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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Cited articles

Anderson, C., Conde, M., and McHarg, M. G.: Neutral thermospheric dynamics observed with two scanning Doppler imagers: 1. Monostatic and bistatic winds, J. Geophys. Res., 117, A03304, https://doi.org/10.1029/2011JA017041, 2012. 
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Aruliah, A. L., Griffin, E. M., Aylward, A. D., Ford, E. A. K., Kosch, M. J., Davis, C. J., Howells, V. S. C., Pryse, S. E., Middleton, H. R., and Jussila, J.: First direct evidence of meso-scale variability on ion-neutral dynamics using co-located tristatic FPIs and EISCAT radar in Northern Scandinavia, Ann. Geophys., 23, 147–162, https://doi.org/10.5194/angeo-23-147-2005, 2005. 
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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.