VTEC at Low Latitude Station Using Galileo Pseudorange

Abstract:

The Global Navigation Satellite Systems GNSS retrieve data from multi-frequency and four constellations: GPS, GLONASS, GALILEO, BEIDOU. Global ionospheric models have not enough spatial resolution for regional purposes. Ecuador is located in the highest ionospheric activity zone (low latitude region). This paper aims to determinate the Vertical Total Electron Content, VTEC, from GALILEO signals to understand the ionospheric behavior above a low latitude station. We used data from EPEC (SIRGAS-CON) monitoring station from January 27th to November 4th, 2019 (281 days). VTEC measurements were obtained from GALILEO signals E1 and E5a and GPS signals L1 and L2. Time series used hourly data. Results showed VTEC for GALILEO varied between 22,19 and 37,47 TECU and VTEC for GPS varied between 35,55 and 50,15 TECU. Maximum VTEC measurements reached in April 10th (day 100) both to GALILEO and GPS. Time series denoted a similar behavior however there was an 11,69 mean TECU offset, 1,45 TECU standard deviation.

Año de publicación:

2020

Keywords:

• GALILEO
• Pseudorange
• Low latitudes
• VTEC

Fuente:

scopus