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Cameras, laser, and AHRS on custom-built mount in Bandeirante camera port

Cameras, laser, and AHRS on custom-built mount in Bandeirante camera port.

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Cameras, laser, and AHRS on custom-built mount in Bandeirante camera port

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  1. Cameras, laser, and AHRS on custom-built mount in Bandeirante camera port University of Massachusetts digital video acquisition system, used for VOAM99 survey. OmniSTAR real-time, differential GPS signal (received once per second by Trimble 132 GPS(A) using externally mounted L-band receiver) was converted to SMPTE format by Horita GPS3 time code generator (B), for encoding at 30 frames per second on audio tracks of digital videotapes. GPS data was also used for continuous updating of flight track by GeoLink sofware on navigation computer (C). Wide-angle and zoom format videography acquired simultaneously by two Canon XL-1 digital camcorders(D) was recorded in mini-DV format using Sony GV-D900 Video Walkman VCRs (E). Distance from cameras to ground or vegetation canopy was measured with Laser Atlanta Advantage laser rangefinder(F) (wavelength 904 nm; sampling rate 238 Hz). Laser was set to record last return; beam width on the ground was about 1 m for average aircraft heights. Watson BA303 AHRS(G) (attitude and heading reference system) recorded tilt and tip of the camera mount 12 times per second. Data streams from laser, AHRS, and GPS/Horita were time-stamped and recorded by LabView software on flight data acquisition computer (H) for post-flight processing to integrate different sampling rates.

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