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A Hardware-In-Loop Simulation Test-Bed for NavIC Reflectometry Experiments

A Theoretical Comparison of NavIC and GPS RAIM Performance

GNSS Interference Source Tracking Using Kalman Filters

Modern infrastructure and a myriad of services rely on positioning and timing information provided by Global Navigation Satellite Systems (GNSS) and in particular the Global Positioning System (GPS). However, given their low received signal power …

Particle Filter Based Approach for GNSS Interference Source Tracking: A Feasibility Study

Global Navigation Satellite System (GNSS) signals are vulnerable to intentional or unintentional Radio Frequency Interference (RFI) sources. Since GNSS is used in numerous critical services, it is of interest to accurately localise and track the RFI …

Raw GNSS Data Compression Using Compressive Sensing for Reflectometry Applications

Global Navigation Satellite System (GNSS) reflectometry is a passive and in-expensive technique for remote sensing applications. GNSS reflectometry (GNSS-R) aims at analyzing the multi-path signal reflected from the surface surrounding the receiving …

GNSS-Based Spacecraft Navigation in Elliptical and High Earth Orbits Using Single Propagation Unscented Kalman Filters

With the advent of multiple Global Navigation Satellite Systems (GNSS), the feasibility of navigation using GNSS observations beyond Low Earth Orbits has been explored in recent years. An estimation algorithm is one of the critical components of a …

Challenges in Designing Satellite Constellation for Providing Uninterrupted Network Security through Quantum Key Distribution at a Larger Geographic Region

Quantum Key Distribution (QKD) is an emerging technique for providing network security. There is a growing global interest in this research area because QKD has theoretically proved to be unconditionally secure. QKD in fiber optical channel has its …

Performance Analysis of Fast Unscented Kalman Filters for Attitude Determination

Attitude determination performance analysis of two newly developed Fast Unscented Kalman Filters for CubeSat platforms is presented. The attitude determination scenario of UNSWs EC0 CubeSat developed by the Australian Centre for Space Engineering …

Computationally Efficient Unscented Kalman Filtering Techniques for Launch Vehicle Navigation Using a Space-Borne GPS Receiver

Position and Velocity Estimation of Re-Entry Vehicles Using Fast Unscented Kalman Filters

Accurate position and velocity estimation of a re-entry vehicle is essential for realizing its deviation from the desired descent trajectory and providing necessary guidance command in real-time. Generally the Extended Kalman Filter (EKF) is utilized …