The Heliophysics Data and Model Consortium was created to provide coherence and long-term support for a number of aspects of the HPDE, including VxOs and related services, RAs, and upgrades to existing data products. The HDMC is under the direction of a Project Scientist and an Implementation Working Group consisting of representatives of all relevant subgroups. Meetings and telecons are held and subgroups are appointed as needed to advance the work. The HDMC works closely with SPDF and SDAC, as well as with nonNASA groups such as NSF and the HELIO initiative in Europe to provide data and related services to the HP community efficiently and usefully. Assessments of the progress of the HPDE and VxOs are contained in the HDMC report to the Heliophysics Data and Computing Working Group and a progress report to a Working Group of the Decadal Survey committee. Earlier activities are reported in the May 2010 HDMC progress report.
The task of providing unified access to all of Heliophysics data is a large one, so it has been divided into a number of sub-discipline related Virtual Observatories. To make sure these are coordinated, the VxOs (where "x" refers to an area such as "Magnetospheric") are all part of the HDMC. A major task of the VxOs is to generate the uniform metadata ("SPASE") required to allow easy discovery of and access to data. See the "Data Access" link above for more details.
Traditionally in Heliophysics, when a mission ended it would be given some time to deliver final products to NSSDC, but there was no clear plan for continued access to these products. The HP Data Policy now defines "Resident Archives" that are funded to continue access to mission data, and "Final Archives" that are where data products will remain accessible for the long-term. Resident Archives are not intended to do much improvement of the data, but rather to keep data flowing in a useful manner, and to provide expert help with the data as needed by the community. It is expected that RAs will have a plan to transition the data to a Final Archive, and in a number of recent instances, much of the data is going directly to a Final Archive, making this transition easier. An RA typically will provide a higher level of service for the data (more tools) than the Final Archive for as long as this is deemed useful by the community and Senior Reviews. As the process of moving data to final archives during the active mission phase becomes more robust, the need for RAs will decrease.
Many older datasets are not used because they are in archaic formats or not well organized for modern access methods. The HDMC oversees the continual upgrading of these older data sets, with the priorities determined through NRA competition. This has been a very effective route for both making older data more widely used and for maintaining access through, for example, the upgrade of older hardware.
Value Added Services
The more uniform access to data provided by uniform descriptions and VxO "middleware" makes it possible to add services that would not have been otherwise practical. Thus, for example, projects are underway to provide access to solar data using a "Helioviewer" visual interface and the VSO as a backend service, to provide uniform access to Event Lists, and to remove the impediments imposed by the existing variety of formats for datasets.
A Complete list of HDMC projects
Here are the projects that have been funded by competition in the VxO/HDEE offering in ROSES, all of which now fall under the HDMC, given by category of award and the by the year of the ROSES call that is relevant for the task. Also included are a number of tasks that are not HDMC funded, but are relevant to the HPDE. Here also are the abstracts for the all the awards: