functional validation. Many of the carriers have stated that the crews for these flights will be check airmen, but some carriers may use line pilots with experience using CPDLC in other airspace areas. In all cases, the crews will be briefed beforehand on the specific procedures to be followed during this initial functional validation.

FAA and airlines plan to expand usage of CPDLC later this summer in the Indianapolis, Kansas City, and Memphis Centers. There will also be broader participation of line crews."

hey guys thinking of splitting off some of the channels have 3 more scanners here not hooked up

My suggestion was to split the Yarmouth/YQI feeds into 3 areas.

Radio 1) High Altitude (FL290 and above) - 135.200, 128.375, 132.975 (controller reception on all 3)
Radio 2) Low Altitude IFR (FL280 and below) - 123.900, 119.200, 128.550 (should have controller reception on 123.900, but currently not heard for some reason ?)

Radio 3) Local/VFR/Other - 123.000, 123.550, 118.700, 123.450, 126.700, 129.900, 121.500

I am soon going to have another site setup near CYHZ (I have the feed from there now which has the ATC frequencies on a scanning scanner, as well as the CYAW feed). I am planning to have eight additional feeds from there.

Thanks blacktop ! It will be nice having those frequencies split off onto separate radios. Looking forward to hearing them (especially the Center frequencies).


Dynasty was going to go off the runway so it went around?

I thnik that's it.

747 touch and go is a pretty humbling thing to watch  :-o

Listener Forum / Guam Frequency Outages
« Last post by ryanb977 on June 23, 2018, 04:43:00 PM »

I was wondering if the ZUA frequencies are ever going to come back up. Theyve been down for like 700 days now.

Thanks LiveATC for the services!
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