Halo CME MailHalo CME Mail
Date: Mon, 18 Aug 2003 18:21
From: Gareth Lawrence 
Subject: Partial halo CME on 2003/08/17, possibly frontsided




UCMEO 93001 30818 2315/
30817 61606 92118 0601/ 230// 223// 40166
///// ///// ///// ///// ///// ///// /////
99999
 
PLAIN
 
BT


LASCO observed a wide partial halo CME on 2003/08/17. The 
event was first observed in C2 data at 16:06 UT as a faint 
loop front in the SE; this front spanned 170 deg from PA 60
- PA 230 by 03:06 UT the following day. The front first 
appeared in C3 at 02:18 UT with maximal coverage of the C3 
occultor by 04:42 UT. The mean plane-of-sky speed for this 
event was 166 km/s at PA98, with moderate acceleration.

EIT did not observe a clear eruptive event in association
with this event: due to special LASCO images of Venus
being taken between 15-17 UT there is no EIT data 
available for that period. This event has therefore been
determined possibly frontsided in lieu of unambiguous
data either way.

Movies and images of this event will shortly available at: 
 
ftp://ares.nrl.navy.mil/pub/lasco/halo/20030817

Best wishes,
	Gareth Lawrence.

+----------PLEASE NOTE NEW EMAIL ADDRESS-----------+
Gareth Lawrence,           grl@grace.nascom.nasa.gov 
SOHO-LASCO Operations Scientist,                                           
CUA, MC 682.3, Bldg 26, Rm 001,   F: +1-301-286-0264         
NASA Goddard Space Flight Center,
Greenbelt, MD 20771.              P: +1-301-286-2941
++