Ground surveillance radars.
VINITI, 1996
Ground surveillance radars
Ground radar RB 12B by Thomson-CSF/Division SDC (France) is a coherent pulse-Doppler radar for ground surveillance at short distances (up to 6.4 km). The radar uses a J-band transmitter on semiconductor devices.
Radar RB 12Vmeets the requirements of military intelligence and software services for surveillance of large areas and such objects as military bases, airfields, oil production areas, weapons depots, warehouses and industrial enterprises.
The basic version of the radar contains the locator itself, a power source and a remote operator console. Although this is a mobile version, it can also be used as a stationary one.
RB 12VAutomatically detects, locks on, locates and tracks moving ground or low-flying objects, pedestrians, light vehicles, trucks, light and ultra-light aircraft and helicopters. The azimuth and range of each detected object are displayed on the display screen, and the Doppler frequency of the sound in the loudspeaker or headphones allows classification of detected objects or targets.
Features of the radar include automatic target acquisition and tracking, target marking and homing, programmable area surveillance, peripheral surveillance, and automatic data transmission. An optional fixed version includes an electronic mapping device that overlays intruder location and tracking data onto a digital map of the area, and an infrared or CCD video camera for target identification.
In order to take into account all the requirements and wishes of customers and the specific features of the areas of future use and to select the optimal configuration of the radar based on this, comprehensive field testing is carried out before serial production.
Technical specifications
| Range | J, five fixed switchable frequencies |
| Polarization | Vertical or circular |
| Average power, mW | 25 |
| Measurement accuracy | ±1° (azimuth), ±20 m (range) |
| Detection range, km | 3 (pedestrians) 6.4 (vehicles) from 3 to 6.4 (ultralight aircraft and helicopters) |
| Antenna rotation speed, deg./s | 8 |
| Observation sector width, deg. | 4, 5, 90, 180 (pre-programmable), 4.5-180 programmable) |
| Detectable target speed, km/h | 3-100 |
| Continuous autonomous operation time, h | 7, from a standard battery |
| Remote control | Has a 100 x 80 mm liquid crystal display, a loudspeaker, a touch keyboard and an RS-232 interface |
| Temperature range, °C | From -40 to 70 |
| Weight, kg | 32 (including tripod, battery and 25 m cable) |
| Power supply, V | 24, DC source or any other source with a converter |
| Power consumption, W | 22 |
| Distance between radar and operator console | 3 or 15 m for tactical version up to 1300 m when permanently installed at the observation site |
The Rasit E ground surveillance radar of long range (up to 40 km) of the above-mentioned company is designed to detect, capture, determine the location and identify moving targets, both ground and located at a low altitude above the ground, in any meteorological conditions. Rasit E is supplied in three modifications:
- portable (three packages of 30 kg);
- mounted in a shelter;
- mounted on vehicles.
It is a pulse-Doppler I-band radar with coherent reception and multiple ranging logic and filters to provide a high probability of target detection. Radar echoes detected in the observation area are displayed on a B-Scape (azimuth and range indicator) daytime display connected to memory.
Each detected target is marked in polar and rectangular coordinates on the television monitor, and the operator is notified of this by a signal changing with the Doppler frequency, which is transmitted to the loudspeaker or headphones. This enables the operator to distinguish among the detected targets pedestrians, wheeled and tracked vehicles, aircraft and helicopters.
The automatic alarm system can be set to sound an alarm whenever a new target appears in the surveillance zone. The operator can select the width of the surveillance sector from 10 to 240° and its length using two operating modes: normal with a detection range of up to 40 km and enhanced with viewing of each 2.5 km section within the full detection range.
The radar can be operated in various conditions by one operator, even without sufficient experience in operating such devices. The typical time of scanning a 120° wide and 20 km long observation zone is 10 s, and the time of target acquisition for tracking is 30 s. The radar antenna beam automatically scans a given sector and can be stopped and then directed at a specific target. The antenna has a polarizer, due to which the radar is insensitive to atmospheric interference and disturbances. The radar also has effective counter-radio countermeasures.
The radar's radio frequency units can be mounted on a tripod and controlled from a remote control located at a distance of up to 100 m. In the mobile version, the radar can be installed in various vehicles. Rasit E can operate in the automatic target acquisition and tracking mode. This radar has the first implementation of the ability to control the observation zone; the operator can block scanning of certain areas of the observation zone to eliminate alarm signals from moving targets.
In addition to the built-in self-checking circuits, the radar can be supplied with a test set used in the third and fourth stages of maintenance. Simulators can also be supplied for effective and comprehensive training of one or more operators.
The radar meets the requirements of tactical reconnaissance and various surveillance services. More than 700 Rasit E radars have been delivered to the armed forces of 20 countries.
Technical specifications
| Operating frequency | Band I (200 MHz) 10 fixed switchable frequencies |
| Pulse power, kW | 3 |
| Polarization | Linear or circular |
| Antenna rotation speed, deg./s | 9 |
| Sector width review | 10 sectors within the range from II to 240° |
| Range (at 90% probability of detection) km | 20 (pedestrians) 40 (vehicles) 20-30 (helicopters) 40 (low-flying aircraft) |
| Speed of movement of detected targets, km/h | 150 (max.) |
| Measurement accuracy | ±0.6° (azimuth), 4:10 m (range) |
| Power consumption, W | 150 W (at 26 V) |
| Temperature range, °C | From -40 to +55 |
| Total weight, kg | 90 |
| Mass of the heaviest package, kg | 28 |
| Additional supplies | Duplicate TV monitor; plotter; identification device «friend or foe» |
Detectit
Many years of experience in operating more than 1000 radars in more than 20 countries around the world enabled Thomson-CSF (France) to develop its latest radar RB 12Btaking this experience into account and create the Detectit system used by this radar.
Detectit is an integrated system consisting of a RB 12V radar transceiver and signal processing unit, supporting circuits and components, a control panel and a connecting line. Additionally, surveillance sensors (TV or infrared), as well as an electronic mapping device, can be supplied.
The Detectit Systemallows you to combine several radars into a single network and control them from a single workstation, as well as integrate this system into existing security systems with automatic transmission of alarm signals to the central operational center. The concept of the Detectit system retains all the positive features of the RB 12B radar and is supplemented by the accumulated experience of Thomson-CSF in combining radars into networks, using infrared cameras and daytime video cameras and other technologies. Each Detectit system is developed taking into account the features of specific surveillance objects and the use of all the company's achievements in the field of ground surveillance radars, automatic detection and location of any ground targets and tracking them, as well as the addition of many new functions related to surveillance within objects with fixed boundaries.
The Detectit systems are in production and are currently in use.