This repository contains raw GNSS In-phase and Quadrature (I/Q) data with GPS L1 C/A and Galileo E1 signals. This dataset covers two distinctive scenarios to explore Galileo's Open Service Navigation Message Authentication (OSNMA) feature. A brief description of these scenarios is explained below. Scenario 1: Open Sky This dataset is collected in a clean open sky condition to investigate OSNMA performance in the case of no spoofing scenario. The true receiver is stationary in this scenario. Its position estimated by a geodetic-grade receiver is 60.182°N, 24.828°E with an altitude of 47.248 m. Parameters Value Name OSNMA_cleandata_opensky_460s.dat Duration (s) 740 Available signal (s) L1, E1 Spoofed signal (s) Not present Scenario 2: Spoofing scenario from Jammertest 2023 in Andøya, Norway The dataset represents scenario 17.1.6 of the test campaign in Jammertest 2023, held in Andøya, Norway. The recorded data was then regenerated with a LabSat wideband 3 record and replay device and captured via by a GNSS front-end. This dataset is particularly important to evaluate the effectiveness of OSNMA-based spoofing detection in a real world spoofing scenario. Parameters Value Name OSNMA_jammertest2023_17.1.6_740s.dat Duration (s) 740 Available signal (s) L1, E1 Spoofed signal (s) L1, E1 RF Recording Device: The raw I/Q data samples are captured using the stereo dual-band GNSS front-end developed by Nottingham Scientific Limited (NSL). The configuration of the front-end is presented below. Parameters Frequency Bands (L1/E1) Center frequency (MHz) 1569.03 Sampling rate (MHz) 26 Data type Real Sample bit width 8 bit (I) Bandwidth (MHz) 4.2 FGI-GSRx software-defined receiver can be used to run the above raw I/Q datasets for analyzing the performance of OSNMA in the above two scenarios.

2024