Item

Abstract

The free services of the Global Navigation Satellite Systems (GNSS) can provide positioning and navigation in Single Point Positioning (SPP) mode. Therefore, this mode is widely used in vehicle, marine, and UAV navigation, as well as in various geophysical applications. However, the accuracy of the single-frequency SPP mode is limited by the quality of broadcast satellite orbit and clock corrections and ionospheric correction algorithms (ICAs). In recent years, International GNSS Service (IGS) analysis centers started to provide accurate geodetic real-time products using the Networked Transport of RTCM (Radio Technical Commission for Maritime Services) via Internet Protocol (NTRIP). The corrections are provided in the State Space Representation (SSR) format. Although the IGS SSR standard is designed primarily to support real-time Precise Point Positioning (PPP) mode, in this presentation we investigate their applicability to improve the current performance of SPP-based navigation. For this purpose, we selected 30 globally distributed GNSS-tracking stations. Firstly, the standard SPP mode - using the broadcast navigation data - was processed, presenting the current performance of multi-GNSS code-based navigation. Secondly, the SPP was supported by SSR orbit and clock corrections, and real-time ionospheric products. The results show that multi-GNSS code-based navigation can be significantly improved by using SSR corrections. The resulting position accuracy is comparable to that obtained with final, precise geodetic products.