Observation Principle
The DDW1 Lightning Locator detects changes in the electromagnetic field at the observation station caused by lightning discharge using the principles of electromagnetic induction and charge induction. It records the precise timing and waveform characteristics of these electromagnetic field changes. The lightning monitoring and positioning system operates by deploying multiple DDW1 lightning locator substations, which simultaneously detect the electromagnetic fields radiated by the same lightning strike. The detection data is then transmitted in real-time to the central station via a communication system. The central station uses a homology matching algorithm to identify data from the same lightning event detected by multiple locators. The system then employs the Time-of-Arrival (TOA) method to calculate the precise location and time of the lightning discharge.
Technical Indicators
• Lightning Type: Cloud Flash (IC), Cloud-to-Ground Flash (CG)
• Detection Frequency Band: 1k~400kHz
• CG Flash Detection Efficiency: 100%
• Return Stroke Detection Efficiency: 63%
• IC Flash Detection Efficiency: 47%
• Sensitivity: 0.1V/m
• Time Accuracy: 0.1μs
• Return Stroke Resolution: <0.5ms
• Timing Accuracy: <10ns
• Mean Time Between Failures (MTBF): ≥8000 hours
• Power Consumption: <20W
• Operating Temperature: -40°C~+60°C
• Relative Humidity: 5%~100%
• Wind Resistance Grade: Level 12
• Salt Spray Resistance: Suitable for coastal and island operations
• Positioning Error (Median): 448m
Business Applications
The DDW1 Lightning Locator fulfills the lightning detection requirements for sensitive areas such as civil aviation airports, forestry reserves, urban infrastructure, aerospace facilities and petrochemical industries. A total of 434 lightning locators have been deployed in the Lightning Monitoring Network of the China Meteorological Administration. Through national and regional key projects, 540 DDW1 units have been deployed.
