用SpaceX火箭发射的两颗欧洲双卫星利用全球定位系统信号研究地球的水循环,标志着欧空局第一次迅速、低成本的飞行任务。 Two European twin satellites launched on a SpaceX rocket to study Earth’s water cycle using GPS signals, marking ESA’s first rapid, low-cost mission.

2025年11月28日,由Vandenberg空间部队基地发射的两颗HydroGNSS双卫星乘SpaceX Falcon 9号火箭发射,作为运输者-15号乘载飞行任务的一部分。 On November 28, 2025, two twin HydroGNSS satellites launched from Vandenberg Space Force Base aboard a SpaceX Falcon 9 rocket as part of the Transporter-15 rideshare mission. 由欧洲航天局与萨里卫星技术有限公司开发的卫星利用全球导航卫星系统反射测量法,通过分析全球定位系统和伽利略系统反映的L波段信号,研究地球水循环。 Developed by the European Space Agency with Surrey Satellite Technology Ltd, the satellites use GNSS reflectometry to study Earth’s water cycle by analyzing L-band signals reflected from GPS and Galileo systems. 在相隔180度的轨道上,它们测量土壤湿度、积雪深度、海面条件和冻土状态,提供高分辨率数据,以改进气候和水资源监测。 Orbiting 180 degrees apart, they measure soil moisture, snow depth, sea surface conditions, and freeze-thaw states, providing high-resolution data to improve climate and water resource monitoring. 该飞行任务是欧空局第一个童子军项目,其运作预算为3 500万欧元,并有快速的三年发展时间表。 The mission, ESA’s first Scout project, operates under a €35 million budget with a rapid three-year development timeline. 卫星在轨道上和传输数据时均得到确认,标志着发射和早期运行阶段的成功。 Both satellites confirmed in orbit and transmitting data, marking a successful launch and early operations phase. 该航班还载有意大利的IRIDE环境卫星和希腊的ICEYE雷达卫星,支持灾害管理和环境监测。 The flight also carried Italy’s IRIDE environmental satellites and Greece’s ICEYE radar satellites, supporting disaster management and environmental monitoring.