发明名称 |
A METHOD OF MEASURING POINT-BLANK PASSING TIME OF AIRPLANE |
摘要 |
A terrain clearance measuring radio wave being emitted from an airplane is received, and changes in electric field intensity of the radio wave is input and recorded to a computer, whereby the time of occurrence of a sharply appearing peak value of the changes permits accurate measurement of the point-blank passing time, independent of flight frequency. <IMAGE> |
申请公布号 |
EP1357530(A1) |
申请公布日期 |
2003.10.29 |
申请号 |
EP20010271871 |
申请日期 |
2001.12.25 |
申请人 |
NITTOBO ACOUSTIC ENGINEERING CO.,LTD. |
发明人 |
OHHASHI, SHINJI;YAMASHITA, KOUICHI;HAYASHI, NAOKI |
分类号 |
G01S11/06;G01S13/94;G08G5/00 |
主分类号 |
G01S11/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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