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Proceedings Paper

Measuring atmospheric dispersion employing avalanche photodiodes
Author(s): Ulrich Schreiber; Wolfgang Maier; Stefan Riepl
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Paper Abstract

The accuracy of today's satellite laser ranging system is limited to a few cm. A significant part of this range error is due to the limitations of the atmospheric correction model. A dual color ranging experiment has been designed to investigate this source of error. When ranging to satellites at the fundamental and second harmonic frequency of a Nd:YAG laser, two different pulse round trip times are obtained simultaneously. The infrared pulse is detected by an avalanche photodiode, operated in the `Geiger mode', while the green pulse is recorded by a microchannel plate photomultiplier. For a given satellite pass, the jitter in recording the time of flight of the pulse is too high to calculate an atmospheric correction from individual measurements. Due to the many shots per satellite pass, the scatter can be significantly reduced by applying a nonlinear least squares fitting procedure to the data. The results of a large number of satellite passes are compared with the predictions of the Marini-Murray model.

Paper Details

Date Published: 9 December 1994
PDF: 9 pages
Proc. SPIE 2310, Lidar Techniques for Remote Sensing, (9 December 1994); doi: 10.1117/12.195848
Show Author Affiliations
Ulrich Schreiber, Fundamentalstation Wettzell (Germany)
Wolfgang Maier, Fundamentalstation Wettzell (Germany)
Stefan Riepl, Fundamentalstation Wettzell (Germany)


Published in SPIE Proceedings Vol. 2310:
Lidar Techniques for Remote Sensing
Christian Werner, Editor(s)

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