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Techniques for Graceful Reversion from Dual to Single Frequency WAAS
Techniques Graceful Reversion Single Frequency WAAS
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2015/6/26
This paper investigates techniques to sustain dual frequency ionosphere performance when a dual-frequency airborne user loses all but one GPS frequency while descending into the radio frequency interf...
Ionospheric Scintillation Effects on Single and Dual Frequency GPS Positioning
Ionospheric Scintillation Effects Dual Frequency GPS Positioning
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2015/6/26
The low latitude ionosphere poses a challenge to both GPS users and Satellite-Based Augmentation System(SBAS) providers. Single and dual frequency GPS receivers used in low-latitude regions can suffer...
Optimizing WAAS Accuracy/Stability For a Single Frequency Receiver
Optimizing WAAS Accuracy/Stability Single Frequency Receiver
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2015/6/26
The Wide Area Augmentation System (WAAS) provides accuracy (95%) to better than 1m in horizontal and 2m in vertical, which is quite an improvement compared to the stand-alone GPS accuracy and well wit...
A Reference Point-based Precise Relative Positioning Method Using a Single Frequency Receiver
Point-based Precise Relative Positioning Method Single Frequency Receiver
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2015/6/26
This paper investigates how to take advantage of the known position of a point at which a single frequency GPS receiver is located. Using this reference point and a single frequency receiver, a precis...
Single Antenna GPS Spoof Detection that is Simple,Static, Instantaneous and Backwards Compatible for Aerial Applications
Single Antenna GPS Spoof Detection Simple Static Instantaneous Backwards Compatible Aerial Applications
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2015/6/24
Despite the antenna’s privileged position as the first line of defense against interferers, jammers and spoofers, most detection and mitigation techniques are realized in the receiver’s backend ...
Optimizing the e-beam profile of a single carbon nanotube field emission device for electric propulsion systems
Electric propulsion Carbon nanotube Finite element analysis
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2010/10/25
Preliminary studies on field emission (FE) arrays comprised of carbon nanotubes (CNT) as an electron source for electric propulsion system show remarkably promising results. Design parameters for a ca...
GPS Carrier-Phase Time Transfer Using Single-Difference Integer Ambiguity Resolution
GPS Carrier-Phase Time Transfer Single-Difference Integer Ambiguity Resolution
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2009/9/3
GPS is widely used for time and frequency transfer. To estimate the clock difference between two ground stations, a single baseline solution can be performed using external products for the modelling ...