Equatorial 150‐km irregularities observed at Pohnpei

First observations of meter‐scale equatorial 150‐km plasma irregularities outside the American longitude sector are reported. The observations conducted at Pohnpei (western Pacific) with a wind profiling ST radar demonstrate the feasibility of making ionospheric electric field measurements with low cost instruments and also reveal a potentially important anisotropy in the angular distribution of 150‐km VHF radar echoes.