An Overview of Progress in the Design And Implementation of Landsat-D Systems
An Overview of Progress in the Design And Implementation of Landsat-D Systems
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Landsat-D 系统设计和实施进展概述
DOI：
10.1109/tgrs.1980.350266
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发表时间：
1980
影响因子：
8.2
通讯作者：
T. Lynch
中科院分区：
文献类型：
--
作者：
V. Salomonson;Pierce Smith;A. Park;W. Webb;T. Lynch
陆地卫星D将于1981年底或1982年初发射，进入700公里附近的太阳同步轨道。正在设计和实施陆地卫星-D系统和主要观测仪器--专题测绘仪，以提供显著改进的地球资源监测能力。专题地图将有七个光谱波段(0.45-0.52、0.52-0.60、0.63-0.69、0.76-0.90、1.55-1.75、2.08-2.35和10.5-12.5？m)，除热波段(120米)外，在最低点的瞬时视场为30米。专题测绘器和其他陆地卫星-D飞行部分系统的数据将使用直接读出能力或跟踪和数据中继卫星系统和通信卫星转发到陆地卫星-D地面数据处理系统。地面系统将在数据采集后48小时内将数据以高达100兆比特/S的速率和2.6亿比特/天的总容量处理成标准的数字和摄影产品。这包括每天200个多光谱扫描仪子系统和100个专题映射器场景。专题测图仪提高了空间、光谱和辐射分辨率，这将在农业和植被调查中发挥主要作用，但在地质、土地利用和水资源应用方面的资源和土地覆盖观测也有望有实质性的改进。
Landsat-D will be launched in late 1981 or early 1982 into a Sun-synchronous orbit near 700 km. Landsat-D systems and the principal observing instrument, the Thematic Mapper, are being designed and implemented to provide a significantly improved Earth-resources monitoring capability. The Thematic Mapper will have seven spectral bands (0.45-0.52, 0.52-0.60, 0.63-0.69, 0.76-0.90, 1.55-1.75, 2.08-2.35, and 10.5-12.5 ¿m), with an instantaneous field of view at nadir of 30 m except for the thermal band (120 m). The data from the Thematic Mapper and other Landsat-D flight segment systems will be relayed to the Landsat-D ground data processing system using a direct readout capability or the Tracking and Data Relay Satellite System and communications satellites. The ground systems will process the data as it arrives at rates up to 100 Mbit/s and a total volume of 2.6 × 1011 bit/day into standard digital and photographic products within 48 hours of data acquisition. This includes 200 Multispectral Scanner Subsystem and 100 Thematic Mapper scenes per day. The Thematic Mapper increased spatial, spectral, and radiometric resolution should be of primary benefit in agricultural and vegetation surveys, but substantial improvements in resource and land cover observations for geology, land use, and water resources applications are also to be anticipated.