This paper describes GNSS-processing optimisation for better autonomous single-point positioning using single frequency code receivers. GNSS processing improvement is carried out in terms of near-real time ionosphere delay modelling, which will be crucial during the upcoming 24th maximum solar cycle. The main scope of this article is to examine how sudden changes in the ionosphere, caused by events on the Sun, affect autonomous single-point positioning in simple navigation tasks. Further, the specific method of ionosphere delay modelling from actual two-frequency receivers, acquiring carrier phase and code observations, is shown. This study was conducted for preparations for the upcoming solar cycle maximum, expected to be held in May 2013.
COBISS.SI-ID: 6217825
This paper presents the monitoring of ionospheric disturbances over the territory of Slovenia, which are primarily the result of increased solar activity at the approach of 24th solar cycle. The data used resides from the network of permanent GNSS network SIGNAL. It discusses the effects of ionospheric disturbances on GNSS positioning and methods of monitoring them using solely GNSS observations and the accompanying infrastructure. As an indicator of ionospheric disturbance the ionospheric index I95 is used, which is based on modeling the correction of position, established by GNSS. The purpose of the analysis was to assess the degree of risk of location-based services in Slovenia during the periods of increased solar activity.
COBISS.SI-ID: 36596741
This paper describes the emerging concept of solar irreguarities' warning system by introducing its observation inputs, modelling and outputs matched to GNSS service classes. It is the result of research project J2-3625 with a goal to pin-point those massively used location based services for positioning which might be degraded due to increased solar activities, and, to explain how strong this impact may be.
COBISS.SI-ID: 9413716