发明名称 |
A PASSIVE TECHNIQUE FOR THE REMOTE DETECTION OF BURIED OBJECTS |
摘要 |
Technique for passively detecting the presence and location of an underground object (24). A plurality of individual antennas (32) positioned in a linear array are directed to receive fields of view which are mutually parallel in azimuth. The array (32) is focused at a plurality of different angles in azimuth for acquiring low level random noise signals which are emitted by the underground object (24) and by the intervening media (30). A radiometric receiver receives the noise signals acquired by each of the antennas as a separate channel, digitizes them and forwards them to a signal processor performing operations including: mathematical integration for each separate channel; generation of a plurality of simultaneous digitally synthetized electromagnetic fields of view; directing the electromagnetic fields of view at a plurality of different spatial angles; autocorrelation of each of the integrated channel responses; inverse Fourier transform on the result of autocorrelation operation; generating spectrograph therefrom presenting power as a function of frequency.
|
申请公布号 |
WO0037959(A3) |
申请公布日期 |
2000.11.09 |
申请号 |
WO1999US29111 |
申请日期 |
1999.12.08 |
申请人 |
NORTHROP GRUMMAN CORPORATION |
发明人 |
MCGILL, ROBERT, E. |
分类号 |
G01S5/02;G01S11/02;G01S19/48;(IPC1-7):G01S3/02 |
主分类号 |
G01S5/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|