Modeling of zenith path delay over Antarctica using an adaptive neuro fuzzy inference system technique

Wayan Suparta, Kemal Maulana Alhasa

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Accessibility and accurate estimation of the tropospheric delay plays a crucial role in meteorological studies and weather forecasts as well as improving positioning accuracy. We propose to employ an adaptive neuro fuzzy inference system (ANFIS) to build estimation and prediction models for zenith path delay (ZPD). Five selected stations over Antarctica were used to examine the applicability of ANFIS. GPS ZPD data of 2010 with five-minute resolution was used as the target output. A fuzzy clustering algorithm is adopted to enhance the performance of the models, which is able to minimize the number of membership functions and rules for better efficiency in the models. To investigate the accuracy of models developed, a combination of the surface pressure (P), temperature (T) and relative humidity (H) is performed to obtain the best estimation of ZPD. The results demonstrated that ANFIS models with three inputs network (P, T and H) agreed very well with ZPD obtained from GPS than separated input only coming from P or T, or P and T, or P and H. Finally, the input network (P, T and H) is selected in developing the ZPD predictive models. The prediction resulted from one-step to eight-step ahead development, demonstrated that the high-resolution of data used in training process will increase the accuracy of the predictive model.

Original languageEnglish
Pages (from-to)1050-1064
Number of pages15
JournalExpert Systems with Applications
Volume42
Issue number3
DOIs
Publication statusPublished - 15 Feb 2015

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Fuzzy inference
Global positioning system
Fuzzy clustering
Membership functions
Clustering algorithms
Atmospheric humidity

Keywords

  • ANFIS
  • Antarctica
  • GPS
  • Modeling
  • Surface meteorological data
  • ZPD

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Science Applications
  • Engineering(all)

Cite this

Modeling of zenith path delay over Antarctica using an adaptive neuro fuzzy inference system technique. / Suparta, Wayan; Alhasa, Kemal Maulana.

In: Expert Systems with Applications, Vol. 42, No. 3, 15.02.2015, p. 1050-1064.

Research output: Contribution to journalArticle

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