476 (Continued) 
of Applied Geophysics, and the Institute of Physics of the Atmosphere (IFA). 
Now under IFA are the Loparskaya, Lutsino, Roshchino, Severnaya, Tsimlyansk, 
and Northern research stations. Three of the Institute's laboratories are 
the Laboratory of Acoustics of the Atmosphere, the Laboratory of Atmospheric 
Optics, and the Radiophysics Laboratory. 
As the existence of the Radiophysics Laboratory indicates, the 
propagation of radio waves through the atmosphere is a major interest at 
the Institute. There have been various investigations into the effect of 
turbulence on the propagation of radio waves, the reflection of radio waves 
by the aurora, and the reflection of radar beams by the aurora. Other 
important studies have been concerned with corpuscular radiation in the 
higher atmosphere. 
A very important area of research is atmospheric optics. There 
have been studies of the scattering of light in the atmosphere, the emission 
of the aurora, and electrophotometric measurement of the aurora borealis. 
A. Ya. Driving, et. al., have developed the "searchlight method" for deter- 
mining stratification in the atmosphere, and V. S. Prokudina has used spec- 
troscopic means to determine the temperature of OH in the upper atmosphere. 
A portion of the Institute’s work is devoted to the study and 
forecasting of weather. An acoustic thermometer is used to determine the 
temperature of the air at 25 to 30-km altitude. The instrument was designed 
and built at the Institute and operates by measuring the speed of sound in 
the atmosphere at various altitudes. 
The Institute publishes a Trudy. 
LTT 
Name: Institute of Physics of the Earth imeni O. Yu. Shmidt 
(Institut fiziki zemli imeni O. Yu. Shmidta--IFZ) 
Address: Moscow, Bol'’shaya gruzinskaya ulitsa, 10 
Director: M. A. Sadovskiy, Corresponding Academician (U.S.S.R.) (1960) 
Deputy Directors: Ye. A. Koridalin, Candidate (1960) 
Ye. V. Karus, Professor (1960) 
Administrative Affiliation: Academy of Sciences, U.S.S.R. (1962) 
Selected Staff Members: 
O. M. Barsukov 
V. V. Belousov, Corresponding Academician (U.S.S.R.), Head of 
Department of Tectonics 
I. S. Berzon, Professor, Head of Department of Seismic Methods 
Ye. S. Borisevich, Doctor 
Y. D. Bulanzhe, Professor 
