The SPASE Group generates two "products". First is the SPASE Metadata Model which is an information model for describing the elements of the heliophysics data environment. Second is a set of services and protocols to enable the exchange of information.
Metadata Model Top
The SPASE Data Model will only be described briefly here. The document defining the SPASE Data Model as well as supporting information about it may be found at the SPASE web site. The model is broken down into a number of main elements known as Resource Types, each defining a main topic of data description. The Resource Types are presently:
- Explanatory or descriptive information that is associated with another resource.
- Listing of events or observational notes.
- Plain or formatted text that may include graphics, sound, other multimedia data, or hypermedia references.
- Display Data
- A graphical representation of data.
- Numerical Data
- Data product stored as numerical values in a specified format.
- An accessible portion of another resource.
- A device that is used to sense and parameterize a physical phenomenon.
- The host (spacecraft, network, facility) for instruments making observations.
- An individual human being.
- A location or facility where resources are catalogued.
- A location or facility where resources are stored.
- A location or facility that can perform a well-defined task.
Each of these elements is broken down into sub-elements that provide sufficient detail for adequate description of data sets. The Resource Types Numerical Data, Display Data and Catalogue are the resources used to describe Heliophysics data products. These data product descriptions reference the other resources which contain descriptions of the observatories, instruments, people, etc. that created the data products. The resources are described using the terms from the SPASE Data Dictionary presented in the Data Model document.
Services and Protocols Top
SPASE provides a number of services and protocols which work with SPASE descriptions (XML documents that conform to the SPASE metadata schema). Here are those available from the SPASE Group web site.
- SMWG Registry
- A metadata registry containing descriptions common entities. This includes descriptions of observatories, instruments, persons, registries and services.
- The web SPASE XML editor can be used to create or alter SPASE XML descriptions.
- A web based validator for SPASE XML documents. Use it to determine compliance with any version of the SPASE metadata model.
- SPASE Registry Server
- The SPASE Registry Server is a web application written in Java which providers resolver, search, render and download services for SPASE XML resource descriptions. You can use it to set-up your own SPASE based virtual observatory.
Many people from a wide range of organizations have participated in the SPASE consortium. The origanizations include:
- Augsburg College
- California Institute of Technology (CalTech)
- Centre de Donnees de la Physique des Plasmas (CDPP)
- Istituto Nazionale di Astrofisica (INAF)
- Japan Aerospace eXploration Agency (JAXA) - STP/Ehime
- Japan's Inter-university Upper atmosphere Global Observation NETwork (IUGONET)
- Jet Propulsion Laboratory (JPL)
- John Hopkins University/Applied Physics Laboratory (JHU/APL)
- George Mason University
- Goddard Space Flight Center (GSFC)
- National Aeronautics and Space Administration (NASA) HQ
- National Oceanic and Atmospheric Administration (NOAA)
- NOAA's National Geophysics Data Center (NGDC)
- Rutherford Appleton Laboratory (RAL)
- Stanford University
- Southwest Research Institute (SwRI)
- University of California, Los Angeles (UCLA)