The Air-to-Ground radio system is a VHF radio system used to communicate between ground stations and aircraft within a set radius from an airport in order to facilitate airline operations such as the exchange of passenger information or preparation of tools, spare parts, oil and fuel supplies and medical services.
The Air-to Ground radio system consists of the following components:
1. The Air-to-ground Base Station (A/G base station) is used for air-to-ground communications within a radius of 200 nautical miles around the station.
2. The Remote control unit (RCU) is installed at the office of a base station to facilitate long range control and communication.
3. The Air-to-ground handie-talkie (A/G handie-talkie) is a hand-held communication radio used for air-to-ground communications within a radius of 10 nautical miles.
4. The Air-to-ground car radio (A/G mobile radio) is a communication radio installed in cars for mobility. It is used for air-to-ground communications within a radius of 50 nautical miles.
5. The Air-to-ground mobile radio for desktop (A/G mobile radio for desktop) is a communication radio installed at the ground station. It is used for air-to-ground communications within a radius of 150 nautical miles.
The Ground-to-Ground radio system is a radio system used for communication between ground stations to assist in coordination between agencies in order to ensure the safe, expedient and efficient execution of ground operations. This type of radio system can be separated into 2 categories which are:
- The single-channel radio service (Conventional radio) is a service provided at locations with smaller perimeters that have a minimal number of network users such as might be encountered at smaller airports.
- The trunked radio service is a service provided at locations with larger perimeters that employ numerous network users in the coverage area. At present, the company uses TETRA standard digital trunked radio to provide services to major airports and energy agencies. The provided trunked radio services are as follows:
- Non-intrinsically and intrinsically safe mobile communications radio for normal and emergency communication. These radios are made of IP67 level special durable materials in compliance with Ingress Protection standards. The intrinsically safe model can prevent fire and sparking in compliance with ATEX/FM/UL standards. These radios are suitable for operations at locations with significantly higher risk of explosions. Sound quality for this system is clear even where there is a noisy surrounding environment. Its display screen is exceptionally bright and utilizes a large font size. Batteries for the units are long-life and an alert system to indicate when there is a low battery is included.
- Communication radio stations and automotive installation communication radios that are easy to use, work well in noisy areas and are durable and mobile.
The Transmitter and receiver (AMSS Terminal TX & RX)
The Transmitter and receiver (AMSS Terminal TX & RX) are devices used for transmitting and receiving flight information which use a program called the AEROTHAI User Agent (UA) via the Aeronautical Telecommunication Network (ATN). The flight information transmitted by this system includes:
- Domestic and foreign notices to airmen (NOTAM)
- Flight approvals and flight plans
- Aviation Meteorology (MET)
- Other security information
Equipment users can develop, file and receive flight plans and have access to pre-flight briefings which contribute to safety and support efficient pre-flight operations.