卫星测高 [测] satellite altimetry
卫星高度 [航] satellite altitude
高新卫星 and Astrophysics
谷歌高清晰卫星地图 Google Earth
高精度卫星导航定位 GNSS
先进极高频卫星 AEHF ; Advanced Extremely High Frequency
中高度卫星 medium altitude satellite ; intermediate-altitude satellite ; satellite medium-altitude
谷歌地图高清卫星地图 Google Earth Pro ; Google Ear
高通量卫星 HTS ; High Throughput Satellite
一些物体,比如一些旧的太空火箭或卫星碎片,在地球上以非常高的速度运动,速度如此之快,以至于一个非常小的碎片都能破坏重要的卫星或对宇航员造成危险。
Objects, like bits of old space rockets or satellites, move around the planet at very high speeds, so fast that even a very small piece can break important satellites or become dangerous to astronauts.
我们需要的是一个在赤道处地面上的非常高的塔,以及沿地球静止轨道绕地运转的卫星。
What we need is a really tall tower here on the ground right at the equator and a satellite in geostationary orbit.
在400公里高的轨道上,不推进的话,卫星的轨道寿命通常是几个月,200公里高度的轨道寿命是几周。
At 400 kilometers, orbital lifetimes are usually measured in a few months without re-boost. At 200 kilometers this drops to a few weeks.
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