Changes

v.2.0 FDSN DRAFT (February 2025)

DRAFT FDSN DAS Metadata Schema v2.0 is created based on the v1.1 DAS-RCN schema with the following changes:

  • Add a requried schema version number

  • Add a FDSN schema identifier ($id)

  • Limit the network_code field to characters allowed by the FDSN Source Identifier specification to ensure compatibility.

  • Remove the channel_group_id, interrogator_id, acquisition_id, and cable_id fields from sub-structures. They are not needed in this hierarchical structure where those values are unambiguous via context.

  • Remove the allowance for optional fields to be specified as null. Whether a field is optional or required is specified using the JSON Schema features and this simplifies the logic for readers determining if an optional field is set. This does not effect the information content of the schema, only the syntax.

v1.1.0 (September 21, 2023)

This updated DAS Metadata Schema introduces significant changes, including the creation of distinct child branches for Cable (and Fiber) and for Interrogator (including Acquisition, Channel Group, and Channel). Subsequent modifications to the GitHub repository consist of minor editorial edits with no major structural or functional changes.

Citation:

  • [journal article] Voon-Hui Lai, Kathleen M. Hodgkinson, Robert W. Porritt, Robert Mellors; Toward a Metadata Standard for Distributed Acoustic Sensing (DAS) Data Collection. Seismological Research Letters 2024;; 95 (3): 1986–1999. doi: https://doi.org/10.1785/0220230325

v1.0.0 (August 24, 2022)

Initial release of the DAS Metadata Reporting Format developed by the DAS Research Coordination Network Data Management Working Group. The schema and framework were outlined in an accompanying white paper (unpublished, no DOI) and supported by two conference presentations.

References:

  • [White paper] Mellors, Rob, Hodgkinson, Kathleen, Lai, Voon Hui, and DAS Data Management Working Group. Distributed Acoustic Sensing (DAS) Metadata Model. May 5, 2022

  • [Conference paper] Mellors, Rob, Hodgkinson, Kathleen, Lai, Voon Hui, and DAS Data Management Working Group. Initial steps towards a DAS metadata model. United States: N. p., 2022. Web. doi:10.2172/2002283.

  • [Conference paper] Hodgkinson, Kathleen Marian, Lai, Voon Hui, Mellors, Robert J., Porritt, Robert William, and Stanciu, Adrian Christian. A Metadata Exchange Model for Distributed Acoustic Sensing (DAS). United States: N. p., 2023. Web. doi:10.2172/2432128.