Comment on "Migrating and Non-Migrating Tides Observed in the Stratosphere from FORMOSAT-3/COSMIC Temperature Retrievals" by Uma Das et al.

Abstract

The paper by Uma Das et al. presents a tidal analysis based on COSMIC temperature data derived during the years 2009 and 2010. The analysis uses the least-square fitting technique concerning the zonal wave number, the longitude, and considering a mean, a diurnal, semidiurnal and terdiurnal tidal as well as a stationary planetary wave component. The data is divided into two groups containing four micro satellites each with a third group containing all 6 satellites as comparison. The present study focuses on the investigation of different lengths of data sets and thus, their influence on each tidal component according to their generation, variability and potentially produced aliasing effects. The findings are relevant especially for the satellite community because they give evidence to new interpretation possibilities regarding the nature of