Articles | Volume 37, issue 6
Ann. Geophys., 37, 1095–1120, 2019
Ann. Geophys., 37, 1095–1120, 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.

Data sets

CHAMP accelerometer neutral wind observations M. Förster and E. Doornbos

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.