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Article
Digitized global land-sea map and access software
A computer-efficient global data file, which contains digitized information that enables identification of a given latitude/longitude defined point as over land or over water, was generated from a data base wh...
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Chapter and Conference Paper
Chapter 6 data analysis
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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...
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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...
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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 ...
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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...
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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...
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Article
Robust estimation of systematic errors of satellite laser range
Methods for analyzing laser-ranging residuals to estimate station-dependent systematic errors and to eliminate outliers in satellite laser ranges are discussed. A robust estimator based on an M-estimation pri...
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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...
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Article
Seasonal sea level change from TOPEX/Poseidon observation and thermal contribution
Seasonal steric sea-level change due to temperature variation in the mixing layer is assessed using space-measured sea-surface temperature data and historical in situ temperature measurements. The results are...
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Article
Analytic perturbation solutions to the Venusian orbiter due to the nonspherical gravitational potential
The analytic perturbation solutions to the motions of a planetary orbiter given in this paper are effective for 0e1, where e is the orbital eccentricity of the orbiter. In the solution, it is assumed that the rot...
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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...
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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...
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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...
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Chapter
CHAMP Gravity Anomalies over Antarctica
Before CHAMP, the Antarctic gravity field was constrained predominantly by satellite altimetry-derived gravity measurements over the oceans and the variations in satellite orbits at altitudes of about 700 km a...
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Article
GPS radio occultation: A potential new data source for improvement of antarctic pressure field
Radio occultation technique, first demonstrated by the GPS/MET experiment in 1995[1], has the potential to provide improved spatial and temporal resolution in the probing of the Earth’s neutral atmosphere, includ...
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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...
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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...
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Chapter
Regional Geoid Undulations from CHAMP, Represented by Locally Supported Basis Functions
Regional geoid undulations are determined from CHAMP data using various locally supported basis functions to assess their respective efficiency, accuracy and multi-resolution representation properties. These f...
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Chapter
Potential Contribution of CHAMP Occultation to Pressure Field Improvement for Gravity Recovery
This paper studies one aspect of use of the CHAMP GPS occultation data, namely the improvement of the atmospheric pressure field, particularly over Antarctica. Previous studies indicate that pressure differenc...
