1995 SNOWMASS PROGRAM TAIL/SUBSTORM CAMPAIGN WG 1: SUBSTORM SIGNATURES; IDENTIFICATION, LOCATION, AND TIMING INDIVIDUALS WHO WANT TO PARTICIPATE SHOULD RESPOND TO NELSON AND/OR LARRY AS SOON AS IS FEASIBLE At Snowmass last year three sets of events were identified for coordinated data collection and study. Data was gathered and sent to the coordinators for the initiation of collaborations. A series of substorms in March 1993 was coordinated by Lyons. The January 11-14, 1994, period was coordinated by Maynard. Hughes coordinated several events with CRRES data from 1991. Each of the coordinators developed time lines for each event. These are available by request to the appropriate coordinator. A large amount of data has been supplied, some of which are available through Mosaic home pages. We are extremely pleased with the cooperation of all who have sent data. We would like to reiterate, as we proceed to the analysis phase, that the studies need to remain coordinated. Rules of the road should be the same as those on a number of recent satellite programs: If you use someone's data, offer that person a chance to be part of the study, to have the option of participating as a co-author or to add any necessary and pertinent caveats. Keep the data suppliers and coordinators informed as to who is pursuing what topics and events. Analysis is to begin at Snowmass this year. For each of the three sets of events, the coordinator will review the time lines and representative data for each period. Discussion, more detailed data presentations, and plans for specific studies will follow, focusing on how we can best use the extensive available data sets to improve our understanding of substorms. We will discuss each group of events in order during the first three sessions. The last sesion will be devoted to synthesis of plans and responsibilities for physical interptretation and dissemination of results. A. CRRES Events Four periods have been selected which have the possibility of CRRES, geosync and ground data correlations. 24 Jan. 1991 0810 0700-0900 9 Mar 1991 0200 0100-0300 0600 0500-0700 23 Mar 1991 0235 0130-0330 B. Jan. 1994: Solar wind data is minimal. Excellent opportunity of correlating ground based signatures with GEOTAIL data at 90 Re. Interest at the Dec. 1994 workshop focused on the 13 and 14 Jan. events. Events, including earliest detected onsets in parentheses, are as follows: 11 Jan. 1994 0636UT (0628) 0530-0730 12 Jan. 1994 0450 (0430?) 0350-0550 13 Jan. 1994 0100 (0047.5) 0000-0200 13 Jan. 1994 0315 (0314) 0215-0415 14 Jan. 1994 0630 (0629) 0530-0730 additional active intervals of possible interest: 14 Jan. 1994 20-24 (2235) 20-22; 22-24 14 Jan. 1994 1730-1830 (1925) 16-18; 18-20 Data contributors to the workshop for the January period are as follows: Vassilis Angelopoulos APL GEOTAIL Energetic Particles Rick Doe SRI Sondrestrom Radar and Optical Eigil Friis-Christensen DMI Greenland Mag Data Jeff Hughes BU MACCS Mag Data Bjorn Jacobsen Oslo Svalbard Optical Data Hermann Luhr Braunschweig IMAGE Mag Data Masato Nakamura Tokyo GEOTAIL Mag and Plasma Data Geoff Reeves LANL Geosync Particle Data Fred Rich Phillips DMSP Particles and Drifts John Samson U. Alberta CANOPUS Mag and Optical (Gordon Rostoker) Howard Singer SEL GOES Mag and Intermagnet (Don Herzog) The LANL and APL data are available via Mosaic. C. March 17-25, 1993 Events A wide variety of events have been catalogued with good ground magnetometer, radar, optical, and geosync satellite data. GEOTAIL data is available from near 200 Re. Data available, supplier's name in parenthesis So far available: IMAGE European ground magnetometer (Luhr) GREENLAND magnetometers (Friis-Christensen, Clauer) MAGIC magnetometer, central Greenland (Clauer) SONDRESTROM radar and imaging spectrometer (Blanchard, Doe) CANOPUS ground magnetometer, photometer (Samson, Rostoker) GEOSYNCH. energetic particles from 4 Los Alamos satellites (Reeves) GOES 6 & 7 magnetometers (Singer) MACCS high-latitude ground based magnetometer (Hughes) USGS & GSC DOMSAT ground B from 6 U.S., 9 Canadian stations (Singer) HALLEY BAY radar and ground magnetometer (Pinnock, Dudeney, Rodger) GEOTAIL electric, magnetic fields and plasma parameters (Nakamura) GEOTAIL energetic particles (Angelopoulus) AKR index (Murata, Kojima, Matsumoto) GOOSE BAY radar (Greenwald/Ruohoniemi) Anticipated: ADDITIONAL ground magnetometers (Angelopoulus) ALASKA meridian-scanning photometer (Smith) ANTARCTICA ground magnetometer (Rosenberg) AUSTRALIAN ground magnetometer (Fraser) MEXICO CITY pulsations (name?) Onsets, and original 2 hr study intervals 2350, 17 March 2330 (17th)-0130 UT 0012, 18 March 0234, 20 March 0130-0330 UT 0400, 20 March 0330-0530 UT 0452, 20 March 0535, 20 March (just after official time interval) 0355, 21 March 00-02, 02-04 UT 0530, 21 March 04-06 UT 0233, 24 March 02-04 UT 0450, 24 March (outside of official interval, but potentially interesting) 0519, 25 March 0430-0630 UT 0557, 25 March Larry Lyons (Internet: Larry_Lyons@qmail2.aero.org SPAN: Dirac2::Lyons) Nelson Maynard (Internet: Maynard@zircon.plh.af.mil)