Observation of the Earth System from Space

1. Front Matter

   Pages I-X

   PDF

2. CHAMP CHAllenging Minisatellite Payload

   1. Front Matter

      Pages 1-1

      PDF

   2. CHAMP Mission 5 Years in Orbit

      • Christoph Reigber, Hermann Lühr, Ludwig Grunwaldt, Christoph Förste, Rolf König, Heiner Massmann et al.

      Pages 3-15

   3. Remarks on CHAMP Orbit Products

      • Rolf König, Grzegorz Michalak, Karl Hans Neumayer, Shengyuan Zhu

      Pages 17-26

   4. Harmonic Analysis of the Earth’s Gravitational Field from Kinematic CHAMP Orbits based on Numerically Derived Satellite Accelerations

      • Tilo Reubelt, Martin Götzelmann, Erik W. Grafarend

      Pages 27-42

   5. Earthquake Signatures in the Ionosphere Deduced from Ground and Space Based GPS Measurements

      • Norbert Jakowski, Volker Wilken, Konstantin Tsybulya, Stefan Heise

      Pages 43-53

   6. Global Atmospheric Sounding with GPS Radio Occultation aboard CHAMP

      • Jens Wickert, Torsten Schmidt, Georg Beyerle, Stefan Heise, Christoph Reigber

      Pages 55-67

3. GRACE The Gravity Recovery and Climate Experiment

   1. Front Matter

      Pages 69-69

      PDF

   2. Design and Operation of the GRACE ISDC

      • Bernd Ritschel, Andrea Bendig, Hartmut Palm, Ronny Kopischke, Sebastian Freiberg, Frank Flechtner et al.

      Pages 71-82

   3. De-aliasing of Short-term Atmospheric and Oceanic Mass Variations for GRACE

      • Frank Flechtner, Roland Schmidt, Ulrich Meyer

      Pages 83-97

   4. Integrated Sensor Analysis GRACE

      • Björn Frommknecht, Ulrich Fackler, Jakob Flury

      Pages 99-113

   5. Static and Time-Variable Gravity from GRACE Mission Data

      • Roland Schmidt, Frank Flechtner, Ulrich Meyer, Christoph Reigber, Franz Barthelmes, Christoph Förste et al.

      Pages 115-129

   6. Gravity Field Recovery from GRACE-SST Data of Short Arcs

      • Torsten Mayer-Gürr, Annette Eicker, Karl Heinz Ilk

      Pages 131-148

   7. Mapping Earth’s Gravitation Using GRACE Data

      • Pavel Novák, Gerrit Austen, Mohammad A. Sharifi, Erik W. Grafarend

      Pages 149-164

   8. High Frequency Temporal Earth Gravity Variations Detected by GRACE Satellites

      • Xiaogong Hu, Chuang Shi, Frank Flechtner, Rolf König, Peter Schwintzer, Roland Schmidt et al.

      Pages 165-174

4. GOCE The Gravity Field and Steady-State Ocean Circulation Explorer

   1. Front Matter

      Pages 175-175

      PDF

   2. From Kinematic Orbit Determination to Derivation of Satellite Velocity and Gravity Field

      • Dražen Švehla, Lóránt Földváry

      Pages 177-192

   3. Mission Simulation and Semi-analytical Gravity Field Analysis for GOCE SGG and SST

      • Martin Wermuth, Reiner Rummel, Lóránt Földváry

      Pages 193-208

   4. GOCE Gravity Field Modeling: Computational Aspects — Free Kite Numbering Scheme

      • Christian Boxhammer, Wolf-Dieter Schuh

      Pages 209-224

   5. An Integrated Global/Regional Gravity Field Determination Approach based on GOCE Observations

      • Annette Eicker, Torsten Mayer-Gürr, Karl Heinz Ilk

      Pages 225-237

In the recent years, space-based observation methods have led to a subst- tially improved understanding of Earth system. Geodesy and geophysics are contributing to this development by measuring the temporal and spatial va- ations of the Earth’s shape, gravity ?eld, and magnetic ?eld, as well as at- sphere density. In the frame of the GermanR&D programmeGEOTECHNO- LOGIEN,researchprojectshavebeen launchedin2002relatedto the satellite missions CHAMP, GRACE and ESA’s planned mission GOCE, to comp- mentary terrestrial and airborne sensor systems and to consistent and stable high-precision global reference systems for satellite and other techniques. In the initial 3-year phase of the research programme (2002-2004), new gravity ?eld models have been computed from CHAMP and GRACE data which outperform previous models in accuracy by up to two orders of m- nitude for the long and medium wavelengths. A special highlight is the - termination of seasonal gravity variations caused by changes in continental water masses. For GOCE, to be launched in 2006, new gravity ?eld analysis methods are under development and integrated into the ESA processing s- tem. 200,000 GPS radio occultation pro?les, observed by CHAMP, have been processed on an operational basis. They represent new and excellent inf- mation on atmospheric refractivity, temperature and water vapor. These new developments require geodetic space techniques (such as VLBI, SLR, LLR, GPS) to be combined and synchronized as if being one global instrument.

• Earth System
• Earth rotation
• Gravimetry
• Gravity field analysis
• Physical geodesy
• Satelite geodesy
• Space geodesy
• experiment
• geodesy
• satellite
• sensor
• remote sensing/photogrammetry

• Institut für Astonomische Physikalische Geodäsie, TU München, München, Germany

  J. Flury, R. Rummel

• Dept. 1, Geodäsie und Fernerkundung Telegrafenberg, GeoForschungsZentrum Potsdam, Potsdam, Germany

  C. Reigber, M. Rothacher

• Bayerische Kommission für die Internationale Erdmessung, Bayerische Akademie der Wissenschaften, München, Germany

  G. Boedecker

• Forschungseinrichtung Satellitengeodäsie Fundamentalstation Wettzell, TU München, Kötzting, Germany

  U. Schreiber

Policies and ethics