SABER observations of mesospheric temperatures and comparisons with falling sphere measurements taken during the 2002 summer MaCWAVE campaign

• Published in: Geophysical research letters 2004-02, Vol.31 (3), p.L03105.1-n/a
• Main Authors: Mertens, Christopher J., Schmidlin, Francis J., Goldberg, Richard A., Remsberg, Ellis E., Pesnell, W. Dean, Russell III, James M., Mlynczak, Martin G., López-Puertas, Manuel, Wintersteiner, Peter P., Picard, Richard H., Winick, Jeremy R., Gordley, Larry L.
• Format: Article
• Language: English
• Subjects: Earth, ocean, space; Exact sciences and technology
• ISSN: 0094-8276; 1944-8007
• DOI: 10.1029/2003GL018605

The SABER instrument was launched onboard the TIMED satellite in December 2001. Vertical profiles of kinetic temperature (Tk) are derived from broadband measurements of CO2 15 μm limb emission, in combination with measurements of CO2 4.3 μm limb emission used to derive CO2 volume mixing ratio (vmr). Infrared emission from the CO2 ro‐vibrational bands are in non‐local thermodynamic equilibrium (non‐LTE) in the mesosphere and lower thermosphere (MLT), requiring new radiation transfer and retrieval methods. In this paper we focus on Tk and show some of the first SABER observations of MLT Tk and compare SABER Tk profiles with rocket falling sphere (FS) measurements taken during the 2002 summer MaCWAVE campaign at Andøya, Norway (69°N, 16°E). The comparisons are very encouraging and demonstrate a significant advance in satellite remote sensing of MLT limb emission and the ability to retrieve Tk under extreme non‐LTE conditions.