caa a22 4500 44536792X CHVBK 20180317142936.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s00340-011-4391-9 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4391-9 Simulation and high-precision wavelength determination ofnoisy2D Fabry-Pérot interferometric rings for direct-detection Dopplerlidar and laser spectroscopy [Elektronische Daten] [M. Hirschberger, G. Ehret] 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 Fabry-Pérot-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 355nm with pulse energies of 70mJ at 100Hz repetition rate and a range bin of only 10m were assumed. This yields count rates of 24(13) million photons per pulse at 56(76)m distance and 8.5km altitude that are distributed on a CCD with up to 960×780 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 2.5m/s including center determination can be achieved with only 20 images to average. The bias is 7m/s. For exactly known ring centers, each can be even better than 2m/s. The methods could also be useful for high-resolution laser spectroscopy. Springer-Verlag, 2011 Hirschberger M. Institut für Physik der Atmosphäre (IPA), Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Münchner Str. 20, 82234, Wessling, Germany aut Ehret G. Institut für Physik der Atmosphäre (IPA), Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Münchner Str. 20, 82234, Wessling, Germany aut Applied Physics B Springer-Verlag 103/1(2011-04-01), 207-222 0946-2171 103:1<207 2011 103 340 https://doi.org/10.1007/s00340-011-4391-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4391-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hirschberger M. Institut für Physik der Atmosphäre (IPA), Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Münchner Str. 20, 82234, Wessling, Germany aut NATIONALLICENCE 700 1- Ehret G. Institut für Physik der Atmosphäre (IPA), Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Münchner Str. 20, 82234, Wessling, Germany aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 103/1(2011-04-01), 207-222 0946-2171 103:1<207 2011 103 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer