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PROPAGATION OFREFRACTION ERRORSIN TRIGONOMETRIC
HEIGHT TRAVERSING ANDGEODETIC LEVELLING
G. A. KHARAGHANI
November 1987
TECHNICAL REPORT NO. 132
PREFACE
In order to make our extensive series of technical reports more readily available, we have scanned the old master copies and produced electronic versions in Portable Document Format. The quality of the images varies depending on the quality of the originals. The images have not been converted to searchable text.
![OVERVIEW OF OUTDOOR SOUND PROPAGATION · 17 in Ref. [1]). Sound prediction models, used for evaluating refraction in sound propagation include the FFP, (Fast Field Program) and PE](https://img.pdfslide.us/doc/110x75/60db345bb0af5c0a6b41ce96/overview-of-outdoor-sound-17-in-ref-1-sound-prediction-models-used-for-evaluating.jpg)
