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Proceedings Paper

WLRS streak camera equipment
Author(s): Stefan Riepl; Ulrich Schreiber; Wolfgang Schlueter
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Paper Abstract

This paper outlines the results of a streak-camera based timing device applicated to satellite laser ranging. By means of synchronizing the deflection voltage of the streak camera with the mode locking frequency of the Nd:YAG laser and locking both to a stable frequency standard, the streak camera represents a complete timing system allowing simultaneous measurements of absolute ranges in the IR and green wavelength domain. Furthermore it is possible to obtain high resolution differential range information from quasi simultaneous echoes from the two used laser frequencies. In addition to that, the laser can be operated in semi train mode compensating the shortcomings of the relative insensitive S1-Photocathode partly by integration of succeeding pulses. Operating the device in multi-photon- mode, yields a standard deviation of about 6ps for the centroid detection of gaussian shaped laser pulse. The analysis of the satellite laser ranging experiments show that this high precision can be reached in the earth to space propagation channel. Receiving the backscattered intensity distribution over time, the incoherent optical transfer function of the satellite retroreflector array can be reconstructed. This allows the comparison of the optical transfer functions of different satellites and an evaluation of target induced point spread functions in concern with the satellite and an evaluation of target induced point spread functions in concern with the satellite geometry. Moreover, looking at the shot by shot detected signal strength in both wavelengths, the correlation and coherence functions of the log amplitude fluctuations, which determine the satellite irradiance, can be measured.

Paper Details

Date Published: 22 December 1997
PDF: 12 pages
Proc. SPIE 3218, Laser Radar Ranging and Atmospheric Lidar Techniques, (22 December 1997); doi: 10.1117/12.295641
Show Author Affiliations
Stefan Riepl, Forschungseinrichtung Satellitengeodaesie/Fundamentalstation Wettzell (Germany)
Ulrich Schreiber, Forschungseinrichtung Satellitengeodaesie/Fundamentalstation Wettzell (Germany)
Wolfgang Schlueter, Bundesamt fuer Kartographie und Geodaesie/Fundamentalstation Wettzell (Germany)

Published in SPIE Proceedings Vol. 3218:
Laser Radar Ranging and Atmospheric Lidar Techniques
Ulrich Schreiber; Christian Werner, Editor(s)

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