第一层外壳：550 公里高度的 1,440 颗卫星。
第二层外壳：1,110 公里高度的2,825 颗卫星。
第三层外壳：340 公里高度的7,500 颗卫星。
首批 1,440 颗卫星将由 72 个轨道面组成，每个轨道面有 20 颗卫星，计划到 2024 年完成其他轨道面以提供实时宽带服务。
对于作为专用于全球宽带服务的卫星-地面网络的一部分的LEO卫星星座，从地面观测来看，应实施两类地面站点。
第一类是用户站（用户接入点），带有适当的碟形天线和收发器，用于锁定/解锁与卫星的通信。最初，用户将在 40° 的用户仰角下与卫星通信，但这可能会发生变化。Starlink已向 FCC（联邦通信委员会）提交请求，要求将用户的仰角降低 25° 而不是 40°，以改善接收效果。
第二类是地面站与卫星的运行、控制和维护有关。SpaceX 已向 FCC 申请在美国建立至少 32 个地面站，截至 2020 年 7 月 30 日已批准其中六个（在六个州）。出于这种奉献精神，卫星与三个测试地面站进行通信，以进行持续时间少于 10 分钟的短期实验，每天进行几次。专用于控制和操作的地面站通常与仰角为 10° 的卫星通信。
Starlink半径、速度、轨道周期和每日通过次数
Starlink三个外壳在不同设计仰角下与各自最大距离相关的单向时间延迟
Starlink三个外壳设计的 ( DHPW ) 的垂直平行距离 ( L DPHW ) 与基于等式的理想水平面 ( IHPW ) 相关
Starlink三个外壳的覆盖计算的第一步计算不同高度的天底角和中心角
Starlink三个外壳的覆盖卫星的覆盖范围
Starlink三个外壳的以成对的方位角和仰角
https://www.frontiersin.org/articles/10.3389/frcmn.2021.643095/full
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原文始发于微信公众号（太空安全）：Starlink天基卫星星座轨道壳详解
