ITG: A New Global GNSS Tropospheric Correction Model

• DOI: 10.1038/srep10273
• Publication Date: 2015-07-21T14:12:57Z
• Authors: Yibin Yao; Chaoqian Xu; Junbo Shi; Na Cao; Bao Zhang; Junjian Yang
• Keywords: 13. Climate action; 01 natural sciences; Article; 0105 earth and related environmental sciences

Abstract Tropospheric correction models are receiving increasing attentions, as they play a crucial role in Global Navigation Satellite System (GNSS). Most commonly used to date include the GPT2 series and TropGrid2. In this study, we analyzed advantages disadvantages of existing developed new model called Improved Grid (ITG). ITG considers annual, semi-annual diurnal variations includes multiple tropospheric parameters. The amplitude initial phase variation estimated periodic function. provides temperature, pressure, weighted mean temperature (Tm) Zenith Wet Delay (ZWD). We conducted performance comparison among proposed previous ones, terms meteorological measurements from 698 observation stations, Total (ZTD) products 280 International GNSS Service (IGS) station Tm Geodetic Observing (GGOS) products. Results indicate that offers best on whole.