融合FY-3C号和FY-4A号卫星数据的积雪面积变化研究—以祁连山区为例

乔海伟,张彦丽

FY-3C and FY-4A Satellite Data were Combined to Study the Variation of Snow Cover Area: A Case Study of Qilian Mountains

Haiwei Qiao,Yanli Zhang

表2 FY-4A号气象卫星辐射成像仪主要性能(2 km)

Table2 Main performance of radiation imager of FY-4A satellite

波段/μm 星下点空间分辨率/km S/N或NE△T 主要用途 0.45~0.49 1 ≥150(ρ=100%) 植被 0.55~0.75 0.5 ≥150(ρ=100%) 植被、雾、云 0.75~0.90 1 ≥200(ρ=100%) 植被、水面上气溶胶 1.36~1.39 2 ≥50(ρ=100%) 卷云 1.58~1.64 2 ≥150(ρ=100%) 低云、雪、水云、冰云 2.10~2.35 2~4 ≥200(ρ=100%) 卷云、气溶胶 3.5~4.0 2~4 ≤0.2 K(315 K) 火情