Tell a friend
Print
Simulation and high-precision wavelength determination of noisy 2D FabryâÂÂPérot interferometric rings for direct-detection Doppler lidar and laser spectroscopy
Hirschberger, Markus Christoph and Ehret, Gerhard (2011) Simulation and high-precision wavelength determination of noisy 2D FabryâÂÂPérot interferometric rings for direct-detection Doppler lidar and laser spectroscopy. Applied Physics B, online. DOI: 10.1007/s00340-011-4391-9.
 | There is a more recent version of this item available. |
![[img]](http://elib.dlr.de/style/images/fileicons/application_pdf.png) | PDF - Registered users only until July 2012 - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 1489Kb |
Official URL: http://www.springerlink.com/content/u3311lvg67060665
Abstract
Doppler wind lidar (DWL) measurements by the fringe-imaging technique in front of aircrafts at flight speed require rapid processing of backscattered signals. We discuss the measurement principle to derive the 3D wind vector from three line-of-sight (LOS) measurements. Then we simulate realistic fringe patterns of a FabryâÂÂPérot-interferometer (FPI) on a 2D charge-coupled device (CCD) localized at the focal plane behind it, taking atmospheric and instrument properties like scattering and noise into account. A laser at 355 nm with pulse energies of 70 mJ at 100 Hz repetition rate and a range bin of only 10 m were assumed. This yields count rates of 24 (13) million photons per pulse at 56 (76) m distance and 8.5 km altitude that are distributed on a CCD with up to 960ÃÂ780 pixels without intensification and therefore generate noisy pixel signals. We present two methods for the precise determination of the radii, i.e., wavelengths of these simulated FPI rings and show that both are suitable for eliminating pixel noise from the output and coping with fringe broadening by Rayleigh scattering. One of them proves to reach the accuracy necessary for LOS velocity measurements. A standard deviation of 2.5 m/s including center determination can be achieved with only 20 images to average. The bias is 7 m/s. For exactly known ring centers, each can be even better than 2 m/s. The methods could also be useful for high-resolution laser spectroscopy.
| Document Type: | Article | ||||||
|---|---|---|---|---|---|---|---|
| Title: | Simulation and high-precision wavelength determination of noisy 2D FabryâÂÂPérot interferometric rings for direct-detection Doppler lidar and laser spectroscopy | ||||||
| Authors: |
| ||||||
| Date: | 05 February 2011 | ||||||
| Journal or Publication Title: | Applied Physics B | ||||||
| Refereed publication: | Yes | ||||||
| In Open Access: | No | ||||||
| In SCOPUS: | Yes | ||||||
| In ISI Web of Science: | Yes | ||||||
| Volume: | online | ||||||
| DOI: | 10.1007/s00340-011-4391-9 | ||||||
| Status: | Published | ||||||
| Keywords: | Remote sensing, LIDAR and adaptive systems; Interference; Charge-coupled devices, image detectors, and IR detector arrays | ||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||
| HGF - Program: | Aeronautics | ||||||
| HGF - Program Themes: | L VU - Air Traffic and Environment | ||||||
| DLR - Research area: | Aeronautics | ||||||
| DLR - Program: | L VU - Air Traffic and Environment | ||||||
| DLR - Research theme (Project): | L - Air Traffic and Weather (old) | ||||||
| Location: | Oberpfaffenhofen | ||||||
| Institutes and Institutions: | Institute of Atmospheric Physics > Lidar | ||||||
| Deposited By: | Markus Hirschberger | ||||||
| Deposited On: | 14 Mar 2011 12:12 | ||||||
| Last Modified: | 26 Mar 2013 13:27 |
Available Versions of this Item
- Simulation and high-precision wavelength determination of noisy 2D FabryâÂÂPérot interferometric rings for direct-detection Doppler lidar and laser spectroscopy. (deposited 14 Mar 2011 12:12) [Currently Displayed]
Repository Staff Only: item control page
