Dynamic Planet: Monitoring and Understanding a Dynamic by Per Knudsen, Ole B. Andersen, René Forsberg, Henning P. Föh,

By Per Knudsen, Ole B. Andersen, René Forsberg, Henning P. Föh, Arne V. Olesen (auth.), Dr. Paul Tregoning, Dr. Chris Rizos (eds.)

Part I Joint IAG/IAPSO Papers.- half II Frontiers within the research of house geodetic measurements.- half III Gravity box decision from a synthesis of terrestrial, satellite tv for pc, airborne and altimetry measurements.- half IV Earth techniques: geodynamics, tides, crustal deformation and temporal gravity changes.- half V Advances within the attention of worldwide and nearby reference frames.- half VI GGOS: worldwide Geodetic looking at System.- half VII platforms and techniques for airborne mapping, geophysics and dangers and catastrophe monitoring.- half VIII Atmospheric experiences utilizing house geodetic techniques.- half IX Geodesy of the planets.

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Extra resources for Dynamic Planet: Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools IAG Symposium Cairns, Australia 22–26 August, 2005

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3 Ocean topography models and mean dynamic Existing mean dynamic topography (MDT) models were collected and reviewed. It was found that the best currently available products were those developed by GOCINA project partners and identified as CLSv2 and OCCAM, along with the MDT based on the assimilation results available from the UK Met Office FOAM system. It was decided to compute a composite MDT model using the available models (see Table 1). computed from satellite altimetry as described above.

Degrees] 0 1 2 3 4 lag (deg) Figure 2. GOCE Level 2 harmonic expansion to degree 200 and to degree 360 simulating the collocation solution Figure 4. Covariance functions of the MDT and the geostrophic surface current components based of the MDT degree variance model shown in Figure 3. Chapter 3 Detecting Ocean Currents from Satellite Altimetry, Satellite Gravity and Ocean Data Zizhan Zhang 1'2 Yang L u 1'3 Houtse HSU 1'3 1 Institute of Geodesy and Geophysics, Chinese Academy of Sciences, 340 Xudong Street, Wuhan, China, 430077 2 Graduate School of the Chinese Academy of Sciences, Beijing, China, 100049 3 Unite Center for Astro-geodynamics Research, CAS, Shanghai, China, 200030 Abstract: With the preparation and launch of the high accuracy geodetic missions CHAMP, GRACE and GOCE, the geoid models have been improved greatly.

C. C. e. K(P,Q) is a homogeneous and isotropic kernel). g. CuN=LN(LN(K(P,Q))) and become as follows (For more information on collocation, see for example Sans6, 1986, Tscherning, 1986) CNN -- Pi (cos~,) (2) 0-; 7, Pi (cos ~) (3) i=2 oo i=2 oO -- Z i-1 or/TTPi(cosp') (4) i=2 where N is the geoid, ), is the normal gravity, and Ag is the gravity anomaly. The determination of the degree variances is essential to obtain reliable and useful signal and error covariance functions. For the gravity field it has been accepted that the degree variances tend to zero somewhat faster than i-3 and that the Tscherning-Rapp model may be used as a reliable model (Tscherning & Rapp, 1974, and Knudsen, 1987).

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