Using a new antenna configuration and new data processing hardware, we probed the electrojet with unprecedented spatial resolution in January 1991 at Jicamarca. The altitude resolution was 125 m, and the east-west antenna beamwidth was about 0.6¿, or about 1 km at electrojet altitudes. The high spatial resolution allowed us to observe, at certain altitudes and times, pronounced wavelike structures with vertical wavelengths of the order of 1 km and periods of tens of seconds. These observations closely resemble the predictions of recent nonlocal, nonlinear numerical simulations of large-scale turbulence in the equatorial electrojet (Ronchi et al. , 1991). The comparison demonstrated the validity of the theory and confirmed the idea that the Doppler power spectra of type 2 echoes at 50 MHz (due to 3-m plasma waves generated by the gradient-drift instability and a nonlinear cascade of energy from long-wavelength modes to short) are controlled primarily by the large-scale dynamics and not by the nonliner local growth and decay rates of the 3-m waves themselves. ¿ American Geophysical Union 1994