Аннотация:We measured and simulated frequency-angulardistribution of terahertz emission from the plasma channel of asingle-color filament biased by electrostatic field. Pronounced onaxismaximum of terahertz emission was observed for the electricfield above 3.2 kV/cm. Directional diagrams of frequencies <1 THzreveal a flat-top shape due to the constructive interference ofterahertz waves emitted by dipole local sources.