Invention Grant
- Patent Title: Time shifted PN codes for CW LiDAR, radar, and sonar
- Patent Title (中): CW LiDAR，雷达和声纳的时移PN码
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Application No.: US13167093Application Date: 2011-06-23
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Publication No.: US08605262B2Publication Date: 2013-12-10
- Inventor: Joel F. Campbell , Narasimha S. Prasad , Fenton W. Harrison , Michael A. Flood
- Applicant: Joel F. Campbell , Narasimha S. Prasad , Fenton W. Harrison , Michael A. Flood
- Applicant Address: US DC Washington
- Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Current Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Current Assignee Address: US DC Washington
- Agent Andrea Z. Warmbier; Robin W. Edwards
- Main IPC: G01C3/08
- IPC: G01C3/08
Abstract:
A continuous wave Light Detection and Ranging (CW LiDAR) system utilizes two or more laser frequencies and time or range shifted pseudorandom noise (PN) codes to discriminate between the laser frequencies. The performance of these codes can be improved by subtracting out the bias before processing. The CW LiDAR system may be mounted to an artificial satellite orbiting the earth, and the relative strength of the return signal for each frequency can be utilized to determine the concentration of selected gases or other substances in the atmosphere.
Public/Granted literature
- US20110317147A1 Time Shifted PN Codes for CW LIDAR, RADAR, and SONAR Public/Granted day:2011-12-29
Information query
