目前,美国有两颗极轨气象卫星(NOAA-9和NOAA-10)在运行着,下一颗极轨气象卫星NOAA-H(成功后即为NOAA-11)计划在1987年12月发射,至90年代中期,美国打算发射发射七颗极轨气象卫星,其时间间隔为12-18个月。美国航宇局、国家海洋大气局(NOAA)和欧空局正着手空间平台计划,这个平台和地面处理系统称为地球观测系统(EOS)。在90年代中期将用航天飞机发射两个永久性平台到极地轨道上,可携带许多不 At present, there are two polar orbiting weather satellites (NOAA-9 and NOAA-10) in operation in the United States. The next polar orbiting meteorological satellite NOAA-H (NOAA-11 succeeded) is planned to be launched in December 1987, By the mid-1990s, the United States planned to launch seven polar orbiting weather satellites at intervals of 12-18 months. NASA, the National Oceanic and Atmospheric Administration (NOAA) and ESA are embarking on a space-based platform initiative known as the Earth Observation System (EOS). In the mid-1990s, two permanent platforms will be launched by space shuttle to polar orbit, carrying many