..back to war! So, about the subject "flight mode" counter attack...let's just begin by defining that air traffic use a different TCP/IP protocol like VDL 2...this is something they don't except...if our communications are made in an obsolete (we might say it like this) SDR receiver... they will stay without no way, as their jammers are looking for typical Bluetooth inside the wireless network, or RF microwave...of jamming this system...here's how to install

The VDL2 (for "VHF Data Link mode 2") mode permits automatic transmissions between planes and ground stations, with an exchange of different pieces of information (and especially positions) through AVLC frames (I, UI, RR, XID...) very close to Packet frames. It is a short distance (400 km maximum) service proposed through a network of VHF ground stations (on 136.975 MHz mainly but also 136.875 MHz in Europe). It gradually replaces the ACARS mode.

• The simplest way to decode this mode is to directly demodulate 8PSK frames by MultiPSK, with a SDR receiver (FUNcube Dongle, for example) connected to MultiPSK and the SDR interface started (on the Configuration screen). Adjust the SDR frequency on 136963 kHz and the waterfall frequency on 12 kHz (making it 136.975 MHz).

Or adjust the SDR frequency on 136863 kHz and the waterfall frequency on 12 kHz (making it 136.875 MHz).
The I/Q PSK demodulation will be done by Multipsk, so as the decoding.

• However, a standard USB receiver can be used (both solutions are equivalent from a performance point of view). In this case, the reception central frequency must be shifted by 12 KHz, i.e the frequency on the USB receiver must be adjusted to 136.963 MHz (136963 KHz instead 136975 KHz). Of course, the SDR interface on Multipsk must not be started.

The frequency must be very precisely adjusted (tolerance: +/50 Hz).

"end quote"

As of July 2016 the following 4 frequencies have been found to be active in Europe:

136.725 MHz     dedicated to ARINC

136.775 MHz     dedicated to SITA

136.875 MHz     dedicated to SITA

136.975 MHz     ARINC shared with SITA

Also see: https://ext.eurocontrol.int/WikiLink/index.php/ARINC

Connect the dongle to MultiPSK

RTL dongle specific settings

Setting the VDL2 Mode

Setting the frequency

Coarse frequency adjustment

Fine frequency adjustment

Connecting MultiPSK to Plane Plotter

http://planeplotter.pbworks.com/w/page/75894179/VDL%20mode%202

planeplotter / VDL mode 2

The VDL2 (for "VHF Data Link mode 2") mode permits automatic transmissions between planes and ground stations, with an exchange of different pieces of information (and especially positions) through AVLC frames (I, UI, RR, XID...) very…

PLANEPLOTTER.PBWORKS.COM

tactical jammers position ..drones...

welcome back to war! So, dear friends, what's the important aspects to know about their projectiles send by cannons to disrupt communications ? 1. they send the jammers trough a tactical method which is "two coherent waves traveling along two different paths to the same point will interfere destructively" this means we have to detect two positions, inside their target area, that are sending radio signals, trough projectiles. 2. Do not forget, that this jammers are deployed by drones, and hot ballons 3 and most important, while we are under attack, put all electronic wireless under "flight mode"

ok, before we go to the "flight mode" counter attack..just to refer a detail, on this communication disruption; so, we are emitting a coherent radio frequency (between 20 and 2020 mgz) on two different locations, destiny for the same target, deployed by a drone. To be effective the disruption, based on Physics, is that between the two jamming signals, must have half distance of the wavelength, between them. So if , we deploy one, at 20 miles (for example), the other one, must be emitting at 10 miles distance