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The use of static global positioning system (GPS) equipment for accurate horizontal & vertical positioning in field geology operations at high latitudes is made difficult by the need to set up & operate a GPS reference station and limitations on the distance between the reference station & field GPS due to errors introduced by the ionosphere. Dual-frequency GPS receivers have the potential to eliminate these problems since they can eliminate ionospheric errors and thereby increase baseline lengths, thus potentially permitting the use of existing GPS reference stations. This paper describes the use of a dual-frequency receiver for establishing benchmarks along the Yukon River as a field trial of this technology. Field methods and post-processing of the data using GPS data from permanent receiving stations are described, and baseline results are presented. The derived benchmarks will be applied to a survey of fill thickness below the Yukon River.
Wilks provides a historical background, list of publications, and description of activities for most of the major science initiatives undertaken at the federal level. He surveys a wide range of government documents and monographic and serial science collections used by both faculty and students.
This edition of "The Canadian Encyclopedia is the largest, most comprehensive book ever published in Canada for the general reader. It is COMPLETE: every aspect of Canada, from its rock formations to its rock bands, is represented here. It is UNABRIDGED: all of the information in the four red volumes of the famous 1988 edition is contained here in this single volume. It has been EXPANDED: since 1988 teams of researchers have been diligently fleshing out old entries and recording new ones; as a result, the text from 1988 has grown by 50% to over 4,000,000 words. It has been UPDATED: the researchers and contributors worked hard to make the information as current as possible. Other words apply ...
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