The airborne Na lidar and Christmas Island MF radar were used to measure the spectra of gravity wave density and wind perturbations during ALOHA-90 on the 25 March mission. Wave activity was especially strong near Christmas Island with measured wind variances between 1000 and almost 1400 (m/s)2. The vertical and meridional wave number spectra of horizontal wind perturbations exhibited power law shapes with slopes of -3.17 and -2.22, respectively. The temporal frequency spectrum appeared to be influenced by strong Doppler effects and had a shallow slope near -1. The magnitudes of the spectra were 4.9¿105 (m/s)2/cyc/m) at the vertical wave number 2&pgr;/(4 km), 8.4¿106 (m/s)2/(cy/cm) at the meridional wave number 2&pgr;/(200 km) and 7¿105 (m/s)2/(cyc/m) at the temporal frequency 2&pgr;/(1h). ¿American Geophysical Union 1991