Troposphere delay correction method suitable for land-based navigation system

The invention provides a troposphere delay correction method suitable for a land-based navigation system, and the method comprises the steps: obtaining atmospheric parameters, such as temperature, water vapor pressure and atmospheric pressure, through a meteorological sensor of a base station, and transmitting the information, such as the atmospheric parameters, position and elevation, to an airborne terminal; the airborne terminal calculates the height of the airborne terminal by using the air pressure data of the airborne barometer; the airborne terminal and the base station adopt a data chain bidirectional back-and-forth timing method to calculate the slope distance; and the airborne terminal performs troposphere delay calculation by using the atmospheric parameters of the base station, the elevation of the base station, the elevation of the airborne terminal and the bidirectional distance measurement value, then corrects the distance measurement value, and calculates a distance measurement value without t