In addition to an overall quasi-periodic 24 hour cycle, the ionosphere features many irregular disturbances. The detailed structure and dynamical evolution of the ionosphere continues to be one of the largest unpredictable factors in GNSS measurements. Across local area networks, however, the total electron content on the line of sight between the stations of a network and a given satellite is highly correlated between the stations due to the proximity of the signal rays as they propagate through the ionosphere.
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GIS Weekly Magazine
Susan Smith
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Look for the next issue of GIS Weekly Magazine on May 28, 2012.
Each GISWeekly Review delivers to its readers news concerning the latest developments in the GIS industry, along with a selection of other articles that we feel you might find interesting. |
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