Publikasjoner og ansvarsområder
Advanced RFI Detection, Alerting, and Analysis System (ARFIDAAS)
Combining Visual, Pedestrian, and Collaborative Navigation Techniques for Team Based Infrastructure Free Indoor Navigation
Johan Sverdrup Navigation Technology Final Report
This document reviews the characteristics of navigation system technology in the context of the Johan Sverdrup facility, the available navigation infrastructure and the desired operations therein. After discussing the benefits and drawbacks of the foreseeable sources of navigation data, the feasibil...
RFI Monitoring Activities in Norway (SINTEF)
RFI Monitoring in Support of Safety-Critical Multi-Band GNSS-based Systems
This paper discusses design details and field test verification results of a low-cost Radio Frequency Interference (RFI) event logger developed for monitoring the Global Navigation Satellite System (GNSS) L1 and L5 frequency bands for anomalous emissions that might disrupt or degrade Ground Based Au...
Design of a Multiband Global Navigation Satellite System Radio Frequency Interference Monitoring Front-End with Synchronized Secondary Sensors
This paper investigates the challenges of developing a multi-frequency radio frequency interference (RFI) monitoring and characterization system that is optimized for ease of deployment and operation as well as low per unit cost. To achieve this, we explore the design and development of a multiband ...
Do modern multi-frequency civil receivers eliminate the ionospheric effect?
It is common knowledge in the GNSS community that the ionosphere is dispersive in the L-band, meaning the refractive effects on the carrier phases are proportional to the wavelengths of the carriers, in turn causing differential variation in the measured codes and phases of the various navigation si...
Dual Frequency Positioning via Time Multiplexing of Single Frequency Resources or ‘Mono-Frequency but not Single-Frequency'
A time-multiplexing approach to multi-frequency receiver operation is introduced in this paper, wherein a single-frequency receiver platform is configured to dynamically re-tune to each of a selection of different carrier frequencies to produce multi-frequency measurements. The development of a prot...
On the cleansing and inspection of GPS ephemeris data 2000–2016
Archived GPS ephemeris data for years 2000-2016 is investigated by cleansing and precision measures. The goal of this work was twofold: (1) to reveal and remove incorrect ephemeris data so that the cleansed data is as close to the real broadcasted data as possible, and (2) to analyse the quality of ...