Preliminary testing of a method for local correction of monthly average ionospheric model for current situation: basing on data from single-frequency GNSS receivers

Differential correction of ionospheric delay of GNSS signals in single-frequency measurements

“…The ionospheric parameter governing the ionospheric correction to a pseudorange is the total electron content (TEC) calculated along a signal path in the ionosphere from vertical TEC at the ionospheric pierce point of the path. Naturally, variations in the F-layer parameters have the greatest effect on vertical TEC, and, as shown some works (see, e.g., [4,5]), of primary importance among them is the critical frequency. Thus, to clarify vertical TEC in the current situation we should first of all set the critical frequency, found from measurements at a given (or close to it) time, in the model.…”

“…We have taken the configuration of the ionospheric pierce points of NS signal paths used to receive GPS signals by a single-frequency receiver with known coordinates of its location in Irkutsk on November 19, 2011 at 11 LT [5]. Irkutsk has been chosen as a reference point; of the set of ionospheric pierce points we have taken 3 remote points: G28, G17, and G11.…”