1. Introduction
We have developed various atmospheric and meteorological radars of transmitted frequencies between 50-MHz band and 300-THz band including coherent lidars development in cooperation with various research institutes. We introduce our latest Cloud radar and Doppler lidar, and mention the capability of combined observation.
2. Cloud radar
The Ka-band (35-GHz) radar is an excellent tool to observe cloud and fog whose particle size is far smaller than that of precipitation. MELCO first developed the single polarization 35-GHz magnetron Doppler radar in 2000. The new ones which adopt EIK for the transmitter and pulse compression technique in dual polarization have been completely developed and delivered to Nagoya University and Japan National Research Institute for Earth Science and Disaster Prevention (NIED). Its observation sensitivity becomes higher about 10 dB or more than the legacy one.
3. Doppler lidar
In laser frequency band, we have also developed the long range Doppler lidar. Our development target is the realization of the world's best performance, i.e., the longest observation range. To actualize our aim, we have developed the planar waveguide amplifier which has characteristics of high gain, high power, and high reliability. The newest field observation result shows the observable range of more than 25 km in no precipitation condition.
4. Conclusion
With the combination of Doppler lidars and Cloud radars, we can precisely observe intensifying, matured, and dissipating stages of clouds and precipitation. These sensors are expected to detect the sign of torrential rain, i.e., vapor contraction and development of cloud in earlier stage.
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