A master metadata repository (MMR) software system manages the storage and searching of metadata pertaining to data from national and international satellite sources of the Global Ocean Data Assimilation Experiment (GODAE) High Resolution Sea Surface Temperature Pilot Project [GHRSST-PP]. These sources (see figure) produce a total of hundreds of data files daily, each file classified as one of more than ten data products representing global sea-surface temperatures. The MMR is a relational database wherein the metadata are divided into granule-level records [denoted file records (FRs)] for individual satellite files and collection-level records [denoted data set descriptions (DSDs)] that describe metadata common to all the files from a specific data product. FRs and DSDs adhere to the NASA Directory Interchange Format (DIF). The FRs and DSDs are contained in separate sub-databases linked by a common field.
This software was written by Edward Armstrong of Caltech and Nate Reed and Wen Zhang of Raytheon ITSS for NASA's Jet Propulsion Laboratory.
This software is available for commercial licensing. Please contact Karina Edmonds of the California Institute of Technology at (626) 395-2322. Refer to NPO-44552.
This Brief includes a Technical Support Package (TSP).
Master Metadata Repository and Metadata-Management System
(reference NPO-44552) is currently available for download from the TSP library.
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Overview
The document is a Technical Support Package for the Master Metadata Repository and Metadata-Management System, associated with NASA's Jet Propulsion Laboratory (JPL). It is part of the GHRSST (GODAE High Resolution Sea Surface Temperature) initiative, aimed at enhancing the understanding and accessibility of sea surface temperature data.
The document begins with an update history, indicating its initial version was released in September 2006, with subsequent revisions to correct typographical errors. It is structured into several sections, including an introduction, background, architecture overview, operations, and appendices detailing the metadata records.
The introduction outlines the purpose of the repository, which is to manage and provide access to metadata related to various datasets, particularly those concerning sea surface temperatures. The background section provides context for the repository's development and its significance in the realm of oceanographic data.
The architecture overview describes the system's design and how it integrates with existing data processing specifications. It emphasizes the importance of metadata in facilitating data discovery and usability for researchers and stakeholders in the scientific community.
Operations are divided into input and output categories, detailing the software used for data processing and the methods for web search and data discovery. This section highlights the tools available for users to access and utilize the metadata effectively.
Appendices A, B, and C provide detailed descriptions of the MMR (Master Metadata Repository) database schema, DSD (Data Set Description) records, and FR (File Record) records, respectively. These appendices include tables summarizing the metadata contents and specifications, ensuring clarity and consistency with the Data Type Definitions (DTD) outlined in the GHRSST Data Processing Specification (GDS).
The document also includes a section on FGDC (Federal Geographic Data Committee) metadata creation, which is crucial for standardizing metadata across various datasets. Additionally, it lists software programs related to the MMR GDAC (Global Data Assembly Center), enhancing the repository's functionality.
Finally, the document provides contact information for further assistance, emphasizing NASA's commitment to making aerospace-related developments accessible for broader technological, scientific, and commercial applications. Overall, this Technical Support Package serves as a comprehensive guide for understanding and utilizing the Master Metadata Repository effectively.
