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  1. No Access

    Chapter

    The future geodetic reference frame

    The ingredients for future geodetic reference frames can be separated into at least two categories, namely (1) theoretical, conventional, and definitional aspects, and (2) practical implementation aspects and ...

    T. A. Herring, Z. Altamimi, H.-P. Plag, P. Poli in Global Geodetic Observing System (2009)

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    Chapter

    Recommendations

    In this Chapter, we summarize the recommendations of the GGOS 2020 Writing Team. The recommendations are numbered, with the first number indicating the chapter from which a recommendation originates.

    H.-P. Plag, G. Beutler, R. Gross, T. A. Herring… in Global Geodetic Observing System (2009)

  3. No Access

    Chapter

    Understanding a dynamic planet: Earth science requirements for geodesy

    The complexity of the Earth system has been discussed in many fundamental documents in recent years. Trying to understand the Earth system and improve our forecast capability step by step are the great challen...

    R. Rummel, G. Beutler, V. Dehant, R. Gross, K.H. Ilk… in Global Geodetic Observing System (2009)

  4. No Access

    Chapter

    Earth observation: Serving the needs of an increasingly global society

    In this chapter, we examine the potential of geodesy from the point of view of what society needs in terms of Earth observations to ensure the security of people and resources, and to achieve a sustainable uti...

    D. Sahagian, D. Alsdorf, C. Kreemer, J. Melack… in Global Geodetic Observing System (2009)

  5. No Access

    Chapter

    The goals, achievements, and tools of modern geodesy

    Friedrich Robert Helmert (1843-1917) defined geodesy as the science “of measurements and map**s of the Earth’s surface”. Over time, this definition of geodesy has been extended, mainly as a consequence of te...

    H.-P. Plag, Z. Altamimi, S. Bettadpur, G. Beutler… in Global Geodetic Observing System (2009)

  6. No Access

    Chapter

    Assimilation of GNSS Radio Occultation Data into Numerical Weather Prediction

    Today’s Numerical Weather Prediction (NWP) systems assimilate meteorological observations from a variety of sources. This information is used operationally to update the analysis of global or regional three-di...

    P. Poli in Atmosphere and Climate (2006)

  7. No Access

    Chapter

    Evaluation of Refractivity Profiles from CHAMP and SAC-C GPS Radio Occultation

    Since their launch, CHAMP and SAC-C have collected thousands of GPS radio occultations. In order to evaluate the refractivity derived from these radio occultation measurements by the Jet Propulsion Laboratory ...

    P. Poli, C. O. Ao, J. Joiner… in Occultations for Probing Atmosphere and Cl… (2004)