*************************** ** THE GEM MESSENGER ** *************************** Volume 5, Number 29 October 31, 1995 ----------------------------------------------------------------------- PLANS FOR GEM MINI-WORKSHOP: DEC. 10, 1995 - GEM BL Campaign WG-1 Plans ----------------------------------------------------------------------- From: Larry Lyons (larry_lyons at qmail2.aero.org) BOUNDARY LAYER CAMPAIGN WG 1: RECONNECTION ELECTRIC FIELD AND MAGNETOPAUSE BOUNDARY NORMAL MAGNETIC FIELD 2:15 - 4:15, Moscone Center, Room 256 Note: We have only 1.5 hours. Our goals are to highlight recent achievements, identify opportunities and log jams, discuss campaigns for early 1996, and outline plans for SNOWMASS 1996. Detailed discussions will not be possible. __________________________________________________________ I. BRIEF REPORTS ON PROGRESS SINCE SNOWMASS WITH PAST DATA SETS: -----THOSE WANTING TO PRESENT BRIEF REPORTS SHOULD CONTACT ALAN RODGER AND/OR LARRY LYONS; BELOW IS A REMINDER OF PROJECTS AND DATES AS ORGANIZED AT SNOWMASS LAST SUMMER----- PROJECT A: Identify separatrix and 2-dimensional flow versus time across and in vicinity of separatrix using data from periods of good multi-instrument coverage of the dayside cusp region at ~13 to 16 UT, with IMF available . 1. 29 Mar. 1992: Excellent Goose Bay coverage; variable IMF (IMF only available 1310-1930 UT). Paper on dayside reconnection rates including relation to AMIE flows submitted (Baker, Rodger, Lu). 2. 21 July 1992: Excellent Goose and Halley Bay data; well-defined IMF changes. Reconnection analysis using simultaneous data from both hemispheres in progress; (Pinnock/Baker), including relation to AMIE (Lu). 3. 27 Jan. 1992: Period of relatively stable IMF, but radar data not sufficient for general reconnection studies 4. Multi-event study of small-scale structure in reconnection rates (Pinnock and Baker) 5. Time-dependent analysis of cross-polar-cap potential drop and potential distribution along separatrix including comparisons with model predictions (Hairston, Reiff, Lu). 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). 2. 200-300 nT pulsations in Greenland B in region of strong shear that appears to result from a shear instability (Clauer). 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) 2. Use identifications with superDARN (Rodger) PROJECT D: "Synoptic Space Weather Maps"; plots of whole polar cap including separatrix, boundary layers, and AMIE potentials for 27-29 Jan., 1992 (Lyons, Lu, Rich) _________________________________________________________ II. IDENTIFICATION OF GOOD DATA FOR SEPARATRIX IDENTIFICATION AND RECONNECTION MEASUREMENTS FROM LAST YEARS COMPLETED CAMPAIGNS: (First superDARN reconnection studies) -----THOSE WITH RADAR DATA SHOULD BRIEFLY REPORT ON DATA THAT HAS SO FAR BEEN CHECKED------ a. 11-14 Jan. 94: 1 radar pair, plus Goose and Halley running b. 5-6 July 94: 1 radar pair, plus Goose and Halley running c. 5-7 Dec. 94: 2-pairs plus Halley running (Halley data excellent on 6 Dec.) d. 28 Feb.- 2 Mar. 95: 2-pairs plus Finland and Halley running e. 22-24 Aug. 95 (Three satellites in dawn-side solar wind) f. 21-22 Nov. 95 (Satellite locations?) g. Wind tail crossings: 20 Aug., 17 Sept., 29 Nov. __________________________________________________________ III. Outline plans for Snowmass 1996 based on two objectives: 1. Identify individual events and projects to pursue from those mentioned above. 2. Identify interval(s) with good solar wind, polar cap boundary, and potential pattern coverage such that sufficiently complete results can be obtained for comparisons with models being pursued by WG-5. OTHER IDEAS FOR SNOWMASS 1996 ARE WELCOME, including suggestions for possible tutorial speakers. __________________________________________________________ IV. SOLIDIFICATION OF FUTURE CAMPAIGN DATES: GISMOS/WORLD DAYS 22-24 Jan. 1996 (was to be for FAST collaboration) More?? NEAR-EARTH TAIL PERIGEES OF WIND December 21, 1995: Solstice WIND near tail crossing: GEOTAIL moving towards dusk magnetosheath, IMP-8 crossing the tail (in the lobe?). Sondrestrom. Millstone coverage: 20 Dec. 2200 to 21 Dec. 0600 (move start to ~ 15 UT?) (EISCAT SAC has put a 45 hour CP1/CP4 operation around that passage) Jan. 13, 1996: Three sat. in tail: WIND near 14 Re, GEOTAIL on dusk side further back, and IMP-8 about the same X as GEOTAIL, but nearer or perhaps outside tail boundary Sondrestrom, Millstone coverage: 12 Jan. 2000 to 13 Jan. 0400 (should extend to ~14 UT) Larry Lyons (Larry_Lyons at qmail2.Aero.org) Alan Rodger (A.Rodger at bas.ac.uk) +-------------------------------------------------------------------------+ |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 | |For message to a specific working group (BL Campaign), send to: | | gem_field at igpp.ucla.edu (WG1); gem_boundary at igpp.ucla.edu (WG2); | | gem_current at igpp.ucla.edu (WG3); gem_data at igpp.ucla.edu (WG4) | | gem_ggcm at igpp.ucla.edu (WG5) | | gem_chair at igpp.ucla.edu (WG chairs, Odile and W. J. Hughes) | | | |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! | +-------------------------------------------------------------------------+