Feasibility Study for Future Space-Borne Coherent Doppler Wind Lidar, Part 3: Impact Assessment Using Sensitivity Observing System Simulation Experiments

Journal of the Meteorological Society of Japan

Shoken ISHII¹  Kozo OKAMOTO²  Toshiyuki ISHIBASHI³  Philippe BARON⁴ 

[1] Fujitsu FIP Corporation, Tokyo, Japan;Meteorological Research Institute of Japan Meteorological Agency, Tsukuba, Japan;National Institute of Information and Communication Technology, Koganei, Japan;Numerical Prediction Division of Japan Meteorological Agency, Tokyo, Japan

关键词: OSSE;    Doppler wind lidar;    satellite data assimilation;    global wind observation;    numerical weather prediction;   

DOI  :  10.2151/jmsj.2018-024

学科分类：大气科学

来源: Meteorological Society of Japan

【 摘 要 】

 This study evaluated the impact of a future space-borne Doppler wind lidar (DWL) on a super-low-altitude orbit by using an observing system simulation experiment (OSSE) based on a sensitivity observing system experiment (SOSE) approach. Realistic atmospheric data, including wind and temperature, was provided as “pseudo-truth” (PT) to simulate DWL observations. Hourly aerosols and clouds that are consistent with PT winds were also created for the simulation. A full-scale lidar simulator, which is described in detail in the companion paper, simulated realistic line-of-sight wind measurements and observation quality information, such as signal-to-noise ratio (SNR)and measurement error. Quality control (QC) procedures in the data assimilation system were developed to select high-quality DWL observations on the basis of the averaged SNR from strong backscattering in the presence of aerosols or clouds. Furthermore, DWL observation errors used in the assimilation were calculated using the measurement error estimated by the lidar simulator.

【 授权许可】

Unknown