Design and Installation

We will add further information to this section in the future

Data and Data Products

Metadata

Metadata are ancillary data about each strainmeter station, instrument operation, and data analysis, which will be collected and stored in the PBO Operational Database (POD). The POD will contain such metadata as station locations, site descriptions and photographs, equipment types, network state of health, and other similar information. All visits made to a given station and any change in station configuration will be documented in the POD. Finally, derived data products, such as the tidal admittance and the scale factors required to convert single gauge measurements to areal and shear strain, are also considered metadata and will be retrievable from the POD.

Data Acquisition

PBO LSM data will be buffered on-site and downloaded at least daily to PBO HQ via sftp running over direct Internet connections to each LSM station. LSM data will then be sent both to Scripps Institution of Oceanography, where SIO staff under the supervision of Duncan Agnew and Frank Wyatt will analyze the data and produce higher-level LSM data products, and to the PBO Strainmeter Archives for storage.

Data Analysis and Products

PBO will provide raw data, metadata, and two levels of processed data from long-baseline laser strainmeters. All these data products will be available from the Strainmeter Archives and the EarthScope Data Access System in either SEED or XML format.

Level 0 LSM data products include raw laser fringe counts and fiber anchor and environmental time series, and will be updated as rapidly as they can be moved from the stations to the archives. Level 1 LSM data products will include time series of gauge data that have preliminary corrections done automatically and that have been rescaled to natural strain units. These will be updated within 24 hours. Level 2 LSM products will be corrected for all known environmental effects, including fiber anchor signals, and will be filtered from 1 sample per second to 1 sample every 300 seconds.

Data Access

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Download Data

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Related PBO Publications

• Plate Boundary Observatory Data Management Plan (June 9, 2004)
• PBO Strainmeter Update (May 26, 2004)