Articles | Volume 37, issue 6
Ann. Geophys., 37, 1095–1120, 2019
https://doi.org/10.5194/angeo-37-1095-2019
Ann. Geophys., 37, 1095–1120, 2019
https://doi.org/10.5194/angeo-37-1095-2019
Regular paper
10 Dec 2019
Regular paper | 10 Dec 2019

Comparing high-latitude thermospheric winds from Fabry–Perot interferometer (FPI) and challenging mini-satellite payload (CHAMP) accelerometer measurements

Anasuya Aruliah et al.

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Short summary
Winds near the top of the atmosphere are expected to be the same at all heights for a given location by assuming high viscosity in rarefied gases. However, wind measurements from satellite drag at 350–400 km altitude were found to be up to 2 times larger than optical measurements at ∼240 km. Satellites provide global measurements, and ground-based FPIs provide long-term monitoring at single sites. So we must understand this inconsistency to model and predict atmospheric behaviour correctly.