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应急地球同步业务环境卫星(GOES)成像仪这项研究,是根据现有GOES卫星中的一颗或多颗卫星万一发生故障时可能需要一种用于气象观测的小型备用成像仪的情况而开展的。应急GOES成像仪(EGI)结构紧凑、重量轻。为了进行天气预报,可见光和红外波段需要最小的分辨率,其中10.2μm～11.2μm红外波段的地面分辨率要求为16 km,0.5μm～0.7μm可见光波段的地面分辨率要求为4km。由于EGI尺寸小(太阳能列阵不包括在内,大致为 15 in×15 in×15 in),它有可能被单独装在发射器上,或者被作为辅助的有效载荷装在较大的卫星上。EGI的总体尺寸要视卫星的定向而定,因为它与具体的卫星定向选用的制冷机以及该制冷机所需的太阳能屏蔽量有关。虽然EGI设计是供一种应急系统用的,但是它所用的技术是最新的,即,它除了在恒定运动的反射镜前面使用一个红外焦平面线列之外,还使用了一个凝视格式的可见光 CCD列阵。对于列阵制造商来说,假定 NEDT为0.1K,红外列阵的定标可能是一个技术难题。我们讨论了为使这种小的简单的系统满足应急要求所采取的一些手段,确定了该设计中的一些制约技术,并探索了扩展这些要求所必须采取的一些改进措施。
Emergency Geostationary Operational Environment Satellite (GOES) Imager This study is based on the situation where one or more of the existing GOES satellites may require a small backup imager for weather observation in the event of a failure Carried out Emergency GOES Imager (EGI) is compact and lightweight. For the weather forecasting, the visible and infrared bands need the minimum resolution. The ground resolution of the infrared band of 10.2μm ~ 11.2μm is required to be 16km. The ground resolution of the visible band of 0.5μm ~ 0.7μm is required to be 4km. Due to the small size of the EGI (roughly 15 in × 15 in × 15 in, excluding the solar array) it may be installed on a separate transmitter or on a larger satellite as an ancillary payload . The overall size of the EGI will depend on the orientation of the satellite as it relates to the specific satellite orientation selected chiller and the amount of solar shielding required by the chiller. Although the EGI was designed for use as an emergency system, the technique it uses is up-to-date, in addition to using a line of infrared focal plane in front of a constantly moving mirror, a gaze-format visible light CCD array. For array manufacturers, assuming an NEDT of 0.1K, scaling of the infrared array can be a technical challenge. We discussed some of the tools that have been used to meet the emergency requirements for such a small, simple system, identified some of the constraints in the design, and explored some of the improvements that must be taken to extend these requirements.