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Marinna Martini
Hydratools, a MATLAB based data processing package for Sontek Hydra data The U.S. Geological Survey Woods Hole Science Center (USGS WHSC) has developed a toolbox to convert data collected by Sontek Hydra instruments to netCDF, the standard format used by the WHSC to process and archive time-series data. The USGS makes high-resolution current measurements within 1.5 meters of the bottom. These data are used in combination with other instrument data in sediment transport studies and to develop sediment transport models. Manufacturers provide unique software, binary data formats, and data output formats for their instruments. Multiple formats are cumbersome. The USGS solution has been to translate data streams into a common data format: netCDF. The toolbox is written in MATLABŪ, takes advantage of netCDF format, uses EPIC conventions and organizes metadata with the time-series data. Data are accepted from both the ADV and the PCADP. The toolbox will: detect and remove bad data, substitute other sources of heading and tilt measurements, apply ambiguity corrections, calculate statistics, produce quality information and organize metadata. Standardizing the processing and archiving of data makes these data easily and routinely accessible in a standard format locally and over the internet. Documentation of the techniques provides a reference for others utilizing the data. |
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