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sample datasheet
sample datasheet


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IMPORTANT datasheet notes:

SCOPE: OPUS marks are not yet fully integrated with the NGS database (NGSIDB). Many more marks are available from the links below:

FORMAT: differs from traditional NGS datasheets in many ways, including:
  • POSITIONS are individually generated from non-redundant OPUS solutions. ERRORS MAY EXIST! Users are encouraged to favor stations observed multiple times and manually compare the positions, each available from the "See Also" link in the datasheet header.
  • ERROR CHECKING is the responsibility of the data publisher.
  • DATUM for ellipsoidal coordinates may differ from NGSIDB. Orthometric heights are derived from GPS and the geoid model used by OPUS.
  • FORMAT of coordinates differs from NGSIDB conventions
This 1st-generation datasheet is, essentially, a public OPUS solution report. We anticipate adding user-friendly features & enhanced integration with NGSIDB and our toolkit in future versions. Your comments are appreciated.

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publishing requirements
high-quality OPUS solution:
  • > 4 hour duration
  • > 70% observations used
  • > 70% ambiguities fixed
  • < 0.04m horizontal peak-to-peak
  • < 0.08m vertical peak-to-peak
  • < 0.03m RMS
  • IGS precise or rapid orbits (available next day)
  • see using OPUS
 descriptive metadata: field procedures:
  • fixed height tripod recommended
  • brace tripod with sandbags or chain
  • verify antenna height and plumb
  • calibrate your tripod or tribrach height & plumb
  • antenna type properly identified
  • antenna height > 0.1 m
  • more suggestions at HARN guidelines

published marks | register to publish | today's marks: Static  Rapid-Static