Utilization of GPS Tropospheric Delays for Climate Research

5th International Conference on Theoretical and Applied Physics 2015

Suparta, Wayan^1

Space Science Centre (ANGKASA), Institute of Climate Change Universiti Kebangsaan Malaysia, Bangi, Selangor Darul Ehsan

43600, Malaysia^1

关键词: Accurate estimation;    Main error sources;    Planetary science;    Precipitable water vapor;    Processing technique;    Temporal and spatial;    Tropospheric delays;    Zenith tropospheric delays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/846/1/012001/pdf
DOI  :  10.1088/1742-6596/846/1/012001

来源: IOP

【 摘 要 】

The tropospheric delay is one of the main error sources in Global Positioning Systems (GPS) and its impact plays a crucial role in near real-time weather forecasting. Accessibility and accurate estimation of this parameter are essential for weather and climate research. Advances in GPS application has allowed the measurements of zenith tropospheric delay (ZTD) in all weather conditions and on a global scale with fine temporal and spatial resolution. In addition to the rapid advancement of GPS technology and informatics and the development of research in the field of Earth and Planetary Sciences, the GPS data has been available free of charge. Now only required sophisticated processing techniques but user friendly. On the other hand, the ZTD parameter obtained from the models or measurements needs to be converted into precipitable water vapor (PWV) to make it more useful as a component of weather forecasting and analysis atmospheric hazards such as tropical storms, flash floods, landslide, pollution, and earthquake as well as for climate change studies. This paper addresses the determination of ZTD as a signal error or delay source during the propagation from the satellite to a receiver on the ground and is a key driving force behind the atmospheric events. Some results in terms of ZTD and PWV will be highlighted in this paper.