To readily specify a propagating azimuth of reflected waves to reduce failures caused by reflected waves of radio waves.
A time domain for receiving and analyzing unnecessary reflected waves is measured while a measuring system is moved, a propagation path of radio waves is geometrically analyzed by ray tracing, a propagation path is specified from the measurement result and the analysis result, and the data is read (130). Next, an angle of an azimuth indication driving section is changed. Namely, an azimuth is found as to a straight line connecting the position coordinate of a reflecting point and the azimuth indication driving section, an attack angle and a rotation angle are computed regarding a radiating azimuth of a laser beam, and data is sent so as to drive an attack angle drive and a rotation angle drive by the computed attack angle and rotation angle (132, 134). Subsequently, a part around a reflected part is illuminated by turning on a light source. Therefore, an operator can visually confirm the reflected part.
HARAKAWA KENICHI
SAITO TOSHIO
KUNISHIMA TAKESHI
YOSHIMURA KENICHI
IWATA TAKEO
SHIMA KIMITOKI
TAKADA JUNICHI
TAKENAKA DORO KK
TAKADA JUNICHI
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