FAA's ADS - B Installation Guidance

[The Sage of Milton]

Regarding position-reporting and operations over the North Atlantic:
You may find this video informative (running time is just over an hour)

(you may need to scroll down)

http://forum.aerosoft.com/index.php?...youtube-video/

[nzradar]

Two questions:
1. How do the FAA track planes mid ocean (satellite, buoys, other)?

Most of the 'tracking' is done by the respective Oceanic Control Areas (OCA) and not the FAA itself, for example trans Atlantic traffic is controlled by Gander, New York, Santa Maria and Shanwick. Depending on the aircraft's navigational fit reporting of positions outside of radar coverage include waypoint reporting (voice traffic to the OCA) and CPDLC (Controller to Pilot DataLink Control). The former relies on procedural voice reporting at specified waypoints along the planned or advised route. The latter is pretty much the same except the reporting is done by the aircrafts FANS system via a satellite datalink using Inmarsat channels. Changes requested by the crew and replies or control directives by the OCA are done via computer thus relieving the OCA or contracted radio operators of additional workloads in monitoring or relaying messages.

[YV1HX]

I wonder if we can capture that for FR24 - using an R820T dongle

peterhr

The R820T dongles usually have a low frequency limit about 54~60 Mhz, for receiving signals below that limit you need a up converter like this:

http://www.nooelec.com/store/softwar...ned-radio.html

http://www.rtl-sdr.com/tag/upconverter/

http://blog.kf7lze.net/2012/09/14/ro...erter-choices/

Note:
I'm not related to any of those providers

[peterhr]

High Frequency Data Link (HFDL) is one method... I have a program on my computer called PC-HFDL that captures the packets from my HF rig and displays them via google earth. There are programs such as Plane Plotter also displays this info. Instead of using 1090, there are various frequencies used between 5Mhz up to 28Mhz or thereabouts.

I wonder if we can capture that for FR24 - using an R820T dongle

[KD4MOJ]

Two questions:
1. How do the FAA track planes mid ocean (satellite, buoys, other)?

High Frequency Data Link (HFDL) is one method... I have a program on my computer called PC-HFDL that captures the packets from my HF rig and displays them via google earth. There are programs such as Plane Plotter also displays this info. Instead of using 1090, there are various frequencies used between 5Mhz up to 28Mhz or thereabouts.

I'll see if I can make a short video of it in action for you.

...DOUG
KD4MOJ

[Jarod]

1: Have a look at: http://www.youtube.com/watch?v=EJTjwW5ZYas - Trackwise - Targeting Risk Within The Shanwick OCA - Complete Video

Extra informational links:
http://en.wikipedia.org/wiki/Control...communications
http://en.wikipedia.org/wiki/VHF_Data_Link
http://prezi.com/7erqio0gm3x7/cpdlc-...7aee28254bf9dc
http://www.members.optusnet.com.au/~cjr/CPDLC.htm
http://en.wikipedia.org/wiki/SELCAL

2: no idea.

[peterhr]

Two questions:
1. How do the FAA track planes mid ocean (satellite, buoys, other)?
2. Why does the FAA data plot 'avoid' the t- plots from Ireland (do the FAA not capture the data, do they not share the data or does FR24 avoid plotting the FAA data)?

[peterhr]

One of these works just fine:

http://www.rami.com/product-view.php?pid=164

Hmm, rounded end - less likely to be an electrostatic stress point - lighting attractor ... have to put one on the next antenna.

[t-kclt2]

One of these works just fine:

http://www.rami.com/product-view.php?pid=164

Or you could spent more and install one of these:

http://www.rami.com/product-view.php?pid=24

[Oblivian]

Look for the shark fins half way down the body top and bottom. Thats usually them

[1090 MHz]

http://www.aea.net/Training/courses/...20Guidance.pdf

I've been trying to find out what antenna on the aircraft is used for the ADS-B Out. From what this says, the same S Mode transponder antenna can be used. It also recommends the use of 2 antenna, one on top and one on the bottom of the aircraft. The top mounted antenna is not mandatory, however in my opinion it should be, if they have plans to track aircraft by ADS-B satellites.