Glossary¶

Definitions of the terms used throughout the AryaOS documentation. Each term has a stable anchor so other pages can deep-link to it - for example #device_suffix or #cot.

ADS-B¶

Automatic Dependent Surveillance-Broadcast. Aircraft broadcast GPS-derived position, altitude, velocity, and identity. They usually use 1090 MHz worldwide or 978 MHz UAT in the United States. AryaOS decodes ADS-B and converts it to TAK tracks. See Aircraft (ADS-B).

AIS¶

Automatic Identification System. Vessels broadcast position, course, speed, and identity over VHF at 161-162 MHz. AryaOS decodes AIS with ais-catcher and publishes vessels through AISCOT. See Maritime vessels (AIS).

ATAK¶

Android Team Awareness Kit. The Android TAK client (also referred to as ATAK-CIV in its civilian form). One of the TAK end-user devices that displays the tracks AryaOS produces. AryaOS also works with WinTAK, iTAK, TAKX, and TAK Server.

COTBridge¶

The CoT "ferryman." On AryaOS, COTBridge is the single egress hub. Every local feeder sends CoT to it on udp+ro://127.0.0.1:28087. COTBridge forwards to the default Mesh SA multicast and to any configured TAK Server lanes. Its routing lanes are edited in /etc/cotbridge.ini via the COTBridge lane editor. See COTBridge.

Cockpit¶

The open-source, browser-based server management UI that AryaOS uses as its single admin surface. Cockpit serves HTTPS on port 9090 (also reachable through the portal proxy on 443). AryaOS adds a plugin for each gateway plus the "AryaOS Site" plugin. See AryaOS Site page.

COP¶

Common Operating Picture. A shared, real-time view of aircraft, vessels, drones, friendly positions, and other mission data. A COP combines information from multiple sensors. Building a COP for TAK is a core purpose of AryaOS. See Multi-sensor COP.

CoT¶

Cursor on Target. The XML and Protobuf message format that TAK uses to represent an event. An event can describe an aircraft, vessel, drone, marker, or friendly position. It includes a location, type, and time. Every AryaOS gateway produces CoT. Write Cursor on Target (CoT) on the first use in each page.

cUAS¶

Counter-Unmanned Aircraft Systems (also counter-UAS or C-UAS). Detecting, tracking, and maintaining awareness of drones. On AryaOS the cuas device role runs the drone pipelines (DroneCOT, DJICOT, SiKW00FCOT). See Counter-UAS (drones).

DEVICE_SUFFIX¶

DEVICE_SUFFIX is four lowercase hexadecimal characters derived on first boot from the last four characters of /etc/machine-id. Alternatively, from the primary network interface MAC address if machine-id is unavailable. aryaos-firstboot.service writes it to /etc/aryaos/aryaos-config.txt and sets the system hostname to aryaos-xxxx (the same xxxx).

Used for:

System hostname: aryaos-xxxx
mDNS name: aryaos-xxxx.local
Comitup Wi-Fi hotspot SSID: AryaOS-xxxx
Default CoT source id: COT_HOST_ID=aryaos-xxxx

Do not edit DEVICE_SUFFIX after first boot

Changing it separates the hostname, mDNS name (aryaos-xxxx.local), and captive Wi-Fi SSID. Legacy images can contain an unused NODE_ID= line in aryaos-config.txt. AryaOS no longer writes or reads that line.

See First boot & first login.

GDL90¶

GDL90 is the datalink format that electronic flight bags (EFBs) such as ForeFlight consume for traffic and weather. AryaOS's GDLCOT converts CoT into GDL90 (default UDP port 4000) so aircraft tracks appear directly in an EFB. See ForeFlight & EFBs (GDL90).

Mesh SA¶

Mesh Situational Awareness. TAK's serverless, peer-to-peer mode: clients and gateways exchange CoT over a UDP multicast group without a central server. AryaOS's default egress is Mesh SA on multicast 239.2.3.1:6969 (udp+wo://239.2.3.1:6969). This lets phones on the hotspot see tracks with no TAK Server required. See Relay & routing.

PyTAK¶

Python Team Awareness Kit. The Python framework that every AryaOS gateway is built on. It handles CoT construction, TAK Server TLS. CoT transport URLs like udp+wo:// and tls://. See PyTAK docs and Software suite.

Remote ID¶

The regulatory broadcast standard that drones use to announce identity, position, and operator location. AryaOS captures Remote ID and DJI DroneID. It publishes drones to TAK through DroneCOT and DJICOT. See Counter-UAS (drones).

SDR¶

Software-Defined Radio. A radio whose software performs signal demodulation. AryaOS uses SDRs for ADS-B, UAT, and AIS. It identifies each SDR by its USB serial. Manage them from Radios & SDRs.

TAK¶

Team Awareness Kit. A family of situational-awareness applications (ATAK, WinTAK, iTAK, TAKX) and the TAK Server that share a common map and the CoT message format. AryaOS is a gateway that feeds sensor data into TAK.

TAK Server¶

The central TAK component that relays CoT, manages users and channels, and issues client TLS certificates. AryaOS can connect through a data package or tak:// enrollment link. It can use a TAK Server with or instead of Mesh SA. See Connect to a TAK Server.

UAT¶

Universal Access Transceiver. The 978 MHz datalink used by some US aircraft (typically below 18,000 ft) as an alternative to 1090 MHz ADS-B. AryaOS decodes UAT with dump978-fa on a dedicated SDR serialized stx:978:0. See Aircraft (ADS-B).