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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,063 records · Page 59

All sources NASA NTRS DOE OSTI

NASA NTRS1996

Ionospheric Imaging with Low-Earth Orbiters Tracking GPS

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occultation measurements Ionospheric Imaging↗

NASA NTRS1995

Estimation of Tropospheric Fluctuations Using GPS Data

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Tropospheric Fluctuations↗

NASA NTRS1995

GPS Observations of Postseismic Deformation Associated With the 1994 Northridge Earthquake

Measurement of postseismic deformation following the 1994 M 6.7 Northridge earthquake indicates continued shortening of the region since the earthquake with motion slowing over a an exponential time scale of 3 years. Afterslip best explains the data, but that is still being tested.

seismology crustal fractures afterslip Northridge↗

NASA NTRS1995

Generation of GPS Observables for Global Ionospheric Mapping

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GBPS Observables↗

NASA NTRS1995

Monitoring Ionospheric Total Electron Content Using the Global GPS Network

Total Electron Content (Ionosphere)↗

NASA NTRS1995

Forecasting Ionospheric Storms Using the GPS Global Network

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Ionospheric Storms↗

NASA NTRS1995

TOPEX/Poseidon Precision Orbit Determination using Combined GPS, SLR and DORIS

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TOPEX/Poseidon↗

NASA NTRS1995

Gipsy-Oasis II: A High Precision GPS Data Processing System and General Satellite Orbit

The GIPSY-OASIS II (GOA II) is an advanced software system used for analysis of tracking data.

Gipsy-Oasis II↗

NASA NTRS1994

The Effects of Anti-Spoofing on Routine Global GPS Analysis

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Anti-Spoofing Gipsy/Oasis↗

NASA NTRS1994

Assessment of GPS Occultations for Atmospheric Profiling

the concept of utilizing the global positioning system signals as a means of sensing the atmosphere has been studied in some detail in the literature.

global positioning system atmospheric profiling↗

NASA NTRS1994

The Organization of the International GPS Service for geodynamics and the Products Available to Users

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geodynamics geodetic and geophysical research↗

NASA NTRS1993

GPS Instrument Development at JPL; Current and Future Receiver Concepts for High Accurasy Measurements

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Global Positioning System↗

NASA NTRS1993

GPS - Acoustic Geodetic Measurements System

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Acoustic System↗

NASA NTRS1993

Global Positions and Velocities from One Year of GPS Data

A generalized no-fiducial approach has been developed to obtain global positions and velocities without fixing any individual position or velocity components. The method used can be applied to any global geodetic technique and proceeds in three general steps. First, daily solutions derived with weak constraints are combined to yield one global set of positions and velocities. Second, 14 minimal constraints are applied to remove uncertainties due to the loosely defined reference frame. Third, transformation from one reference frame to another is accomplished with a 14 parameter transformation. One year of daily FLINN solutions, each made with data from about 40 sites, have been combined to yield our best fit global model...

Heflin, M. B.↗

NASA NTRS1993