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Evolving the Geodetic Infrastructure to Meet New Scientific Needs (2020) / Chapter Skim
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8 Priorities for Maintaining and Enhancing the Geodetic Infrastructure
Pages 83-88

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From page 83...
... . Questions on sea-level rise, terrestrial water cycle, The TRF accuracy and drift requirements are and geological hazards require improvements in the somewhat less stringent for the terrestrial water cycle accuracy and stability of the TRF.
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From page 84...
... Second, modeling of the center of mass in real-time and better than 0.12 m post processing. motions expected over the next 100 years, due to the Orbit determination requirements for InSAR melting of the Greenland and Antarctic ice sheets, satellites are driven by terrestrial water cycle (Objecproduces a large drift that can be monitored only if tives H-2c, S-6a, and S-6b)
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From page 85...
... For example, GNSS appligauges need to have co-located GNSS receivers that cations connected to the terrestrial water cycle, geologiare part of this network. Reflectometric GNSS receiver cal hazards, atmospheric monitoring, and ecosystems installations can augment traditional tide gauges by si- require access to software for modeling or utilizing multaneously measuring sea level and vertical land mo- high-quality GNSS clocks and orbits, antenna phase tion (Objective C-1a)
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From page 86...
... . cies to achieve their imaging requirements, the avail Time-variable surface deformation models are ability of accurate orbits has enabled fully automated associated with numerous processes, including plate processing and accurate geolocation, which increases motions, large earthquakes, elastic loading from ocean the exploitation of the large data sets being collected tides, ice loss, redistribution of surface water, atmo- by Decadal Survey missions.
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From page 87...
... have sufficient capacity to handle the increased load. Ground-based GNSS is essential for achieving the Decadal Survey science objectives related to sea level, REFERENCE cryosphere, terrestrial water cycle, weather, climate, Altamimi, Z., P
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Key Terms

  • terrestrial water
  • water cycle
  • science questions
  • geological hazards
  • decadal survey

  • reference frame
  • survey science
  • satellite orbits
  • gnss service
  • core gnss

  • terrestrial reference
  • international gnss
  • gnss stations
  • gnss network
  • water vapor

  • motions expected
  • gravity missions
  • radar altimetry
  • dedicated gravity
  • trf accuracy

  • radio occultation
  • station network
  • including plate
  • close collaboration
  • surface deformation

  • sea level
  • fundamental sites
  • hazards science
  • gnss monumentation
  • gnss buoys


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