Dissertation > Excellent graduate degree dissertation topics show

Comparison and Analysis of Measurement Performance Simulation of Space-borne Wind Lidar Based on Lodine and F-P Filter

Author: YuCuiRong
Tutor: LiuZhiShen
School: Ocean University of China
Course: Detection and processing of marine information
Keywords: Spaceborne lidar Fabry-Perot frequency discriminator Iodine molecular frequency discriminator Horizontal distance resolution
CLC: TN958.98
Type: Master's thesis
Year: 2010
Downloads: 95
Quote: 1
Read: Download Dissertation

Abstract


Spaceborne lidar is the most effective means of global three-dimensional wind field, provides a strong complement of data for numerical weather forecasting, atmospheric dynamics. Take into account the cost of the satellite launch, the preliminary study is very important, software simulation is important, the European Space Agency (ESA, European Space Agency), NASA (NASA, National Aeronautics and Space Administration) spaceborne lidar preliminary simulation study. This thesis is focused on the performance simulation of spaceborne lidar measurements. The two non-coherent detection lidar frequency discriminator is the frequency discriminator of Fabry-Perot (FP) frequency discriminator and iodine molecules, this article will simulate two systems (355nm FP intersection of the frequency discrimination spaceborne system and 532nm iodine molecules Kam frequency the spaceborne system), combined with other hardware parameters, respectively, simulation and analysis, and simulation results to make a comparison of the two systems. The paper begins with a brief analysis of the status of international spaceborne lidar system simulation. And then describes the interaction of the atmosphere with the laser, the lidar principle, and the detection method, etc., and the principle of the frequency discriminator in the FP frequency discriminator and iodine molecules are discussed respectively. Followed by analysis of the technical issues involved in spaceborne simulation software, including atmospheric model, laser radar system parameters (transmitter and receiver system) is selected, the satellite platform and data processing methods. In the papers the main part of that measurement performance simulation theory first quantitative comparative analysis of the the the FP frequency discriminator and iodine molecules Kam frequency potential is borne system measurement performance results show that the height range of 0-5km especially aerosol content rich regions, molecular iodine frequency discriminator has the obvious advantage of measuring height (in more than 5km aerosol content of the basic zero area), molecular iodine and FP frequency discriminator wind speed measurement error ratio of about 4 : 3. Second the simulation of the two frequency discriminator spaceborne system. FP frequency discriminator system to verify the feasibility of the FP simulation algorithm, first spaceborne lidar system ESA developed ALADIN FP frequency discriminator module simulation, simulation results, and the ESA study results in 3-20km height within the basic agreement; 355nm FP intersection of spaceborne system simulation, the simulation results show that the wind speed of 20 km at the level of wind farms accuracy of 3 m / s 355nm laser average power of 15W, two scanning angle accumulated 900 pulses each corresponding level distance resolution of 130km. For the iodine molecules Kam frequency system, in order to verify the credibility of the iodine molecular modeling algorithm first Ocean University of China Car lidar system simulation, analog echo and inversion wind farm a good agreement with the measured data ; 532nm molecular iodine the frequency discriminator spaceborne system simulation, the simulation results show that two of the scan angle of each cumulative 1300 pulses at 532nm laser average power of 35W, the wind speed of 20 km at the level of wind farms accuracy of 3m / s, corresponding to the level of distance resolution of 180km. Finally, the above measurement performance simulations and engineering requirements, a comprehensive comparative analysis of the iodine molecules Kam frequency and FP frequency discriminator performance, provides a strong basis for future spaceborne lidar system options .

Related Dissertations

  1. Airborne LiDAR Filtering by Fusing Multi-features,TN958.98
  2. Minicomputer contains three-dimensional imaging laser radar system is a key technology research,TN958.98
  3. One -dimensional pulsed laser radar echo signal generator design,TN958.98
  4. Airborne lidar underwater target detection technology,TN958.98
  5. Study on Data Filtering and Building Extraction of Airborne LIDAR Data,TN958.98
  6. Study on the Backscattered Singals of Laser Radar,TN958.98
  7. Research on LADAR Based Road and Obstacles Detection,TN958.98
  8. Infrared Micro-Pulse Lidar System Development,TN958.98
  9. The Design of High Speed Signal Sampling and Processing System for Lidar,TN958.98
  10. Reserch on System of No-Scanning Imaging Ladar,TN958.98
  11. The Algorithm and Simulation Study of Directly Detect Synthetic Aperture Laser Radar,TN958.98
  12. The Research of the Sheltered Target Imaging Using Chirped Amplitude Modulation Ladar Based on GM-APD,TN958.98
  13. Coherent laser radar intensity image edge detection algorithm and performance evaluation simulation,TN958.98
  14. Research of Error Calibration Methods of Airborne Lidar System,TN958.98
  15. Study of Controlling Method of Data Quality Based on the Domestic Aoe Airborne Lidar,TN958.98
  16. Development of a Compact Mie Lidar and Its Applications,TN958.98
  17. Study of High Precision Rotational Raman Lidar for Atmospheric Temperature Profiles,TN958.98
  18. Study of the Technology of Data Acqusition and Visualizing of Lidar with High Speed and Resolution,TN958.98
  19. Research of Frequency Discrimination on EDGE for a Doppler Wind Lidar,TN958.98
  20. Study on Optical Systems of Automobile Lasers Defending Lidar,TN958.98

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar: institutional sub- > Optical positioning radar,laser radar
© 2012 www.DissertationTopic.Net  Mobile