@article{Forkman_2012, title={Six years of mesospheric CO estimated from ground-based frequency-switched microwave radiometry at 57° N compared with satellite instruments}, volume={5}, ISSN={1867-8548}, url={http://dx.doi.org/10.5194/amt-5-2827-2012}, DOI={10.5194/amt-5-2827-2012}, number={11}, journal={Atmospheric Measurement Techniques}, publisher={Copernicus GmbH}, author={Forkman, P. and Christensen, O. M. and Eriksson, P. and Urban, J. and Funke, B.}, year={2012}, month=nov, pages={2827–2841} }