Phase 2
The present focus of the Phase 2 is the conduct of scientific campaigns, involving multi-spacecraft measurements, to address a set of specific questions on the solar-terrestrial environment and its processes.The central role of this joint-mission  activity is played by the  working groupon Solar terrestrial missions (WG 2 in the organizational structure). Consisting of scientists representing each agency, its projects, and its scientific community, this group interacts at the working level to define crucial science objectives that require multiple-spacecraft measurements; to identify the data sets needed for progress toward those objectives while ensuring compatibility of the scientific measurements from the various spacecraft; to identify appropriate models of the solar-terrestrial environment, which can be used for mission planning and for data interpretation; and to formulate policies for the exchange of data, which must be done in a manner that optimizes the research results while protecting the data rights of the principal investigators in an appropriate way.ISTP Rules of the Road. The  working group, also organizes symposia and workshops to involve the larger science communities in defining specific campaigns. These campaigns are accomplished over several periods when spacecraft positions are particularly favorable during the 1990's. As it is difficult to predict spacecraft constellations far in advance (e.g. due to on going orbit optimizations) a period of several months per campaign is assumed for planning purposes. The multi-mission data taking occurs in one or more short intervals (days to weeks) within the longer period.
Only in the context of the international IACG framework can such sustained multi-mission coordination, involving hundreds of Principal Investigators from many countries, be successfully sustained over several years.

Five campaigns have so far been identified:

The First IACG Campaign - Magnetotail Energy Flow and the Role of Non-Linear Dynamics

Lead Coordinator for Campaign 1: Dr. James L Green
The IACG, in Bern October 1998, approved the extension of the campaign for another 5 years through Solar Maximum.


The Second IACG Campaign - Boundaries in Collisionless Plasma

Lead Coordinators for Campaign 2: Dr. H. Kawano and Dr. S. Savin
Co-Coordinators for Geospace: Dr. I. Sandahl and Dr. N. Maynard
The IACG, in Bern October '98, approved the extension through Solar Maximum and the prime Cluster 2 mission.
* The Third IACG Campaign - Solar Events and their Manifestations in Interplanetary Space and in Geospace
Lead Coordinator for Campaign 3: Dr. Richard A. Harrison
Co-Coordinator: Dr. Daniel N. Baker
        The IACG, in Bern October '98, approved that the objectives of this campaign be included in the Solar Maximum (Campaign 5).
 

 
Solar and Heliospheric Observatory (SOHO/CDS)


* The Fourth IACG Campaign - Solar Sources of Three Dimensional Structures in the Solar Wind

Lead Coordinators for Campaign 4: Dr. Antoinette B. Galvin and Dr. Hugh Hudson
The IACG, in Bern October '98, approved the suspension of the campaign for 1 year.
 
* The Fifth IACG Campaign - Solar Maximum Science
Lead Coordinators for Campaign 5: To be determined.
 

* IACG Special Session on Campaign Science at Fall AGU (December 13-17th)
 
 

References for Phase 2

  1. Toward a New Era of Global Solar-Terrestrial Research, The First Inter-Agency Consultative Group (IACG) Campaign: Magnetotail Energy Flow and Non-Linear Dynamics, Report of the Workshop held in Airlie House, USA, June 1-3, 1992, ed. E.C Whipple and H. Lancaster, October 1992.
  2. International Coordination of Solar Terrestrial Science; E.C. Whipple, H. Lancaster, Space Science Reviews 71: 41-54, 1995.
  3. Toward a New Era of Global Solar-Terrestrial Research, Second Inter-Agency Consultative Group (IACG) Campaign: Boundaries in Collisionless Plasmas, Report of the Workshop held in Graz, Austria, April 13-15, 1993, December 1993.
  4. Summary Report on the IACG Workshop on "Solar Sources of Heliospheric Structure Observed out of the Ecliptic", Easton, Maryland, January 27-29, 1994.

    5. Third Inter-Agency Consultative Group (IACG) Campaign "Solar Events and their Manifiestation in Interplanetary Space and In Geospace" , Report of the Workshop held at Sagamihara, Japan, 31 May to 2 June, 1994, July 1995.