[hacker news] All Four Sentinel-1 Satellites Are Now Live]

摘要

All Four Sentinel-1 Satellites Are Now Live]

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本文首发于 hacker news。

阅读原文：[All Four Sentinel-1 Satellites Are Now Live]](https://orbitaltoday.com/2026/05/03/all-four-sentinel-1-satellites-are-now-live-and-europes-earth-watch-just-got-stronger/)