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International Network of Global Fiducial Stations Science and Implementation Issues (1991) / Chapter Skim
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Appendix A: Review of Recent Studies
Pages 115-122

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From page 117...
... Mission to Planet Earth In 1988 the Task Group on Earth Sciences of the Space Science Board, National Research Council, produced a seminal report entitled Mission to Planet Earth. The primary research objectives of this mission are addressed in terms of four "Grand Themes," which are: 1.
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From page 118...
... These include, of course, determination and analysis of the geopotential fields, but also (Agnew et al., 19881: Over the next 20 years, major efforts in applying precise positioning techniques should be aimed primarily at: 1. Continued large-scale reconnaissance surveys with station spacing on the order of 102 km, to improve our understanding of the kinematic evolution of extensive, largely unexplored zones of continental deformation.
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From page 119...
... In order to study plate motion we need a global distribution of geodetic stations that measure relative positions to 1 cm over 1 day and to 1 mm over 3 months. In order to monitor regional and local deformation we need a terrestrial reference frame.
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From page 120...
... The proceedings of this workshop, summarized in Towards an Integrated System for Measuring Long Term Charges in Global Sea Level (Joint Oceanographic Institutions, 1990) , include a series of recommendations, grouped around the following topics: toward an integrated system, improving tide gauge networks, developing sea-level indices, continuing satellite measurements, developing the use of geodetic techniques, · long-term in situ measurements, · ice sheet measurements, and · developing appropriate models.
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From page 121...
... accurate to millimeter level and stable on time scales of decades is an essential component of a global change/sealevel monitoring system. The International Earth Rotation Service (IERS)
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Key Terms

  • solid earth
  • joint oceanographic
  • global distribution
  • ice masses
  • oceanographic institutions

  • kinematic gps
  • tide gauges
  • tectonically active
  • primary research
  • sea level

  • gravity coverage
  • dense networks
  • terrestrial reference
  • earth science
  • require technological

  • earth orientation
  • selective availability
  • current capabilities
  • earth sciences
  • monitoring regionally

  • describes five
  • hydrological cycle
  • minimal cost
  • local deformation
  • hole oceanographic

  • seminal report
  • global coverage
  • gps fiducial
  • station spacing
  • detailed recommendations


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