Source: Geophysical Research Letters
The European Space Agency Earth Explorer mission Aeolus, launched in 2018, is the first with Doppler Wind Lidar onboard and provides measurements of global wind profiles twice a day. Žagar et al.  explore the impact of assimilating Aeolus winds on the European Centre for Medium Range Weather (ECMWF) analyses and forecasts in the tropics.
They compare experiments with and without the assimilation of Aeolus winds. The assimilation of Aelous winds leads to a different representation in the structure of Kelvin Waves. This leads to an improvement of the quality of the forecasts at the tropical tropopause layer. The forecast improvement is particularly strong in the period with a weak easterly Quasi-biennial Oscillation (QBO) in the month of May, likely due to corrections on the characteristics of the Kelvin Waves on these layers.
Citation: Žagar, N., Rennie, M., & Isaksen, L. . Uncertainties in Kelvin waves in ECMWF analyses and forecasts: Insights from Aeolus observing system experiments. Geophysical Research Letters, 48, e2021GL094716. https://doi.org/10.1029/2021GL094716
―Suzana Camargo, Editor, Geophysical Research Letters