NASA @NASA
Radio & GPS signals behave strangely when they travel through the polar cusp, a gap in Earth’s magnetic field. As spacecraft pass through this region, signals slow down. Our Cusp Region Experiment-2 sounding rocket mission is preparing to find out why: https://t.co/bprueM5N5E https://t.co/TcR0cN0Wfk — PolitiTweet.org