Structured Pc 1 pulsations are investigated using simultaneous multipoint ground-satellite observations recorded on September 10, 1986, during Viking orbit 1103. The multipoint Pc 1 observations were acquired using the Viking magnetic field experiment at 13,550 km altitude from L=5.1 to 5.5 and three Finnish ground stations at Rovaniemi, Ivalo, and Kilpisj¿rvi. These stations are all located within 30 min magnetic local time and 1¿ in latitude of the ionospheric field line footprint of the Pc 1 source field line. Structured Pc 1 pulsations, between 0.5 and 1.0 Hz were observed both on the ground and in space at similar frequencies, with similar frequency dispersion, and with a similar repetition period. The wave source region, based on Viking Langmuir probe observations, was just inside the plasmapause. The wave transit time between Viking and the ground was 12¿2 s, where Viking leads the ground. This implies that the waves propagate downward from Viking to the ground, consistent with previous downward Poynting flux estimates. ¿ American Geophysical Union 1996