Method and device for obtaining ionosphere delay and medium

The invention discloses a method and device for obtaining ionosphere delay and a medium, and relates to the technical field of positioning. Comprising the following steps: selecting a target reference station in a preset area and a common-view satellite corresponding to the target reference station; obtaining the actual ionosphere delay of the common-view satellite according to the data observed by the target reference station; fitting ionosphere delay of the common-view satellite is obtained through a polynomial coefficient fitting model; and under the condition that the difference value between the actual ionosphere delay and the fitting ionosphere delay meets a first preset requirement, obtaining the ionosphere delay on each grid point in the preset area according to the fitting ionosphere delay. According to the method provided by the invention, the common-view satellite is a satellite which can be observed by the target reference station in the preset area, and the ionized layer delay of the common-view