Interoperable Data Delivery in Solar-terrestrial Applications: CEDARWEB and OpENDAP.

The High Altitude Observatory (HAO) division of NCAR investigates the sun and the earth's space environment, focusing on the physical processes that govern the sun, the interplanetary environment, and the earth's upper atmosphere. We present details on how a set of data systems supported by HAO and collaborators has driven the implementation of services around the Data Access Protocol (DAP) originating in the Distributed Oceanographic Data System (DODS) project. The outgrowth of this is the OpENDAP - an open source project to provide reference implementations of the DAP and its core services. We will present the recent design and development details of the CEDARWEB (NSF program for Coupled Energetics and Dynamics of Atmospheric Regions) service built around the DAP, including interfaces to common application programs, like the Interactive Data Language, the web, and server side data format translation and related services. We also present examples of how the interoperability in the assembly of this system is being used in other science discipline and technology areas: the Radiative Inputs from Sun to Earth program, the Earth System Grid II project, and the Space Physics and Aeronomy Collaboratory.