EVALUATION OF ATTENUATIONS FOR MELTING SNOW AND THE MELTING LAYER Wei Zhangl, Erkki Salonenl and Seppo Karhul ABSTRACT Melting layer has been described with two melting particle models. The specific attenuation of melting snow, the average specific attenuation and the excess attenuation of the melting layer have been calculated by using two melting particle models and an approximate metho

TERRESTRIAL PROPAGATION EXPERIMENTS IN THE 11 - 30 GHz FREQUENCY BAND IN THE DUBNA-INTERCOSMOS INTERNATIONAL E.Alexandrova*, P.Georgiev*, EXPERIMENTAL AREA V.Pozhidayev***, A.Kavetzki**** V.Svjatogor**, ABSTRACT This paper presents the results from measurements on radio wave attenuation and depolarization in the 11, 20 and 30 GHz frequency bands along a 12.6 km terrestrial path, obtained by

MJLTIPA'IH EFFEX:TS OBSERVED OVER LCNG HOP EnLLY 'IERRAIN LINE-oF-SIGEn' MICRaiAVE LINKS .. D.NARAYANA RAO,S.V.BHASKARA .. +.. & M.J.KESAVA RAO,K.S.RAVI,K.K.REDDY """ MURrHY ABSTRACT : Microwave signal strength measurements have been carried out for a period of 3 years over two long hop line-of-sight microwave links situated in southern India between Elagiri-Tirumala and Pa11avaramTirumala o

60 GHz PROPAGATION MEASUREMENTS x x WITHIN A BUILDING G. Allen and A. Hammoudeh ABSTRACT This paper describes the fading characteristics of a 60GHz portable radio link operating in an indoor environment. The power spectra and the distributions of the fading envelopes are also presented. A simulation program has been developed and used to predict the fading envelopes. 

FADING REGIONS CURVES FOR THE 13 GHz FREQUENCY BAND AND CLIMATIC OF CZECHOSLOVAKIA + V Kvi~era ABSTRACT The contribution is devoted to draft of fading curves in the 13 GHz frequency band for the worst month and the average year in Czechoslovakia climatic regions. For the draft were employed the experimentally gained time distributions of rain intensities, proper practical method and results of

RADAR SOUNDING OF PLANETARY BODIES: AN INSTRUMENT DESIGN APPROACH Giovanni Picardi*, Roberto Seu* ABSTRACf A number of cornerstone missions have been planned by ESA and NASA for the observation of planetary bodies. Radar Altimeters are always considered as baseline instruments to be carried on the spacecrafts, given their suitability of retrieving informations about not only surface topography b

ACOUSTIC STUDIES SOUNDER AND ITS APPLICATION TO MICROWAVE PROPAGATION D.Narayana Rao*, K.S.Ravi*, T.R.Vijaya Kumar* and M.J.K.Murthy* ABSTRACT -------The Atmospheric Boundary Layer (ABL) which forms the lowest 1-2 km portion of the earth's environment has a significant role in the field of communications. In order to study the dynamical behaviour of the ABL and its effect on microwave propag

REMOTE SENSING OF THE SEA SURFACE AT 94 GHz R.Makaruschka, H. Essen * ABSTRACT Measurements on the backscatter properties of the sea surface have been performed with a coherent 94 GHz experimental monopulse radar. Different environmental conditions have been covered. The use of that type of radar allowed an extensive investigation of different aspects of sea clutter at that frequency band. Ra

TI-E AFFLICATIO\I CF AI~FT MI~VE IN \.EATl-ER MJDIFICATIO\I EXFERIJYENTS RADICJYETRIC T<:JYK:X:RAFHY A V V V V~ldaev*~ Yu V Melnichuk*~ A F Mironov*~ Dmitriev*~ A N Nikolski* Yu V Agapov*~ ABSTRACT Described is an airborne microwave radiometer system operated at 37.5 GHz which permits to obtain vertical cross-section of liquid water zones of clouds. Set of appropriate tomography-reconstruct

AN AIRBORNE MAPPING MICROWAVE RADIOMETER SYSTEM FOR SOIL MOISTURE Dr.G.ljjas* 1. ABSTRACT was developed Research Group system includes which An Airborne Microwave Radiometer System remote sensing applications by the Space Technical university of Budapest (TUB). The S-band microwave and thermal-infra radiometers, for of L, were goal of installed on a light pilatus-porter airplane. T