“…Rayleigh lidars can provide useful information in this region (e.g., CHANIN and HAUCHECORNE, 1981;GILLE et al, 1991). In this region, however, observations on tides have come mainly from rocket experiments (e.g., BEYERS et al, 1966;BEYERS and MIERS, 1968;REED et al, 1969;GROVES, 1974GROVES, , 1975GROVES, , 1980. Most of these studies correspond to high and middle latitude regions and there is relative scanty information on tides in the equatorial middle atmosphere.…”