云雷达与FY-4B融合反演云顶高度方法研究OA

The satellite-ground temperature difference was derived from the cloud top temperature of FY-4B and the air temperature of automatic weather stations.Combined with the cloud top height(CTH)ob-served by cloud radar,the satellite-ground vertical mean temperature lapse rate(SG-VMTR)was calculat-ed and compared with the vertical temperature lapse rate(γ)fitted from the radiosonde temperature profile at the same stations.Meanwhile,the SG-VMTR was applied to other adjacent satellite pixels to achieve the fusion inversion of the satellite CTH in the surrounding areas of the cloud radar,and the inversion re-sults were verified and analyzed.The results show that the SG-VMTR and γ values calculated at the same station were closely aligned and exhibited consistent temporal trends.The variation trends and statistical characteristics of the SG-VMTR at adjacent cloud radar stations were similar and can be used as substitutes to a certain extent.The correlation coefficient between the fused satellite-derived CTH and the cloud radar observed CTH was 0.90,while the root mean square error decreased by 720 m and the bias reduced to-17.7 m compared to pre-fusion results.This study lays a foundation for developing subsequent satellite-ground fusion regional CTH products.