Echostar IV
赫鲁尼切夫国家航天科研生产中心 · 质子-K/DM-2M · 81/23 号发射台 (81L)
任务简介
Echostar 4 本应替换位于 119°W 的 EchoStar 1，后者随后将移至 148°W（该位置仅授予 EchoStar 24 个转发器）。发射后，卫星在太阳能帆板展开过程中出现异常（一个太阳能帆板的五个面板中有两个未能展开），导致多个转发器无法工作，因此 EchoStar 4 未能替换 EchoStar 1。1999 年 7 月，热控和燃料系统出现进一步异常。据报道，仅有 16 个转发器可运行。EchoStar 已申请推定全损，该卫星保额为 2.2 亿美元。1999 年 6 月，FCC 批准了移至 110°W 的请求，允许 EchoStar 从该位置开始广播。此前，FCC 已批准将 MCI 在 110°W 的许可证转让给 EchoStar。1999 年 5 月，EchoStar IV 出现影响转发器、加热系统和燃料系统的异常。1999 年 7 月，确认了额外的燃料系统异常。截至 2000 年 10 月 31 日，44 个转发器中共有 26 个失效；到 2002 年 6 月 30 日，38 个转发器失效，当时仅有 6 个转发器可用。目前该卫星作为在轨备份运行。2004 年 9 月，卡住的太阳能帆板自行展开。
原文
Echsostar 4 should have replaced EchoStar 1 at 119°W which would then have moved to 148°W (where only 24 transponders have been granted to EchoStar). After launch, the satellite has experienced anomalies in connection with solar panel deployment (two of five panels on one solar array have not unfolded). Therfore several transponders are not operational, so EchoStar 4 did not replace EchoStar 1. In Jul 1999 further anomalies with thermal control and fuel systems were reported. Only 16 transponders are reported to be operational. EchoStar has filled for constructive total loss of the satellite, which was insured for $220 million. In Jun 1999 the FCC approved a move request to 110°W to allow EchoStar to start broadcasting from there. Earlier the FCC granted to transfer of the 110°W licence of MCI to EchoStar. During May 1999, EchoStar IV experienced anomalies affecting transponders, heating systems and the fuel system. In July 1999, additional fuel system anomalies were confirmed. By 31 October 2000, a total of 26 transponders of 44 aboard failed and by 30 June 2002, 38 transponders had failed. Only six transponders were available for use at this time. Currently the satellite functions as an in-orbit spare. In September 2004, the jammed solar array deployed spontaneously.
飞行时间线 Flight Timeline0 节点
尚未公开时间线。
任务更新0 条
暂无任务更新。