Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2008.480.488MobasheriM.R. Purbagher KordiS.M. FarajzadehM. Sadeghi NaeiniA. 3200883A great amount of efforts have so far been devoted to
the global determination of Total Precipitable Water (TPW) but little
work is directed toward the regional assessment of TPW using remote sensing
techniques. To increase the level of confidence in TPW assessment in the
local to regional scale using satellite imageries, a simultaneous in
situ measurement by radiosonde and satellite over passing were carried
out. The results show a high correlation (0.93) between radiosondes data
and the ratio of the two absorption band (narrow band to a wide band).
This in MODIS sensor is the ratio of channel 18 to channel 19. It is found
that the application of different algorithms via classification of the
atmosphere by its water vapor content and definition of threshold values
for TPW, may not work in the confined regions such as Tehran capital city
of Iran. The result of this study is presented through a conversion equation
like TPW (Real) = a.TPW18/19 + b. More work is required to
evaluate applicability of this equation for different seasons and different
states of the atmosphere.]]>Carlson, T.N., E.M. Perry and T.J. Schmugge,1990524569Chylek, P., C.C. Borel, W. Clodius, P.A. Pope and A.P. Rodger,20034127672770Frouin, R., P.Y. Deschamps and P. Lecomte,199029448460Frouin, R. and E. Middleton,19901990pp: 135139Hurley, P.,199433285294Jeffery, C.A. and P.H. Austin,20036016211631Kaufman, Y.J. and B.C. Gao,199230871884Kleespies, T.J. and L.M. McMillin,199029851862Menzel, W.P., S.W. Seemann, J. Li and L.E. Gumley,2002Version 6,pp: 1-39pp: 1-39Menzel, W.P., S.W. Seemann, J. Li and L.E. Gumley,20034210721091Mobasheri, M.R.,20042004Mobasheri, M.R.,20072007pp: 318pp: 318Rind, D., E.W. Chiou, W. Chu, J. Larsen and S. Oltmans et al.,1991349500503Rogers, R.R. and M.K. Yau,19961st Edn.,