16 Result(s)

Chapter and Conference Paper

Baltic Sea Mass Variations from GRACE: Comparison with In Situ and Modelled Sea Level Heights

The monthly variation in the water mass of the semi-enclosed Baltic Sea is about 60 Gt RMS over an area of \(390,000 \textrm{km}^2\) ...

J. Virtanen, J. Mäkinen, M. Bilker-Koivula… in Gravity, Geoid and Earth Observation (2010)

Chapter and Conference Paper

Continental Water Storage Changes from GRACE Line-of-Sight Range Acceleration Measurements

Spaceborne gravimetry such as GRACE provides a unique opportunity to observe basin-scale surface and subsurface global water storage changes with unprecedented accuracy and temporal and spatial coverages. The ...

Y. Chen, B. Schaffrin, C.K. Shum in VI Hotine-Marussi Symposium on Theoretical… (2008)

Chapter and Conference Paper

Multiresolution representation of a regional geoid from satellite and terrestrial gravity data

In this paper we present results from modeling the Earth’s gravitational field over the northern part of South-America using spherical wavelets. We have applied our analysis to potential data that we derived f...

M. Schmidt, J. Kusche, J.P. van Loon, C.K. Shum… in Gravity, Geoid and Space Missions (2005)

Chapter and Conference Paper

Towards the Estimation of a Multi-Resolution Representation of the Gravity Field Based on Spherical Wavelets

Usually the gravity field of the Earth is modeled by means of a series expansion in terms of spherical harmonics. However, the computation of the series coefficients requires preferably homogeneous distributed...

M. Schmidt, O. Fabert, C.K. Shum in A Window on the Future of Geodesy (2005)

Chapter and Conference Paper

Extreme Southern Ocean Tide Modeling

Predictability of barotropic ocean tides is significantly less accurate in the coastal regions, littoral and shallow seas, and oceans not covered by TOPEX/POSEIDON (T/P) than in deep oceans (>1000 m depth) wit...

Yuchan Yi, C. K. Shum, Ole Andersen… in Satellite Altimetry for Geodesy, Geophysic… (2004)

Chapter and Conference Paper

Calibration Results of GFO

GFO has been operational since November 2000 and it’s data products are available to the scientific community. This paper provides a summary of the GFO calibration and sensor validation results, and presents r...

Changyin Zhao, C. K. Shum, Yuchan Yi in Satellite Altimetry for Geodesy, Geophysic… (2004)

Chapter and Conference Paper

Determination of Mass Balance of Polar Ice from Gravity

We use satellite solutions to the low degree zonal coefficients of the Earth’s gravitational potential, J ₂ through J ₇, to reveal large scale f...

Andrew S. Trupin, C. K. Shum in Gravity, Geoid and Geodynamics 2000 (2002)

Chapter and Conference Paper

Aliasing and Polar Gap Effects on Geopotential Coefficient Estimation: Space-wise Simulation Study of GOCE and GRACE

The effects of aliasing and polar data gap have been investigated analytically and numerically for the upcoming dedicated gravity satellite missions. It is verified that they could cause more significant syste...

S.-C. Han, C. Jekeli, C. K. Shum in Vistas for Geodesy in the New Millennium (2002)

Chapter and Conference Paper

GPS/LEO Rapid Orbit Determination in Support of GPS Meteorology: Status and Future Plans

GPS meteorology has a potential of seamless sounding of refractivity from LEO (low earth orbit) orbit altitude to near Earth surface, and vertically above the land-based receivers. In GPS occultation technique...

Dorota A. Grejner-Brzezinska, Shengjie Ge… in Vistas for Geodesy in the New Millennium (2002)

Chapter and Conference Paper

Geodetic Applications of the ROCSAT-3/COSMIC Mission

The jointly planned Taiwan-US space mission ROCSAT-3/COSMIC (Constellation Observing System for Meteorology, Ionosphere and Climate) is scheduled for launch in 2001. A 6–8 low Earth orbiting satellite constell...

Erricos C. Pavlis, B. F. Chao, C. W. Hwang… in Towards an Integrated Global Geodetic Obse… (2000)

Chapter and Conference Paper

The TEG-3 Geopotential Model

A new solution for the static geopotential, TEG-3, complete to 70×70 in spherical harmonics, has been obtained. The solution represents one of the latest efforts to improve the Earth’s gravity model. The solut...

B. D. Tapley, C. K. Shum, J. C. Ries, S. R. Poole… in Gravity, Geoid and Marine Geodesy (1997)

Chapter and Conference Paper

The Use of GPS Data for Global Gravity Field Determination

GPS tracking data collected by a low-Earth orbiting (LEO) satellite provides global and continuous coverage of the orbit. Consequently, this data set contains valuable information for both precise orbit determ...

Byron D. Tapley, Hyung-** Rim, John C. Ries… in Global Gravity Field and Its Temporal Vari… (1996)

Chapter and Conference Paper

Observed Temporal Variations in the Earth’s Gravity Field from 16-year Starlette Orbit Analysis

Satellite laser ranging data to Starlette, collected during the period from 1975 to 1990, have been analyzed to determine yearly values of the second degree annual (S _{a ...}

M. K. Cheng, R. J. Eanes, C. K. Shum… in From Mars to Greenland: Charting Gravity W… (1992)

Chapter and Conference Paper

A General Ocean Circulation Model Determined in a Simultaneous Solution with the Earth’s Gravity Field

Over the past several years, determination of the sea surface topography using satellite altimetry has been greatly improved due to the implementation of a technique which simultaneously solves for the sea sur...

R. Steven Nerem, Byron D. Tapley, C. K. Shum in Sea Surface Topography and the Geoid (1990)

Chapter and Conference Paper

An Improved Model for the Earth’s Gravity Field

Precision orbit determination methods, along with a new technique to compute relative data weights, have been applied to the determination of the Earth’s gravity field and other geophysical parameters from the...

C. K. Shum, B. D. Tapley, D. N. Yuan, J. C. Ries… in Gravity, Gradiometry and Gravimetry (1990)

Chapter and Conference Paper

Chapter 6 data analysis

Francois Barlier, Ron Beard, Alberto Cenci… in The Interdisciplinary Role of Space Geodesy (1989)