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UPDATE 06-03-2025 更新 06-03-2025
Based on NOAA’s requirement to responsibly manage on-orbit assets, NOAA will commence with decommissioning activities immediately for NOAA-18. The exact date/time of decommission is not yet determined and is pending completion of pre-decommission processes. Users are advised to discontinue use of all NOAA-18 science products immediately.
根据诺阿负责任地管理在轨资产的要求，诺阿将立即开始诺阿-18 的退役活动。确切的退役日期/时间尚未确定，有待退役前流程的完成。建议用户立即停止使用所有 NOAA-18 科学产品。
NOAA has officially initiated the decommissioning activities for the NOAA-18 satellite. This process aims to safely remove the aging spacecraft from active service and mitigate any potential risks, such as the creation of orbital debris.
诺阿已正式启动诺阿-18 号卫星的退役活动。这一过程旨在安全地让老化的航天器退出现役，并降低任何潜在风险，如产生轨道碎片。
While the agency has begun the necessary steps, the precise date and time of the satellite’s full decommissioning are not yet finalized. This is contingent upon the successful completion of a series of “pre-decommission processes.” These preliminary steps typically involve:
虽然该机构已开始采取必要步骤，但卫星完全退役的确切日期和时间尚未敲定。这取决于一系列 "退役前流程 "的顺利完成。这些初步步骤通常包括
- System Safing: Disconnecting batteries, disabling transmitters, and depleting propellants (like nitrogen gas) to make the satellite inert and prevent uncontrolled breakups.
系统安全：断开电池连接、关闭发射机、耗尽推进剂（如氮气），使卫星成为惰性，防止失控解体。 - Data Transition: Ensuring that all critical data streams from NOAA-18 are successfully transferred to newer, more advanced satellite constellations, such as the Joint Polar Satellite System (JPSS). NOAA-18, along with NOAA-15 and NOAA-19, has been in an “Extended Life” program, transitioning to a commercial ground system for continued operation as “data of opportunity,” but this will cease.
数据转换：确保 NOAA-18 的所有关键数据流成功转移到更新、更先进的卫星星座，如联合极地卫星系统 （JPSS）。NOAA-18 以及 NOAA-15 和 NOAA-19 一直处于 "延寿 "计划中，过渡到商业地面系统，作为 "机会数据 "继续运行，但这一计划将停止。 - Operational Handover: Shifting any remaining operational responsibilities or data product generation to other active satellites or ground systems.
运行移交：将任何剩余的运行责任或数据产品生成工作移交给其他现役卫星或地面系统。 - Final Orbital Maneuvers (if applicable): While not always a de-orbit for end-of-life satellites like NOAA-18 (which will likely remain in orbit but be inert), some decommissioning processes might involve maneuvers to place the satellite in a safer, less congested orbital path.
最后轨道机动（如适用）：对于 NOAA-18 这样的报废卫星来说，虽然不一定都是离轨（很可能会留在轨道上，但会是惰性的），但有些退役过程可能会涉及将卫星置于更安全、拥堵程度更低的轨道路径上的操作。 - Compliance Checks: Verifying that all decommissioning procedures adhere to national and international guidelines for space debris mitigation.
合规性检查：核查所有退役程序是否符合国家和国际空间碎片减缓准则。
The delay in setting an exact decommission date allows NOAA to meticulously execute these pre-decommissioning tasks, ensuring a smooth transition and minimizing any potential disruptions to weather forecasting and environmental monitoring services.
推迟确定确切的退役日期使诺阿能够一丝不苟地执行这些退役前任务，确保平稳过渡，并最大限度地减少对天气预报和环境监测服务的潜在干扰。
Please also note the NOAA-18 STX-4 S-band downlink transmitter (dropped from 7 Watts down to 0.8 Watts), that surfaced over the weekend (May 31), and is resulting in considerable imagery degradation. Users are advised to discontinue use of all NOAA-18 products immediately.
还请注意上周末（5 月 31 日）出现的 NOAA-18 STX-4 S 波段下行链路发射机（从 7 瓦特降至 0.8 瓦特），该发射机导致图像严重衰减。建议用户立即停止使用所有 NOAA-18 产品。
