VIA Technologies EPIA SN-Series Specifications download pdf (Page 3)

Abstract

Remote sensing and photogrammetry are key technologies for several activities such

mapping, agriculture, land use or soil and air pollution monitoring. In this study an

airborne autonomous and fully automated system for photogrammetry and remote sensing

purposes is presented. State of the art technologies in this field have been reviewed, in

order to define a set of requirements needed to lead the develop of this new system. The

proposed solution demonstrates the feasibility of very high resolution image acquisition

(working in the visible portion of the electromagnetic spectrum, in the Red-Green-Blue

and nIR bands) from a standard equipped ultra light aircraft, without the need of any

specific navigation system or modifications to the aircraft structure. The camera system

geometry has been studied both in terms of number of elements and relative positioning.

A compatible hardware layout has been developed using industrial PC-boards, a GPS

receiver and an IMU, and a 3D CAD model of the whole system has been assembled. A

planning tool, partially based on the use of a geographical browser, was necessary to

generate typical multi-stripes flight trajectories used during photogrammetric campaigns,

and has been developed as part of this thesis.

An engineering model of the system, with reduced performances, has been designed

and assembled as a test bed for the final architecture and has been used during both

laboratory and flight tests. This prototype already implements the “tunnel in the sky”

visual interface which helps the pilot to follow the planned trajectory. Three flight

campaigns have been carried out aimed at understanding the system‟s functionalities and

at verifying the actual capability of reproducing the planned flight trajectories during

normal operations.

During the flight campaigns, high resolution images were acquired and post-

processing operations have been carried out creating mosaics from the acquired images

and presenting them using the above-mentioned graphical geobrowser.

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VIA Technologies EPIA SN-Series Specifications Page 3