satellite electronic countermeasures system 卫星电子对抗系统 satellite elevation卫星仰角 satellite emergency position indication radio beacon station 卫星紧急指位无线电信标电台 ..
The simulation results indicate that the pseudo-range remaining errors will be increased with the distance between base-station and GPS user and in the case of low satelliteelevation.
The authors then combined results based on these satellite data with criteria that make forests suitable for pandas, including elevation, slope incline and presence of bamboo.
The topography is from digital elevation data collected by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite.