Accuracy Assessment Study of UNB3m Neutral Atmosphere Model for Global Tropospheric Delay Mitigation

What is it about?

Global Navigation Satellite Systems (GNSS) observations suffers different types of errors .The transmitted signal could face a delay caused by the troposphere of over 2m at zenith and 20m at lower satellite elevation angles of 10 degrees and below. Positioning errors of 10m or greater can result from the inaccurate mitigation of the tropospheric delay.This paper presents an assessment study of the behaviour of the UNB3m global tropospheric model compared with highly accurate IGS tropospheric estimation for three different (latitude/height) IGS stations. The study was performed over four nonconsecutive weeks on different seasons over one year (October 2014 to July 2015).

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Why is it important?

The paper presents an assessment study for the behaviour of the UNB3m global tropospheric model for different latitude stations in different seasons of the year. The reader will decide based on the findings of the research whether the model is meeting his requirements or not.