What question did this study set out to answer?

This research aims to evaluate the accuracy of GMS satellite winds in the Australian region.

February 5, 2026

A case study evaluation of ‘GMS winds’ in the Australian region

Key Points

This research aims to evaluate the accuracy of GMS satellite winds in the Australian region.
Evaluated GMS-I satellite winds over three days during a special observational period.
Compared winds within 220, 330, and 550 km of land-based wind stations.
Calculated root mean square errors with and without the level of minimum difference (LMD) for wind height accuracy.
Root mean square errors noted in both upper-level and lower-level winds.
Quality controls are necessary for accurate height assignment of winds.
With quality controls, GMS winds can enhance the Australian meteorological data base.

Abstract

Cloud-tracer winds from the GMS-I satellite are evaluated in the Australian region for a three-day period during the second Special Observing Period of the First GARP Global Experiment. The evaluation methodology is based on a comparison of GMS-1 winds which fall within the ranges of 220, 330 and 550 km of land-based. wind stations. Using the concept of a ‘level of minimum difference’ (LMD), the minimum expected root mean square (r.m.s.) errors are evaluated in the two broad categories of ‘upper-level’ and ‘lower-level’ winds. Root mean square errors in the absence of the LMD restriction are also calculated. The results highlight the necessity for quality controls on the data particularly in the height assignment of winds calculated using cirriform tracers. With such controls the GMS winds can usefully augment the data base for the Australian region.

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