Notes
Slide Show
Outline
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OPUS:

Online Positioning User Service
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WHAT IS OPUS?
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http://www.ngs.noaa.gov/OPUS
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OPUS Concept
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OPUS ŕ Datasheet Concept
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GPS data requirements
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metadata requirements
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OPUS registry
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quality control
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OPUS datasheet
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OPUS-DB benefits
  • Data submittal
    • Faster
    • cheaper
  • Consistent data processing
  • Improve maintenance of NSRS
    • Add GPS on bench marks
    • Archive PLSS corners?
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OPUS-DB limitations
  • GPS data only
  • PAGES software only
  • No direct tie to adjacent monuments
  • No redundancy
  • Reduced oversight
  • Idiot-proofing?
  • Field logs are not archived
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OPUS-DB data quality
  • Registered, trained users
  • 4+ hours of static GPS
  • OPUS error checking
  • NGS reviews each submittal
  • Datasheet includes:
    • “Caveat emptor” warning
    • Datasheet includes DQA statistics
    • Agency attribution
  • Coordinates: first, best, average
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Many Flavors of OPUS Planned
  • OPUS
          • $$$ receiver, hours of data
  • OPUS-DB
          • $$$ receiver, hours of data, share results
  • OPUS Projects
          • Multiple $$$ receivers, share results
  • OPUS Rapid Static
          • $$$ receiver, minutes of data
  • OPUS GIS
          • ˘˘ receiver, minutes of data