Evolving the Geodetic Infrastructure to Meet New Scientific Needs (2020) / Chapter Skim
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1 Introduction
1 Introduction
Pages 9-18
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From page 9... ...
Underpinning infrastructure are also needed to analyze high-precision these space observations and their interpretation is the data from a variety of satellite sensors. Understanding geodetic infrastructure and its data products, notably what improvements to the geodetic infrastructure and the International Terrestrial Reference Frame (ITRF)
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assessed the benefits of the geodetic infrastructure and seeking to answer questions that require an accurate recommended improvements to meet user demands terrestrial reference frame. The workshop had two for increasingly greater precision.
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The orbit accuracy depends on the accuracy of the tracking system as well as the accuracy of the terrestrial reference frame. Because accurate orbits are essential for several Decadal Survey satellite missions, combined Global Navigation Satellite System (GNSS)
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3. Discuss the elements of these science questions that drive future requirements for the terrestrial reference frame, Earth-orientation parameters, and satellite orbits, and identify what geodetic infrastructure changes are needed to help answer the questions.
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Greenland -15 -50 -80 Sum 1995 2001 2004 2010 2013 2016 -25 1994 1998 2002 2006 2010 2014 2020 2040 2060 2080 2100 FIGURE 1.3 The Earth-fixed coordinates of the sites defining the terrestrial reference frame change on a wide range of time scales when mass is redistributed over the surface of the Earth.
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and their primary contributions include the following: Each of these four measurement techniques makes 1. VLBI, which provides information on the three several contributions to the terrestrial reference frame Earth orientation angles and scale.
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Systematic errors in VLBI optical receivers, and accurate timing to measure the data and data products that can affect the stability two-way travel time (and hence distance) to retroreof the terrestrial reference frame include the effects flector arrays on the geodetic satellites.
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sion Laboratory operates 51 of the IGS stations and hosts the IGS Central Bureau. The IGS organizes Geodetic Services the global GNSS network used to compute accurate GNSS orbits and clocks.
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2005. Terrestrial reference frame effects scientific and geodetic needs are presented in Science on global sea level rise determination from TOPEX/Poseidon and Applications Traceability matrixes in Appendix A
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