During eleventh Antarctic Expedition in Nov. 1991/March 1992 ____ was installed.
A. SODAR (SOnic Detection And Ranging)
B. Second Permanent Station ‘Maitree’
C. First permanent station ‘Dakshin Gangotri’
D. None of the above
Answer: Option A
SODAR (SOnic Detection And Ranging), also written as sodar, is a meteorological instrument also known as a wind profiler which measures the scattering of sound waves by atmospheric turbulence.