Mystery GPS jammer in Iran becomes test for NASA satellites’ capabilities
摘要
NASA卫星在观测飓风风速和冰盖崩塌的同时，展现出定位GPS干扰器大致位置的能力。一项实验利用两套NASA卫星系统，成功将伊朗境内一个神秘GPS干扰器的位置锁定在数公里范围内。此类干扰器通过强信号压制GPS卫星信号。尽管卫星无法实现近实时监控或精确定位，但识别干扰器大致位置有助于航空和航运规划高风险区域。
NASA satellites designed to observe cyclone wind speeds and collapsing ice sheets have also proven capable of identifying the approximate locations of GPS jammers. That could help monitor high-risk areas for aircraft and ships navigating the growing prevalence of GPS interference worldwide.
Two different NASA satellite systems showed how they could locate a known but mysterious GPS jammer within several kilometers of its position in Iran, according to an experiment by Sean Gorman, CEO and cofounder of the location-based technology company Zephr.xyz that was detailed in the magazine GPS World. Such jammers use strong signals to overpower the weaker radio signals coming from US-operated GPS satellites and other global navigation satellite systems.
Such NASA satellites cannot perform “near-real time monitoring” or pinpoint the exact location of GPS jammers, said Clara Chew, principal scientist and lead of the GNSS systems and data team at the California-based satellite manufacturer Muon Space, who was not involved in the study. But Chew told Ars that identifying the approximate locations of GPS jammers “could potentially be helpful for flight planning” or for “indicating high risk areas for maritime shipping.”
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