Ki-Ho Chang, Sung-Cheol Choi, Young-Min Noh, Dong-Oh Park, Miyoung Kang, Jin-Yim Jung,

and Back-Jo Kim

SOLETOP, NIMS/KMA

2

System

Laser(wavelength) Nd:YAG Laser(355 nm)

Detected wave355 nm (P/S), 387 nm(N2), 407 nm (H2O)

Pulse interval 20 Hz

Caliber of telescope 9.25 inch

Products

Depolarization ratio Classification of water/ice in cloud

Mixing ratio g/kg

Spec. of Cloud Lidar

< Simple Split method >(2012, patent registered)

< Cloud Lidar >

3

4000

6000

8000

10000

12000

1E-3 0.01 0.1 1

2003.04.03 (04:00)

Hei

ght (

m)

Aerosol Extinction Coefficient (/km)

0.0 0.1 0.2 0.3 0.4 0.5Depolarization Ratio

Cloud

Case of the cloud phase obs.(1/2)

v Cloud of Water droplets

4

2000

4000

6000

8000

10000

12000

1E-3 0.01 0.1

2003.03.19. (03:00)

Hei

ght (

m)

Aerosol Extinction Coefficient (/km)

0.0 0.1 0.2 0.3 0.4 0.5Depolarization Ratio

Cirrus Cloud

GIST

v Cloud of ice crystals

Case of the cloud phase obs.(2/2)

< Previous Products >German Meteorological Service – Ramanlidar for atmospheric moisture sensing(RAMSES) 2012

Case of the mixing ratio obs.

< Our observed Mixing ration (g/kg) >19:40 25 ~ 5:40 26 Oct. 2010

(10 min. interval)

22:00 4 - 6:30 5 Nov. 2016

S/W of Cloud Lidar

7

Spec. of 2DVD

Spec. of 2DVDMeasurement range

- Particle size 0.1 mm ~ 25 mm

- Particle velocity 0.5 m/s ~ 25 m/s

Transmitter Laser diode, 650 nm

Receiver (detector) Line scan camera

- Resolution 512 pixels

- Line rate 98 kHz

- Pixel size 14 um

Measuring area 50 cm2

< 2DVD >

8

Detecting Method of 2DVD

Beam width : 7 mm

Rainfall Chart

S/W of 2DVD: Rainfall Obs.

-1-

Summary

Cloud Lidar (prototype) provides reasonable results:

- Cloud Phase (water, ice) classification

- Mixing ratio

- Height of cloud base

- Needs the comparison studies by such as Ceilometer

2DVD (prototype) provides reasonable results:

- Falling velocity vs rainfall size

- Needs the observation and analysis for snowfall particles