| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the likelihood ratio of acquisition data, by simultaneously measuring received radio waves and the conditions in front of an antenna in reception, in the measurement of the arrival direction of the radio waves. SOLUTION: A motor 13 is operated by an antenna rotation-control apparatus 14, and a directional antenna 1 mounted to a substrate 12 is rotated to receive radio waves. After the reception signal is amplified by a low-noise amplifier 15, the signal is converted into digital data by an A/D converter 16. A camera 18 for imaging static images or moving images is mounted to the directional antenna 11 to photograph the front of the directional antenna 11, and the photographed images are outputted to an image-processing apparatus 19 and a monitor 20. The image-processing apparatus 10 converts the image into digital information. Information, for indicating the direction where the directional antenna 11, is directed from the antenna rotation-control apparatus 14, a reception radio wave signal from the A/D converter 16, and digital image information from the image-processing apparatus 19 are recorded in a recording apparatus 17.</p> |
