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REPORT FOR GEM MINI-WORKSHOP:  DEC. 10, 1995 
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BOUNDARY LAYER CAMPAIGN WG 1:

RECONNECTION ELECTRIC FIELD AND MAGNETOPAUSE BOUNDARY NORMAL MAGNETIC FIELD

What follows is a progress report on the various activities of this working
group.  Included are papers recently completed, presentations at the Fall AGU
meeting, updates given at the workshop, and plans formulated at the workshop.

PROJECT A:  Identify separatrix and 2-dimensional flow versus time across and
in vicinity of separatrix, 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).  No presentation 

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).  Update
presented by Rodger.  Analysis still in progress

3.  27 Jan. 1992:  Period of relatively stable IMF, but radar data not
sufficient for general reconnection studies.  Drop from further consideration

4.  Multi-event study of small-scale structure in reconnection rates (Pinnock
and Baker).  Rodger noted that observations of FTE's being interpreted as
perturbations of separatrix.  Analysis still in progress

5.  Time-dependent analysis of cross-polar-cap potential drop and potential
distribution along separatrix including comparisons with model predictions 
(Hairston, Reiff, Lu). No presentation.  Analysis still in progress


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-SM41C-07). 

2.  Convection reversal boundaries (Clauer).  Clauer noted that different
types of boundaries (shear, rotational, traveling waves) related to solar wind
parameters.  (Clauer-SM41C-9:  Identification of field-line resonant
pulsations  in region of strong dayside shear)


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):  Work not yet started.

2.  Use identifications with SuperDARN (Rodger). No presentation.  Analysis
has begun.

#012#PROJECT D:  First SuperDARN reconnection studies from last years
campaigns

1.  Data not yet 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. 

2.  Greenwald reported on N. hemisphere SuperDARN data for 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:

     Excellent data on 22 Aug., but not on 23 Aug.

     Excellent data also on 21-22 Nov. 

3.  Rodger to examine S. hemisphere SuperDARN dat for the Aug. and Nov. 95
periods (looks like Aug. data may be limited)


4.  It was decided to add the ISTP 18-19 Oct. magnetic cloud event to our
list, and Greenwald volunteered to examine SuperDARN data for this period

PROJECT E:  Polar cap convection and relations to other features

1.  Convection statistics for stable IMF.  Hairston showed DMSP statistics of
zero-potential line over polar caps versus IMF y-z vector for times after 1 hr
of stable IMF.

2.  "Synoptic Space Weather Maps"; polar cap including separatrix, boundary
layers, and AMIE potentials for 27-29 Jan., 1992  (Lyons, Lu, Rich).  Lyons
showed nearly complete results.  The potential importance of a large-scale
"soft electron zone" which may be largely on open field lines was emphasized.


FUTURE GEM CAMPAIGN DATES:

GISMOS/WORLD DAYS

           22-24 Jan. 1996 (was to be for FAST collaboration)

           No more planned at this time

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 (45 hour Eiscat
coverage )  

      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

THIS SPRING:  Good cusp coverage by POLAR; times to be identified after launch