Application of Differential Global Positioning System (DGPS) Indexing to Remote Sensing Photogrammetry

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1999
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Wormley, Samuel
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

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In photogrammetry, radial displacement occurs when the point being imaged is not at the elevation of the mean datum. It is standard practice in photogrammetric mapping to provide 60% forward overlap and 30% sidelap between adjacent photographs. Such overlap is often required as the aircraft is subject to altitude variations, tip, and tilt as the flight proceeds. Differential GPS is used to minimize 3-D positional variations and provide precise indexing of the photographic exposures. This paper reports on the application of differential GPS to scientifically map the “uplight” emanating from the Ames, IA area, which serves to provide preliminary photogrammetry for Iowa State University engineering students working on Aerial Integrated Platform (AIP) senior projects. The data and it’s acquisition technique also serves as a model for low cost mapping of non-downward municipal and business lighting practices contributing to light pollution.

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Fri Jan 01 00:00:00 UTC 1999