Joint Retrieval of PBL temperature and water vapor structure from GNSS-RO and microwave sounder measurements
No abstract provided
Moore, A. W.↗
Engineering topics
Hajj, G. A.
Publications and source records attributed to Hajj, G. A..
Assessment of Open-Loop Tracking Occultation Data from COSMIC
An assessment of open-loop tracking occultation data from Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) is presented.
COSMIC↗
GPS-based remote sensing of the geospace environment: horizontal and vertical structure of the ionosphere and plasmasphere
We will discuss a new data assimilation model of ionosphere, the Global Assimilative Ionosphere Model (GAIM), capable of integrating measurements from GPS and other sensors with a physics-based ionospheric model, to provide detailed global nowcasts of ionospheric structure, useful for science and applications.
Moldwin, Mark↗
Data assimilation of ground GPG total electron content into a physics-based ionosheric model by use of the Kalman filter
A three-dimensional (3-D) Global Assimilative Ionospheric Model (GAIM) is currently being developed by a joint University of Southern California and Jet Propulsion Laboratory (JPL) team. To estimate the electron density on a global grid, GAIM uses a first-principles ionospheric physics model and the Kalman filter as one of its possible estimation techniques.
ionosphere forecast data assimilation Kalman filte↗
A GPS occultation study of polar stratospheric waves: impacts on polar stratospheric cloud formation
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GPS polar stratospher ozone↗
Interferometry of GPS signal occultations from low Earth orbiters
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GPS remote sensing troposphere altimetry↗
Effects of ducting on GPS occultations
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GPS occultation ducting refractivity bias PBL↗
Forecasting equatorial spread-F using a global assimilative ionospheric model
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GAIM ionospheric measurements↗
Lower-troposphere sounding with GPS occultation: challenges and progress
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GPS occultation ducting refractivity bias open loo↗
Forecasting equatorial spread-F using a global assimilative ionospheric model
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ionospheric modeling data assimilation↗
Lower troposphere sounding with GPS occultation: challenges and progress
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GPS occultation ducting refractivity bias open loo↗
A case study of the 2001/2002 winter polar arctic stratosphere as inferred from GPS radio occultations
GPS radio occultations captured by receivers on board the CHAMP and SAC-C spacecraft were used to study the evolution of temperature profiles in the Arctic region north of 65 degrees.
GPS occultations polar stratosphere climate↗
A database of atmospheric refractivities from GPS radio occultations
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GPS occultations refractivity↗
A study of the refractivity bias in occultation retrievals using end-to-end simulations
Direct Methanol Fuel Cells in portable applications are expected to provide substantially higher energy density and longer operating times over advanced batteries. The time threshold of advantage of using a fuel cell instead of a battery is almost independent of the power level, and is determined by the power density of the fuel cell and its operating efficiency.
GPS↗
Study of global ionospheric Total Electron Content (TEC) and plasmaspheric density changes due to interplanetary pressure and magnetic field changes
In this paper we describe our plans to better understand this phenomenon using TEC measurements from ground and space-borne GPS receivers.
ionosphere plasmasphere interplanetary pressure ma↗
A fast implementation of the backpropagation and canonical transform methods for GPS occultations
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GPS backpropagation canonical transform fast metho↗