Key to optimizing the scientific output of ISTP is coordination: coordination of operations to optimize the opportunities for acquiring data needed to accomplish the scientific objectives; coordination in the identification of scientifically interesting periods (events) and event data products; coordination of the analysis of common data. Various approaches and procedures have been established to accomplish these coordinations, and they are working successfully. The key coordinating element is the staff of the ISTP/GGS Science Planning and Operations Facility (SPOF). This facility has at its disposal the most up-to-date models of the Earth's magnetosphere, satellite ephemeri, and state-of-the-art graphics tools for planning the WIND and POLAR spacecraft operations and the ISTP science campaigns. This coordination makes heavy use of the facilities of the World Wide Web. Science operations coordination begins at science team meetings with the establishment of operations priorities for the spacecraft and instruments and with non-GGS spacecraft and especially ground-based facilities. Any scientist can suggest special oper ations by submitting a Science Planning Operations Topic (SPOT) on the WWW. Using this information the SPOF develops the operations plans and distributes them to the instrument operations scientists, who, in turn, generate their instrument commands and mi croprocessor loads consistent with these plans.

The ISTP Program has taken additional pro-active steps to enable the analysis of large quantities of data associated with science events. Any scientist can submit an Event (a special time interval) to the GGS scientists by utilizing a form on the web. Th e identification of GGS recognized events is important since it coordinates the processing of high resolution data and the collaborative analysis of the data by each science team to these specific time intervals. The key parameters and event data are avai lable via the CDAWeb system (both at GSFC and in Germany) that supports the display and coordinated analysis of multi-instrument, multi-spacecraft data. CDAWeb was developed and is maintained by the Space Science Data Operations Office (Code 630 at the Go ddard Space Flight Center). Thousands of interactive accesses are logged every month from scientists who obtain data and plots related to ISTP events and campaigns. The Project also promotes and coordinates analysis by bringing scientists together throug h workshops to discuss data and interpretations in preparation for presentations, publications and scientific meetings. Already during 1997, two highly successful workshops have been held with an average attendance of 140 scientists. The ISTP Program is an international collaborative effort, as the name implies. An international coordinating body - a legacy of the informal scientific coordination of the Halley Comet missions - the Inter-Agency Consultative Group (IACG), plans and coo rdinates scientific campaigns using ISTP and other international resources. Obviously ISTP is a key component of these campaigns and the ISTP ground data system plays a major role in developing the databases and enabling the data analysis associated with these campaigns. Coordination of data analysis also uses the Geospace Energy Model program of the National Science Foundation and the Solar Terrestrial Energy Program administered by the Scientific Committee on Solar Terrestrial Physics (SCOSTEP).

CDAWeb: The Coordinated Data Analysis Web system provides public access to plotting,, listing and downloading of all ISTP Key Parameter data. New data available within 3-5 days of acquisition. A "mirror site" is being established in Germany (at the Equator-S science center) to facilitate access by European scientists Additional mirror sites planned for Russia & Japan. Figure 1-10