The phenomenon of space Charge Accumulation (SGA) of spacecraft will exhibit if it operates at its orbit-especially at high altitude orbit.
航天器表面在轨道运行中会出现电荷积累现象，尤其高轨道航天器这种现象更为严重。
When navigation accuracy is highly expected , the sensor with higher accuracy should be chosen and the observation time should be longer , especially in high - altitude orbit.
当对导航精度要求较高时，轨道越高，尤其在高轨道类型中，应尽可能的选择精度高的敏感器以及尽量长的观测时间。
The charge accumulation phenomenon on the surfaces of a spacecraft at a high altitude or geosynchronous orbit would appear.
处于空间电环境条件下的航天器表面会出现电荷积累，形成高的电势值。
The MEO satellites are used in the GNSS space segment and in future will still be the mainstay in this segment possibly with the addition of the HEO (High-altitude Earth Orbit) satellites.
全球导航卫星系统(GNSS)空间段采用MEO轨道卫星，未来将仍然以MEO为主，可能有HEO轨道卫星加入运行。
The MEO satellites are used in the GNSS space segment and in future will still be the mainstay in this segment possibly with the addition of the HEO (High-altitude Earth Orbit) satellites.
全球导航卫星系统(GNSS)空间段采用MEO轨道卫星，未来将仍然以MEO为主，可能有HEO轨道卫星加入运行。
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