@phdthesis{76000, author = {S. Polavarapu}, title = {Stratospheric and mesospheric data assimilation}, year = {2012}, journal = {Seminar on Data assimilation for atmosphere and ocean, 6-9 September 2011}, pages = {61-70}, month = {2012}, publisher = {ECMWF}, address = {Shinfield Park, Reading}, language = {eng}, }