A Wave Measurements HF Radar Data Set in the Malta-Sicily Channel: Data Quality, Validation and Gap Filling

8 pages•Published: September 20, 2018

Marco Picone, Arianna Orasi, Aldo Drago, Fulvio Capodici, Giuseppe Ciraolo, Gabriele Nardone, Joel Azzopardi, Adam Gauci and Anthony Galea

Abstract

The CALYPSO HF radar network is a permanent and fully operational observing system currently composed of four CODAR HF stations. The system is providing real- time hourly maps of sea surface currents and wave data in the Malta-Sicily Channel since 2012. Significant wave height derived from the HF radar wave measurements are confirmed to be a reliable source of wave information even in case of extreme events. However, it is noticed that the HF radar wave data are subject to differing interfering noise in the signal from unknown sources that may be competing with transmissions in the same frequency band. These interferences lead to frequent gaps and/or outliers that affect the continuity and reliability of the data set. The aim of this work is to estimate missing values and to detect possible outliers building and fitting a Markov chain mixture model on the significant wave height data collected at the four stations. It is verified that the proposed procedure is sufficiently robust since the model estimates succeed to classify radar observations with a high percentage of missing data and to equally highlight spikes and outliers.

Keyphrases: gap filling, hidden markov model, quality control, radar hf, wave measurements

In: Goffredo La Loggia, Gabriele Freni, Valeria Puleo and Mauro De Marchis (editors). HIC 2018. 13th International Conference on Hydroinformatics, vol 3, pages 1656-1663.

Links:	https://easychair.org/publications/paper/KCRf
	https://doi.org/10.29007/wg8s

BibTeX entry

@inproceedings{HIC2018:Wave_Measurements_HF_Radar,
  author    = {Marco Picone and Arianna Orasi and Aldo Drago and Fulvio Capodici and Giuseppe Ciraolo and Gabriele Nardone and Joel Azzopardi and Adam Gauci and Anthony Galea},
  title     = {A Wave Measurements HF Radar Data Set in the Malta-Sicily Channel: Data Quality, Validation and Gap Filling},
  booktitle = {HIC 2018. 13th International Conference on Hydroinformatics},
  editor    = {Goffredo La Loggia and Gabriele Freni and Valeria Puleo and Mauro De Marchis},
  series    = {EPiC Series in Engineering},
  volume    = {3},
  publisher = {EasyChair},
  bibsource = {EasyChair, https://easychair.org},
  issn      = {2516-2330},
  url       = {/publications/paper/KCRf},
  doi       = {10.29007/wg8s},
  pages     = {1656-1663},
  year      = {2018}}

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