Accession Number : ADA304245

Title :   Modification of the Naval Postgraduate School Lidar System.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Gunal, Murat

PDF Url : ADA304245

Report Date : SEP 1995

Pagination or Media Count : 70

Abstract : Previous modifications were made to the Naval Postgraduate School (NPS) Lidar System to enable comparison of lidar returns with radiosonde vertical profiles. Inaccuracies due to flexing of the lidar mounting structure limited observation of correlation between lidar and balloon data. Reconstruction with anew telescope and integral mounting now provides stable overlap of laser illumination and receiver field-of-view while maintaining eye safety. This revised system permits more precise measurement of profile correlation. Both day and night lidar measurement series have been compared with concurrent radiosonde launches in the Monterey Bay area. Maximum ranges from clouds of greater than 3500 meters by day and greater than 5000 meters by night have been achieved. Within this range comparison can be made with moderate accuracy with the temperature and pressure profile boundary layer ceiling. Recommendations are made for future enhancement of sensitivity of correlation. (AN)

Descriptors :   *YAG LASERS, *RADIOSONDES, *TELESCOPES, SIGNAL PROCESSING, FIBER OPTICS, OPTICAL RADAR, LINE OF SIGHT, SYSTEMS ENGINEERING, OPTICAL DETECTION, MODIFICATION, SIGNAL TO NOISE RATIO, ATMOSPHERIC TEMPERATURE, REFRACTIVE INDEX, ACCURACY, THESES, BOUNDARY LAYER, VOLTAGE, OPTICAL DATA, ELECTROMAGNETIC WAVE PROPAGATION, BACKSCATTERING, ILLUMINATION, LASER BEAMS, METEOROLOGICAL DATA, CORRELATION, PROFILES, EYE SAFETY, LASER SAFETY, PHOTOMULTIPLIER TUBES, REMOTE DETECTION, ATMOSPHERIC REFRACTION, BACKGROUND NOISE, HUMIDITY, METEOROLOGICAL BALLOONS, NEODYMIUM LASERS.

Subject Categories : Lasers and Masers
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE