*************************** ** THE GEM MESSENGER ** *************************** Volume 6, Number 22 May 3, 1996 ------------------------------------------------------------------- 1996 SNOWMASS: CALL FOR INPUT GEM BOUNDARY LAYER CAMPAIGN WG 1: RECONNECTION ELECTRIC FIELD AND MAGNETOPAUSE BOUNDARY NORMAL MAGNETIC FIELD ------------------------------------------------------------------- From: "Larry Lyons" ********************************************************** Below is list of currently active projects. We will continue with those projects/events for which there is still activity, and identify new events for study. For our preparation of the program for Snowmass 1996: ----WE REQUEST INPUT FROM ALL WHO WOULD LIKE TO PARTICIPATE.--- PLEASE RESPOND BY 21 MAY TO: Larry_Lyons at qmail2.aero.org or A.Rodger at bas.ac.uk If you have expressed interest in the past, your name is identified somewhere and we very much need your responses. Input from others is also requested, including input on relevant projects not currently on the list. ********************************************************** PROJECT A: Identify separatrix and 2-dimensional flow versus time across and in vicinity of separatrix. 1. 29 Mar. 1992: Any further discussions needed? EVENT TO BE USED FOR WG-1 & 5 DATA MODEL COMPARISONS (but not at this year's workshop). 2. Further HF radar studies of dayside reconnection, including reliability analyses (Pinnock/Rodger) 21 July 1992: Excellent Goose and Halley Bay data; well-defined IMF changes. Simultaneous data from both hemispheres in progress; Relation to AMIE (Lu). Multi-event study of small-scale structure in reconnection rates 3. Time-dependent analysis of cross-polar-cap potential drop and potential distribution along separatrix including comparisons with model predictions (Hairston, Reiff, Lu). Further updates? 4. Determination of dayside reconnection rates from incoherent-scatter radar data. Update on technique under development (Blanchard) PROJECT B: Continued studies of Aug. 2-4, 1991 period 1. Analysis of potential and current changes in association with the Stauning et al. poleward progression events (Lu) Further updates? 2. Convection reversal boundaries (Clauer). Different types of boundaries (shear, rotational, traveling waves) are related to solar wind parameters. Further updates? PROJECT C: Identify and test separatrix identification techniques with dayside optical observations, DMSP, and radars. Dates: 6-7 Jan. 1992; 14 Jan. 1994, 6-7 Dec. 1994 1. Compare Halley radar, DMSP, and optical identifications from whatever data can be found (Pinnock, Mende): Any results yet? 2. Use identifications with SuperDARN (Rodger). Analysis has begun. Update. PROJECT D: First SuperDARN reconnection studies from last years campaigns 1. 22-24 Aug. 95 (Three satellites in dawn-side solar wind) and 21-22 Nov. 95. Good WIND IMF data is available for these times: Greenwald: N. hemisphere Rodger: S. hemisphere 2. ISTP 18-19 Oct. 95 magnetic cloud event. Greenwald volunteered to examine SuperDARN data; Rodger has some Halley data. 3. Any data looked at for 11-14 Jan. 94 (1 radar pair, plus Goose and Halley running); 5-6 July 94 (1 radar pair, plus Goose and Halley running); 5-7 Dec. 94 (2-pairs plus Halley running; Halley data excellent on 6 Dec.); 28 Feb.- 2 Mar. 95 (2-pairs plus Finland and Halley running); and WIND tail crossings on 20 Aug., 17 Sept., 29 Nov. PROJECT E: Polar cap convection and relations to other features 1. Convection statistics for stable IMF. Any more from Hairston? 2. "Synoptic Space Weather Maps"; polar cap including separatrix, boundary layers, and AMIE potentials for 27-29 Jan., 1992 (Lyons, Lu, Rich). COMPLETED RESULTS TO USE FOR WG 1 & 5 MODEL/DATA COMPARISONS. 3. "Synoptic Space Weather Maps" for Jan. 12-13, 1989 very stable IMF almost in x-direction. Initial results (Lyons, Lu) PROJECT F: Polar high-altitude data from cusps/dayside boundary layers (Spence) GEM CAMPAIGN UPDATES: GISMOS/WORLD DAYS 22-24 Jan. 1996 (was to be for FAST collaboration) Five nights,12-26 Mar. 1996, for reconnection studies with 2-D imager. WIND in dusk-side solar wind NEAR-EARTH TAIL PERIGEES OF WIND (Need to check comments and timing with Nelson; maybe move to T/S plans) 19 Aug. 2200 to 20 Aug. 0600: Status? 16 Sept. 2200 to 17 Sept. 0600: Good data (some shown at S.F., 1995) 28 Nov. 2300 to 29 Nov. 0500: something happened ~0015 UT 20 Dec. 2200 to 21 Dec. 0600 (45 hour Eiscat coverage ): Dead quiet (Kp = 0) 12 Jan. 2000 to 13 Jan. 0400: Four substorms during crossing (0330, 0715, 1105, 1600) 26 Mar. 1996 1200 to 28 Mar. 0700 17 April 1996 2000 to 18 April 1400UT 9 May 1996 1800 to 10 May 1500UT THIS SPRING: Good cusp coverage by POLAR; times being coordinated by Nelson +-------------------------------------------------------------------------+ |To add name to the mailing list, send a message to: editor at igpp.ucla.edu | |For message to whole GEM mailing list, send to: gem at igpp.ucla.edu | | | |URL of GEM Home Page: http://igpp.ucla.edu/gem/Welcome.html | |Please update your e-mail address. | |CAUTION: Do not send messages to gem at igpp.ucla.edu unless you want | | your message to go to everyone in the GEM mailing list! | +-------------------------------------------------------------------------+