Based on zonally averaged TIDI meridional wind data from one yaw period (2004079 -140) during equinox, we examine the latitudinal and altitudinal distribution of the migrating diurnal and semi-diurnal tides using least squares fitting method to provide a global view of these tidal waves. The TIDI results are compared with Global Scale Wave Model 00 output for the month of April. The diurnal tide amplitude distribution and are in a good agreement. The TIDI results show a lower peak altitude (97 km) while GSWM00 peaks at 102 km. The vertical wavelength from the TIDI is about 20 km while the model predicts 25 km. The semi-diurnal tide comparisons are also reasonable. Both model and TIDI data show peak amplitudes at 45° latitude. The TIDI meridional winds compare very well with ground based meteor radar measurements at Maui. The zonal wind discrepancies are not unexpected.

Two‐day wave observations during January–March 2005 are reported using the recently launched Microwave Limb Sounder (MLS) aboard NASA's Earth Observing System Aura mission. Wave‐induced disturbances in temperature, water vapor, carbon monoxide, and MLS line‐of‐sight wind appear in early January, peak near the end of January, and persist until late February. Temperature and wind amplitudes as large as 9 K and 50 m/s are observed near 90 km. The wave disturbance is initially confined in the mid to low summer latitudes where the climatological summer easterly jet exhibits strong shear. The wave then develops features akin to the third Rossby‐gravity global normal mode, with a weak temperature disturbance in the winter hemisphere (anti‐symmetric about the equator) and wind disturbance over the equator. Strong wind perturbation episode around 17–23 January 2005 in the mid‐latitude Southern hemisphere coincides with a particularly intense solar proton event.

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