D. Quality Assurance

FIGURE 3.24 Screenshot showing a typical access page on the OOI Raw Data Server.

hydrophone (HYDBB) data • An initial period of 6 months of full-resolution

HD Video data (.mov files) • An initial period of 10 years of compressed HD

Video data (.mp4 files) • All uncabled raw data currently in the system = ~7.3TB, cabled non-A/V raw data currently in the system = ~11.0 TB, and large format A/V data (HYDBB and HD Video) = ~316 TB.

Despite this published schedule, no data have yet been removed from the RDS. If data are removed from the RDS for space reasons, they would not be deleted from OOI archive systems, and any data not on the RDS would be made available to users upon request.

There are no native search, subsetting (slicing), or conversion tools available directly on the RDS. However, users can apply parsing/processing routines on the data using their own scripts to obtain processed data from the RDS. The RDS is currently the only public-facing repository of data from the cabled high-definition video camera installed at Axial Seamount, and from the cabled broadband hydrophones. C.9 IRIS

In 2014, through a formal NSF-IRIS agreement, the OOI provides data from the broadband and short-period seismometers and low frequency hydrophones at Axial Seamount, Slope Base, and Southern Hydrate Ridge through a different delivery system managed by the Incorporated Research Institutions for Seismology (IRIS) (https:// www.iris.edu) Data Management Center (DMC). IRIS is a consortium of academic and research institutions dedicated to facilitating the study of seismic sources and Earth properties using seismic and other geophysical methods. Among their many data and educational products is a widely used data portal that is the primary source for seismic data in the geophysical community. When a user requests IRIS-served data on the OOI Data Portal, the user is provided a link to an external website operated by IRIS that details all the information needed to query, obtain, make plots, and do basic filtering from the IRIS DMC. A screenshot of the IRIS interface is shown in Figure 3.25. D. Quality Assurance

Along with the vast array of data collected is a

FIGURE 3.25 Screenshot showing a typical data search page on the IRIS data access system.

commensurate commitment to ensuring its quality. The OOI has a team of dedicated operators who constantly monitor the state of the observatory infrastructure as well as the incoming data streams. Along with continuous monitoring of observatory function and data flow, there is a commitment to ensuring data quality. Observatory metadata (information about what is deployed where, calibration history, instrument configuration, etc) is rigorously checked. Any discrepancies are corrected and declared to users through a webbased lookup tool. Major events impacting data availability or quality are included as annotations available to the user during data visualization. These events may be recognized in real time (e.g. a failed sensor) or determined after data recovery (e.g. improper configuration or erroneous calibration). The team also staffs an OOI help desk that responds to user questions and concerns about data quality and/or data access.

The OOI implements real-time data quality control procedures, which are being augmented and updated with the goal of meeting the U.S. Integrated Ocean Observing System (IOOS) Quality Assurance of Real Time Ocean Data (QARTOD) standards. The standards are stringent, ranging from providing a quality descriptor for each observation to ensuring that metadata describe any quality issues that may impact the reliability of the collected data and how those issues have been resolved. The combination of metadata review, data annotations, automated checks following QARTOD and manual checks will provide documented, high quality data for users.