Vu Nguyen
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View article: Research on the Use Of Satellite Gravity Data for Gravity Gradients Modeling in The Vietnam Region
Research on the Use Of Satellite Gravity Data for Gravity Gradients Modeling in The Vietnam Region Open
Research on gravity gradients holds substantial importance across various scientific and practical domains, particularly in geophysics, geology, resource exploration, and Earth sciences. In addition to traditional gravity measurement techn…
View article: Initial Polarimetric Radio Occultation Results from Spire’s Nanosatellite Constellation: Satellite Payload, Collection, and Calibration
Initial Polarimetric Radio Occultation Results from Spire’s Nanosatellite Constellation: Satellite Payload, Collection, and Calibration Open
Radio occultation of Global Navigation Satellite System (GNSS) signals is a remote sensing technique that provides precise thermodynamic measurements of Earth’s atmosphere, which are routinely assimilated into numerical weather prediction …
View article: Advances in the Use of Global Navigation Satellite System Polarimetric Radio Occultation Measurements for NWP and Weather Applications
Advances in the Use of Global Navigation Satellite System Polarimetric Radio Occultation Measurements for NWP and Weather Applications Open
© 2024 American Meteorological Society. This is an Author Accepted Manuscript distributed under the terms of the default AMS reuse license. For information regarding reuse and general copyright information, consult the AMS Copyright Policy…
View article: Toward Accurate Physics‐Based Specifications of Neutral Density Using GNSS‐Enabled Small Satellites
Toward Accurate Physics‐Based Specifications of Neutral Density Using GNSS‐Enabled Small Satellites Open
Satellite‐atmosphere interactions cause large uncertainties in low‐Earth orbit determination and prediction. Thus, knowledge of and the ability to predict the space environment, most notably thermospheric mass density, are essential for op…
View article: Sea Ice Classification and Altimetry using Grazing Angle Reflected GNSS Signals Measured by Spire’s Nanosatellite Constellation
Sea Ice Classification and Altimetry using Grazing Angle Reflected GNSS Signals Measured by Spire’s Nanosatellite Constellation Open
<p>Global Navigation Satellite Systems-Reflectometry (GNSS-R) offers novel observations over the cryosphere with the use of reflected navigation signals (eg. GPS or Galileo) as signals of opportunity. This technique has the potential…
View article: Sensing the ionosphere with the Spire radio occultation constellation
Sensing the ionosphere with the Spire radio occultation constellation Open
Radio occultation (RO) provides a cost-effective component of the overall sensor mix required to characterise the ionosphere over wide areas and in areas where it is not possible to deploy ground sensors. The paper describes the RO constel…
View article: Monitoring Perturbations in the Lower-Ionosphere Using GNSS Radio Occultation Observed from Spire's Cubesat Constellation
Monitoring Perturbations in the Lower-Ionosphere Using GNSS Radio Occultation Observed from Spire's Cubesat Constellation Open
<p>The lower altitude region of the ionosphere (60-150 km) is characterized by a strong coupling between the neutral atmosphere and ionospheric plasma. Due to the high ion-neutral collision rate the plasma at these altitudes is less …
View article: Cryospheric Applications of Novel GNSS Grazing Angle Reflections Collected by Spire CubeSats
Cryospheric Applications of Novel GNSS Grazing Angle Reflections Collected by Spire CubeSats Open
<p>Spire Global operates the world&#8217;s largest and rapidly growing constellation of CubeSats performing GNSS based science and Earth observation. Currently, the Spire constellation, with many satellites in polar orbits, perfo…
View article: First Observations of Short‐Period Eastward Propagating Planetary Waves From the Stratosphere to the Lower Thermosphere (110 km) in Winter Antarctica
First Observations of Short‐Period Eastward Propagating Planetary Waves From the Stratosphere to the Lower Thermosphere (110 km) in Winter Antarctica Open
Unique Fe lidar observations in May 2014 at McMurdo, combined with Aura‐Microwave Limb Sounder measurements, lead to a new discovery that the amplitudes of 4 day and 2.5 day planetary waves (PWs) grow rapidly from 1–2 K at 100 km to over 1…
View article: Global observations of 2 day wave coupling to the diurnal tide in a high‐altitude forecast‐assimilation system
Global observations of 2 day wave coupling to the diurnal tide in a high‐altitude forecast‐assimilation system Open
We examine wave components in a high‐altitude forecast‐assimilation system that arise from nonlinear interaction between the diurnal tide and the westward traveling quasi 2 day wave. The process yields a westward traveling “sum” wave with …
View article: Generation of secondary waves arising from nonlinear interaction between the quasi 2 day wave and the migrating diurnal tide
Generation of secondary waves arising from nonlinear interaction between the quasi 2 day wave and the migrating diurnal tide Open
Theory and past observations have provided evidence that atmospheric tides and other global‐scale waves interact nonlinearly to produce additional secondary waves throughout the space‐atmosphere interaction region. However, few studies hav…
View article: Global-Scale, Nonlinearly-Generated Waves in the Space-Atmosphere Interaction Region
Global-Scale, Nonlinearly-Generated Waves in the Space-Atmosphere Interaction Region Open
Understanding of the space-atmosphere interaction region spanning from 60 km to 500 km altitude is becoming increasingly important for satellite operations. Significant variability in this region is induced by global-scale atmospheric tide…