In: Wagner W., Székely, B. (eds.): ISPRS TC VII Symposium - 100 Years ISPRS, Vienna, Austria, July 5-7, 2010, IAPRS, Vol. XXXVIII, Part 7B 
(a) (b) 
(c) (d) 
Figure 5: Rain induced signal delay (in cm) for a rain rate of(a)5 
mm/h (b) 50 mm/h (c) 100 mm/h (d) 200 mm/h. 
Figure 4: Geometry used for Insar computations for a flat area in 
the presence of rain. 
Imai, I., 1950. On the velocity of falling drops, Geophys. Mag., 
vol. 21, pp. 244-249. 
Marshall, J.S. and Palmer, W.M., 1948. The distribution of rain 
drops with size, J. Meteorol., vol. 5, pp. 165-166. 
Moisseev, D.N., Hanssen, R.F. and van Leijen, F.J., 2002. Water 
vapor observations with SAR, microwave radiometer and GPS: 
comparaison of scaling characteristics, Proc. of the 6nd European 
Conference on Radar Meteorology, Delft, The Netherlands. 
Nelson, A.R. and Gokhale, N.R., 1972. Oscillation frequencies 
of freely suspended water drops, J. Geophy. Res., vol. 77, pp. 
2724-2727. 
Oguchi, T., 1983. Electromagnetic wave propagation and scat- 
terin in rain and other hydrometeors, Proc. IEEE, vol. 71, 
pp. 1029-1077. 
Pruppacher, H.R. and Beard, K.V., 1970. A wind tunned investi 
gation of the internal circulation and shape of water drops falling 
at terminal velocity in air, Quart. J. R. Met. Soc., vol. 96, pp. 
247-256. 
Spilhaus, A.F., 1948. Rain drop size, shape and falling speed, J. 
Meteorol., vol. 5, pp. 108-110. 
Zebker, H.A., Werner, C.L., Rosen, P.A. and Hensley, R.S., 1994. 
Accuracy of topographic maps derived from ERS-1 interferomet 
ric radar, IEEE Transaction on Geoscience and Remote Sensing, 
vol. 32, pp. 823-836. 
(c) (d) 
Figure 6: Resulting interferograms (a) rain free (b) 5 mm/h (c) 50 
mm/h (d) 100 mm/h.