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Improving the National Spatial Reference System
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2010
[PDF-657.91 KB]
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Description:The future of positioning is GNSS. The underlying reference frames for all GNSS systems are geocentric. The International Terrestrial Reference Frame (ITRF), used for globally consistent scientific applications such as the determination of sea level change, has gotten progressively more geocentric over the last ten years, so that now the origin of the ITRF coincides with Earth’s center to about 1 centimeter of accuracy. Furthermore, countries are increasingly choosing GNSS as their primary tool to access a vertical datum, minimizing their reliance upon unmonitored passive control.
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Rights Information:CC0 Public Domain
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Compliance:Submitted
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