Computer Science – Performance
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apopt..32.4578s&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 32, no. 24, p. 4578-4585.
Computer Science
Performance
Laser Altimeters, Photodiodes, Photometers, Pulsed Lasers, Signal Processing, Accuracy, Background Noise, Error Analysis, Performance Tests
Scientific paper
The maximum measurement range of a laser altimeter can be extended by averaging the measurements from multiple laser shots at the same target. We present the principles of operation and design of such a multishot laser altimeter, which uses a Si avalanche photodiode detector. As an example, the performance of a spaceborne multishot altimeter containing components similar to those of the single-shot Mars Observer Laser Altimeter are given under operating conditions that would be encountered near Saturn. With 100-shot averages, we show that the multishot laser altimeter is capable of accurate ranging at fly-by distances of 10,000 km from an icy satellite. With 100-shot averages, the minimum optical signal level at a 90 percent correct-measurement probability under nighttime background is 9.8 detected signal photons per pulse as compared with 76 photons per pulse with a single shot.
Abshire James B.
Davidson Frederic M.
Sun Xiaoli
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