Lightning Mapping Imager (LMI)
Description
One of the first two lightning mappers for geostationary meteorological satellite in the world, and the Chinese first ever made instrument such as this. Technically featured by planar CCD array and optic imaging sector, to keep track of thunderstorm development by detecting and mapping the lightning events occurring in a cloud, cloud-cloud, or cloud-ground within the observation area. For service to aviation, railway, power supply company, as well as strong convective weather monitoring.
LMI looks at China area in spring-autumn seasons, and at Indian ocean and west Australia the rest of a year.
| Satellite | FY-4A |
|---|---|
| Weight | 65kg |
| Dimension | 528mm (length) × 346mm (width) × 1032mm (height) |
| CCD | 400 × 600 units |
| Image rate | 500 frames per second |
| Central wave-length | 777.4nm |
| Bandwidth | 1nm |
| Spatial Resolution | 7.8km |
| Total field angle | 4.98° (latitudinal) × 7.41° (longitudal) |
| Detection efficiency | 90% |
| False alarm rate | 10% |
Observation range of LMI from spring to autumn (105°E)
Data and Products
| Satellite | Instrument | Data Code |
|---|---|---|
| FY-4A | LMI | L2L3 product |
Calibration and Validation
LMI