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- W341726661 abstract "Since the beginning of 2000, the Geodetic Survey Division (GSD) of Natural Resources Canada (NRCan) has been playing a leading role in the North American Reference Frame (NAREF) Working Group of the IAG Commission X Subcommission for North America in support of the International GPS Service (IGS) initiative to densify the International Terrestrial Reference Frame (ITRF) in North America. Following the IGS distributed processing approach, NRCan has been computing three weekly regional solutions for Canada following IGS guidelines. Two such solutions are now being generated by GSD on a regular basis for redundancy and quality control, one for a 27 station network using GIPSY-OASIS II software and the other for a 65 station network using the Bernese GPS Software. In addition to the two GSD solutions, we have obtained others from NRCan’s Geological Survey of Canada ‐ Pacific Division for the 17 stations Western Canada Deformation Array and from the Scripps Institution of Oceanography for their 300 station Plate Boundary Observatory. These different regional solutions are being combined on a regular basis into a single NAREF weekly combination beginning with the first week of 2001. Some stations are included in more than one solution thereby providing redundancy checks and allowing for correct weighting of the different solutions relative to each other and to the IGS solutions. All regional solutions agree with each other at the few mm level while their final NAREF combination agrees with the official IGS solutions at the 3 mm level horizontally and the 4 mm level vertically. This is within the expected accuracy of the IGS solutions. By the middle of 2001 we plan to begin submitting weekly NAREF combinations to the IGS for eventual incorporation into the official IGS densification network. Later in the year, we expect to receive more regional solutions in order to make the NAREF network truly North American in scope." @default.
- W341726661 created "2016-06-24" @default.
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- W341726661 date "2001-01-01" @default.
- W341726661 modified "2023-09-23" @default.
- W341726661 title "The Naref initiative to densify the ITRF in North America" @default.
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