FSUE “VNIIFTRI”, Mendeleevo, Moscow region, Russia
Al’manac of Modern Metrology № 4 (28) 2021, pages 40–48
Annotation. The delay of the navigation signals of the Global Navigation Satellite System (GNSS) in the ionospheric layer of the Earth leads to a significant uncertainty in the results of coordinate-time determinations. For a number of tasks in the field of metrological support of GNSS (for example, calibration of user navigation equipment (UNE) by GLONASS signals at L1, L2 frequencies), the key condition is the assessment and compensation of the ionospheric delay with high accuracy. The article deals with the problem of estimating the signal delay in the Earth’s ionospheric layer. The features of various methods of accounting for or excluding the ionospheric delay from the results of pseudo-range measurements are highlighted and described.
Key words: navigation signals, calibration, GNSS receivers.
Full texts of articles are available only in Russian in printed issues of the magazine.