A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is
A rawin of double lobe system has been designed so as to improve the observational accuracy. The minimum elevation angle is about 18 degrees, which may be lowered by a certain value, preventing the incidence of the reflected wave with a metal net. The accuracy above this limit is about 0.4 degree.doi:10.2467/mripapers1950.2.2_205 fatcat:7dfpy4tm7jbupgly3mukzg4jou