Weather data assimilation assistance device, weather data assimilation assistance method, and weather data assimilation assistance system

A weather data assimilation assistance method implementable with a weather data assimilation assistance device, the method comprising:

• calculating a wet delay in a satellite line-of-sight based on observable data and atmospheric delay data, the observable data indicating an observable of a radio wave from a positioning satellite measured by a receiver to receive the radio wave from the positioning satellite, the atmospheric delay data indicating an atmospheric delay in the satellite line-of-sight, the atmospheric delay being calculated based on a correction value for at least one of a satellite clock of the positioning satellite or a satellite orbit of the positioning satellite;
• outputting data indicating the wet delay;
• calculating a variance of the wet delay based on the wet delay and a covariance matrix of the correction value for at least one of the satellite clock of the positioning satellite or the satellite orbit of the positioning satellite;
• and
• outputting data indicating the variance of the wet delay.

A weather data assimilation assistance system, comprising:

• a receiver to receive a radio wave from a positioning satellite;
• an atmospheric delay calculation device to calculate an atmospheric delay in a satellite line-of-sight based on observable data and a correction value, the observable data indicating an observable of the radio wave from the positioning satellite measured by the receiver, the correction value being a value for at least one of a satellite clock of the positioning satellite, or a satellite orbit of the positioning satellite;
• and
• a weather data assimilation assistance device to calculate a wet delay in the satellite line-of-sight based on the atmospheric delay in the satellite line-of-sight calculated by the atmospheric delay calculation device, calculate a variance of the wet delay in the satellite line-of-sight based on the wet delay in the satellite line-of-sight and a covariance matrix of a correction value for at least one of the satellite clock of the positioning satellite or the satellite orbit of the positioning satellite, and output data including the wet delay in the satellite line-of-sight and the variance of the wet delay in the satellite line-of-sight.