On the Use and Performance of New Galileo Signals for Ionospheric Scintillation Monitoring over Antarctica

Romero, Rodrigo; Linty, Nicola; Cristodaro, Calogero; Dovis, Fabio; Alfonsi, Lucilla

doi:10.33012/2017.14942

Cited by 8 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analog results, for different signals, bandwidths and constellations can be obtained exploiting the same architecture, by changing the grabber and receiver configurations. In [24] and [25], the scintillation activities have been monitored by processing GPS L1, L2C, L5 and Galileo E1bc, E5a signals.…”

Section: Resultsmentioning

confidence: 99%

Design of a Configurable Monitoring Station for Scintillations by Means of a GNSS Software Radio Receiver

Cristodaro

Dovis

Linty

et al. 2018

IEEE Geosci. Remote Sensing Lett.

Self Cite

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Design of a Configurable Monitoring Station for Scintillations by Means of a GNSS Software Radio Receiver

Cristodaro

Dovis

Linty

et al. 2018

IEEE Geosci. Remote Sensing Lett.

Self Cite

View full text Add to dashboard Cite

“…The availability of more satellites from more constellations enables, in principle, denser monitoring of ionosphere. In addition, since one of the features of Galileo is to provide better coverage at high latitudes, the usage of these signals could allow improved monitoring, especially in polar regions (Romero et al 2017). Figure 14 shows the detection of phase scintillation from Galileo E1 satellites 11 and 19, as detected by the Septentrio ISMR and the SDR-based system at SANAE, on January 20, 2016.…”

Section: Multi-constellation Monitoringmentioning

confidence: 99%

“…The new civilian signals, such as GPS L2C, GPS L5, Galileo E1bc or Galileo E5a, can be successfully used for scintillation monitoring. Romero et al (2017) showed how ionospheric measurements from Galileo signals could be used and integrated with GPS.…”

Section: Multi-frequency Monitoringmentioning

confidence: 99%

Software-defined radio technology for GNSS scintillation analysis: bring Antarctica to the lab

2018

Self Cite

View full text Add to dashboard Cite

Global navigation satellite systems (GNSSs) are widely used to support logistics, scientific operations, and to monitor the polar ionosphere indirectly, which is a region characterized by strong phase scintillation events that severely affect the quality and reliability of received signals. Professional commercial GNSS receivers are widely used for scintillation monitoring; on the contrary, custom-designed solutions based on data grabbers and software receivers constitute novelty. The latter enables a higher level of flexibility and configurability, which is important when working in remote and severe environments. We describe the scientific, technological, and logistical challenges of installing an ionospheric monitoring station in Antarctica, based on a multi-constellation and multi-frequency GNSS data grabber and a software-defined radio receiver. Having access to the full receiver chain and to intermediate signal processing stages allows a deep analysis of the impact of scintillation and, in turn, a better understanding of the physical phenomenon. The possibility to process high-resolution raw intermediate frequency samples of the signal enables not only the computation of scintillation indexes with the same quality as professional devices but also the design and test of innovative receiver architectures and algorithms. Furthermore, the record and replay approach offers the possibility to process in the lab the signals captured on site, with high fidelity level. It is like being in Antarctica again, but with an unlimited set of receivers and higher computational, storage, and bandwidth resources. The main advantages and disadvantages of this approach are analyzed. Examples of monitoring results are reported, confirming the monitoring capabilities, showing the good agreement with commercial receiver outputs and confirming the validity of post-processing and replay operations.

show abstract

“…The amount of free electrons the signals encounter is quantified by the Total Electron Content (TEC), defined as the total number of free electrons in an imaginary cylinder with a cross-section area of one square metre around the signal path. It is measured in TEC Units (TECU), which is 10 16 electron per square metre.…”

Section: Introductionmentioning

confidence: 99%

Experimental Determination of the Ionospheric Effects and Cycle Slip Phenomena for Galileo and GPS in the Arctic

Beeck,

Mitchell,

Jensen

et al. 2023

Remote Sensing

View full text Add to dashboard Cite

The ionosphere can impair the accuracy, availability and reliability of satellite-based positioning, navigation and timing. The Arctic region is particularly affected by strong ionospheric gradients and phase scintillation, posing a safety issue for critical infrastructure and operations. Ionospheric warning and impact maps can provide support to Arctic operations, but to produce such maps threshold values have to be determined. This study investigates how such thresholds can be derived from the GPS and Galileo satellite signals. Rapid changes in total electron content (TEC) or scintillation-induced receiver tracking errors could result in cycle slips or even loss of lock. Cycle slips and data outages are used as a measure of impact on the receiver in this paper. For Galileo, 73.6% of the impacts were cycle slips and 26.4% were outages, while for GPS, 29.3% of the impacts were cycle slips and 70.7% were outages. Considering the sum of cycle slips and outages, it is worth noting that the sum of impacts for Galileo signals is larger than for GPS. A range of possible explanations have been examined through hardware-in-the-loop simulations. The simulations showed that the GPS L2 signal was not adequately tracked during rapid TEC changes and TEC changes were underestimated, thus the GPS cycle slips, derived from L1 and L2 derived TEC changes, were not all registered. These results are important in designing threshold values for TEC and for scintillation impact maps as well as for the operation of GNSS equipment in the Arctic. In particular, the results show that ionospheric changes could be underestimated if GPS L1 and L2 were used in isolation from other dual frequency combinations. It is the first time this analysis has been made for Greenland and the first time that the dual frequency derivation of ionospheric delay using GPS L1 and L2 has been shown to underestimate large TEC gradients. This has important implications for informing GNSS operations that rely on GPS to provide reliable estimates of the ionosphere.

show abstract

On the Use and Performance of New Galileo Signals for Ionospheric Scintillation Monitoring over Antarctica

Cited by 8 publications

References 0 publications

Design of a Configurable Monitoring Station for Scintillations by Means of a GNSS Software Radio Receiver

Design of a Configurable Monitoring Station for Scintillations by Means of a GNSS Software Radio Receiver

Software-defined radio technology for GNSS scintillation analysis: bring Antarctica to the lab

Experimental Determination of the Ionospheric Effects and Cycle Slip Phenomena for Galileo and GPS in the Arctic

Contact Info

Product

Resources

About