半同步軌道是指軌道週期為所環繞天體平均自轉週期一半,且運行方向與該天體自傳方向相同的軌道

對於地球而言,半同步軌道屬於中地球軌道的一種,週期略小於12小時。若為圓軌道英語Circular orbit,則其高度約為20200公里。[1][2]

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