A Novel Multi-vision Sensor Dataset for Insect-Inspired Outdoor Autonomous Navigation

Insects have—over millions of years of evolution—perfected many of the systems that roboticists aim to achieve; they can swiftly and robustly navigate through different environments under various conditions while at the same time being highly energy efficient. To reach this level of performance and efficiency, one might want to look at and...

InSAR datum connection using GNSS-augmented radar transponders

Deformation estimates from Interferometric Synthetic<br/>Aperture Radar (InSAR) are relative: they form a ‘free’<br/>network referred to an arbitrary datum, e.g. by assuming a reference<br/>point in the image to be stable. However, some applications<br/>require ‘absolute’ InSAR estimates, i.e. expressed in<br/>a well-defined terrestrial...

An efficient implementation of fixed failure-rate ratio test for GNSS ambiguity resolution

Ambiguity Resolution (AR) plays a vital role in precise GNSS positioning. Correctly-fixed integer ambiguities can significantly improve the positioning solution, while incorrectly-fixed integer ambiguities can bring large positioning errors and, therefore, should be avoided. The ratio test is an extensively used test to validate the fixed...

On User Algorithms for GNSS Precise Point Positioning

Precise Point Positioning (PPP) is a Global Navigation Satellite System (GNSS) processing method with the objective of providing high positioning accuracy without the need for a nearby base station or dense network of reference stations operated by the user. To reach this objective, PPP uses the very precise carrier phase measurements in...

A Reconfigurable GPS/Galileo Receiver Front-end for Space Applications

The trend of space technology developments is moving from high power consuming, bulky and costly systems towards low-power, small, low-cost and flexible systems. Thus, the spacecraft can benefit from multi-purpose and flexible systems which can be low-power and low-cost by employing new technology. One example of such system is a GNSS receiver...

GNSS Carrier Phase-based Attitude Determination: Estimation and Applications

Attitude determination through the use of Global Navigation Satellite System (GNSS) signals is one of the many applications of satellite-based navigation. Multiple GNSS antennas installed on a given platform are used to provide orientation estimates, thus adding attitude information to the standard positioning service. Precise attitude estimates...

ADOP in closed form for a hierarchy of multi-frequency single-baseline GNSS models

Successful carrier phase ambiguity resolution is the key to high-precision positioning with Global Navigation Satellite Systems (GNSS). The ambiguity dilution of precision (ADOP) is a well-known scalar measure which can be used to infer the strength of the GNSS model for carrier phase ambiguity resolution. In this contribution we present...