Altimetry and lidar using AlGaAs lasers modulated with pseudo-random codes

Details Altimetry and lidar using AlGaAs lasers modulated with pseudo-random codes Altimetry and lidar using AlGaAs lasers modulated with pseudo-random codes

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992lara.conf..441a&link_type=abstract

In NASA. Langley Research Center, 16th International Laser Radar Conference, Part 2 p 441-445 (SEE N92-31013 21-35)

Computer Science

Performance

Altimetry, Aluminum Gallium Arsenides, Canopies (Vegetation), Computer Programs, Computerized Simulation, Laser Altimeters, Lasers, Modulation, Optical Radar, Receivers, Scattering, Trees (Plants), Photons, Prototypes, Telescopes

Scientific paper

We have demonstrated a prototype laser altimeter and lidar which uses a low power AlGaAs laser modulated with a pseudorandom noise (PN) code, a 20 cm diameter telescope, and a photon counting receiver. Measurements to tree canopies over a 400 m horizontal path show strong signals with 5.3 mW average power and a 6.4 msec averaging time. Computer simulations predict lidar performance for various types of scattering performance.

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