System Overview:
BM-200 single polarization fully coherent Doppler weather radar. It uses Doppler radar technology to obtain data such as distance, azimuth, reflectivity, and target speed, controls the radar work through software, and processes the obtained basic weather data to generate meteorological products. The BM-200 radar can realize the monitoring and forecasting of conventional and severe weather phenomena.
System composition:
BM-200 single polarization pulse Doppler weather radar consists of antenna and servo system, transmitting system, receiving system, monitoring system, signal processing system, product generation and display system, power distribution system and accessories.
Features:
The system has automatic, safe, continuous, stable and reliable, and unattended operation capabilities. Each subsystem and module is produced, debugged and inspected in strict accordance with technical specifications. All modules that have nothing to do with frequency between systems are interchangeable.
The high-reliability radome against super typhoon is selected, which has been verified by hundreds of systems at home and abroad for many years.
Antenna drives use maintenance-free and long-life AC motors (domestic weather radar antennas usually use brushed DC motors that require maintenance twice a year and have low reliability).
When collecting data, the antenna speed control system uses automatic tracking and adjustment technology, which effectively ensures the spatial positioning accuracy of the detection data.
The klystron is selected from CPI company with a working time of more than 80,000 hours, a working frequency that can be selected by the user within 2700MHz to 3000MHz, and a peak power of 800KW. This not only improves the radar detection capability, data quality, radar applicability, stability and reliability, but also brings great benefits to maintenance and spare parts purchase and storage.
The absorbing active PIN tube receiver protector with long life, low noise, high isolation and fast response is selected, which effectively avoids the influence of the protector on the transmitted pulse and ensures the actual coherence performance of the system.
The high-precision and large-range imported radio frequency numerical control attenuator is used to ensure the reliability and accuracy of the online calibration branch.
It has the functions of real-time online automatic calibration, safety self-protection and multiple fault monitoring points, which effectively guarantees the objectivity and accuracy of the detection data and the safety of the equipment.
It has the network function of sharing observation data and products with multiple weather radars in real time, and has been successfully used in the Beijing Olympic Games, the 60th anniversary celebration of the founding of the People's Republic of China, the 11th National Games and the 2010 Shanghai World Expo.
The system reserves the space, machinery and installation interface required for dual-linear polarization upgrades, without replacing or discarding any components, and only needs to add relevant components to complete the upgrade of dual-linear polarization at the radar station.
Main Specifications:
| category |
project |
technical indicators |
Remark |
| Performance |
working frequency |
2700-3000MHz |
|
| Antenna diameter |
8.54m |
|
| Radome diameter |
11.9m |
|
| Operating mode |
A |
precipitation, bad weather |
|
| B |
clear sky |
| Coverage / Precision / Accuracy |
Reflectivity |
Unambiguous range |
1 - 460Km |
|
| |
Quantitative Valuation Range |
2 - 230Km |
Storage length 1Km |
| |
precision |
1dB |
When S /N≥10dB |
| |
Accuracy |
1dB |
|
| Average diameter |
Unambiguous speed range |
＞ 50m/s |
When the spectral width is 4m/s and |
| to speed |
precision |
1.0m/s |
When S/N ＞ 8dB |
| |
Accuracy |
0.5m/s |
|
| Spectral width |
precision |
1.0m/s |
When the spectral width is 4m/s and |
| |
Accuracy |
0.5m/s |
When S/N > 10dB |
| airspace |
high |
21Km |
|
| |
radius |
460Km |
|
| distance accuracy |
50m |
|
|
| sampling interval |
angle |
1 |
|
|
| distance |
1Km |
( 1 - 230Km ) |
Reflectivity |
| |
2Km |
( 230 - 460Km ) |
Reflectivity |
| |
250m |
( 1 - 230Km ) |
Speed, Spectral Width |
| detection capability |
-7.5dB Ze |
When S/N=0dB, the target is at 50Km |
| System Phase Noise |
≤0.150 |
|
| System dynamic range |
≥85dB |
reflectivity, speed |
| reliability |
MTBF
( mean time between failures ) |
RDA |
607 hours |
|
| RPG |
1000 hours |
|
| PUPs |
2000 hours |
|
| complete machine |
315 hours |
|
| maintainability |
MTTR
( average repair time ) |
0.5 hours |
|
MDT
( max downtime ) |
RDA |
2 hours |
|
| RPG |
1 hour |
|
| PUPs |
1 hour |
|
| communication |
1 hour |
|
| availability |
A (i) ( inherent availability ) |
0.989 |
|
| A (a) ( reachable availability ) |
0.986 |
|
| environmental conditions |
temperature / humidity |
Work |
Not working |
| indoor part |
10 °C - 35 °C / 20% - 80% |
-35 ℃ －60 ℃ / 15% －100 % |
| outdoor part |
-40 ℃－ 49 ℃ / 15% － 100% |
-50 ℃－ 60 ℃ / 15% － 100%
|
| high |
Altitude 3300m |
| wind |
Antenna pointing accuracy ±1/3 °rms |
Under steady wind 25m/s |
| ± 1 °rms |
Under steady wind 50m/s |
| 80m/s |
Radome undamaged |
| precipitation |
When working , the maximum instantaneous precipitation is 300mm/h and the wind speed is 18m/s
|
| 1 -hour average precipitation when not working |
130mm/h wind speed 33m/s without damage |
| 12 -hour average precipitation when not working |
30mm/h wind speed 26m/s without damage |
| 24 -hour average precipitation when not working |
18mm/h wind speed 21m/s without damage |
