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第二代地球静止轨道(GEO)气象卫星用于定量化气象预报,中国已经成功研制出该卫星.卫星上扫描辐射计的探测波段从第一代风云二号的四个增加到现在的十四个,十四个波段中有八个是红外波段,覆盖了短波到甚长波的红外波段.这八个红外波段由三个组件来实现,分别是短波双波段组件(MS-IR),水汽双波段组件(WV-IR)和长波四波段组件(LW-IR).MS-IR组件内包含两个8×1光伏型的MCT探测器芯片,及相对应的两个用于光电输出的电压信号转换和放大的CMOS低温放大器.WV-IR包含两个4×1 MCT探测器芯片.LW-IR包含两个4×1和一个4×2 MCT探测器芯片.这些组件具有较高的电学和光学特性,如MS-IR的D*可达1×1012cmHz1/2W-1.WV-IR的D*优于8×1010cm·Hz1/2W-1.这八个波段的响应谱均实现了定量化控制,即响应谱控制在给定的内部和外部限制边内.对组件进行了狭缝扫描测试,结果表明组件内部没有明显的光学串扰.没两个波段间的配准精度优于0.01 mm.文中描述了这些组件的结构以及达到的性能,如电性能,芯片配准,光学串扰和光谱响应.“,”The second-generation geostationary orbit (GEO) quantitative remote sensing meteorological satellite had been developed by China. Channels of the satellite′s scanning radiometer are increased from four of 1st generation Fengyun-2 to fourteen, with eight infrared channels covering the infrared band from short band to very long band. The eight infrared bands are implemented by three assemblies, known as shortwave dual channel assembly (MS-IR), water vapor dual channel assembly (WV-IR) and long wave four-channel assembly (LW-IR). The MS-IR contains two 8 × 1 PV MCT detector chips, corresponding to two CMOS low-temperature amplifiers, to achieve the photoelectric voltage signal conversion and amplification.The WV-IR contains two 4×1 MCT detector chips. LW-IR contains two 4 ×1 and one 4×2 MCT detector chip. These assemblies have good electrical and optical properties, such as MS-IR D* is up to 1×1012cm·Hz1/2·W-1. WV-IR D* is better than 8×1010cm·Hz1/2·W-1. The response spectra of these eight bands are quantitatively controlled, and the response spectrum is limited to the inner and outer limits. The small spot scanning system test results show that there was no obvious optical crosstalk inside the assembly. The registration accuracies between the two bands were better than 0.01 mm. In this paper, these assemblies are described, as well as performance, such as electrical performance, chip registration, optical crosstalk and relative spectral response.