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美国国家海洋与大气管理局正在考虑改进GOES-N/Q系列成象器的工程设计。这种改进包括增加三个分辨率为4km的新的红外通道,并且让成象器覆盖地球的速率提高一倍。为了把这种改进对传感器的光学和机械结构、电子线路盒的分布、数据通信链路以及地面系统的影响减至最小程度,新的设计方法引进了先进技术。通过操作目前探测器列阵的备用部分并且研制双倍速率的信号处理器,扫描伺服系统和电子组件大部分被保留下来。为了增加通道同时保留现有的中继光学系统和辐射致冷器的配置,使用了双色探测器和光学涂料。为了保存传感器的数据和经过处理的中继通信键路,使用了可见光图象的有损数据压缩技术和红外图象的无损数据压缩技术。本文还涉及到系统的噪声等效温差(NEDT)和信噪比(SNR)性能以及新技术的执行问题。
The National Oceanic and Atmospheric Administration is considering improving the engineering of GOES-N / Q series imagers. The improvements include adding three new infrared channels with a resolution of 4km and doubling the rate at which the imager covers the Earth. In order to minimize the impact of such improvements on the optical and mechanical structure of the sensor, the distribution of the electronic circuit boxes, the data communication links, and the terrestrial system, the new design approach introduces advanced technology. By manipulating the spare parts of the current detector array and developing double-rate signal processors, most of the scanning servo system and electronic components are retained. In order to increase the channel while retaining the configuration of the existing relay optics and the radiation cooler, two-color detectors and optical coatings were used. In order to preserve the sensor data and the processed relay communication keyways, lossy data compression of visible light images and lossless data compression of infrared images are used. This article also addresses the system’s noise-equivalent temperature difference (NEDT) and signal-to-noise ratio (SNR) performance as well as the implementation of new technologies.