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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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20 Years of Precision Orbit Determination for Altimetry with GPS
No abstract available
Accuracy and Stability of a Terrestrial Reference Frame Realized from GPS Data
No abstract available
Global Distribution of Ionospheric Scintillation and Irregularities Measured Using GPS Receivers Onboard the FORMOSAT-3/COSMIC Satellites
No abstract available
Backpropagation processing of GPS radio occultation data
In this paper we provide an evaluation of the backpropagation method on simulated occultations as well as data collected by CHAMP and SAC-C.
Cosmic GPS ionospheric sensing and space weather
As our civilization becomes more dependent on space based technologies, we become more vulnerable to conditions in space weather. Accurate space weather specification and forecasting require proper modeling which account for the coupling between the sun, the magnetosphere, the thermosphere, the ionosphere and the mesosphere.
Impact of Eccentricity on East-West Stationkeeping for the GPS Class of Orbits
The investigation will reveal that the influence of luni-solar perturbations contributes to the growth of eccentricity, thus increasing the probability of encountering chaotic motion during a typical satgellite lifetime.