LASCO Activity Report for
April 20, 2004 SOHO Science Daily Meeting

Event times are first frame seen in C2 camera unless otherwise noted.
These are preliminary observations for the daily SOHO science discussions.
Final analysis is reported on the Lasco CME list.
An archive of these reports is available.

Points Of Interest

Comet C/2004 F4 (Bradfield) is visible in the C3 field of view. 
A special observing campaign is in progress (2004/04/16 - 2004/04/20).
Synoptic observations will be modified during this period.

SOHO Telemetry Submode changed to Submode 5 on 2004/04/13 at 16:00 UT 
(SUMER began observing on 2004/04/14). SUMER campaign runs until 2004/06/17.
In other words, LASCO synoptic observation plan cadence remains the same
but the EIT CME watch images will be reduced to half-resolution (512x512).

2004/04/19

	  W Limb	Gusty outflow all over the W limb along the day.

02:08 UT  W Limb	Ragged assymetric front developing slightly toward NW 
			followed at ~04:42 by another one. By 05:42 UT infalling
			material on SW. By 07:42 UT, a faint loop develops at
			the PA of the infalling material.

	18:42 - 21:42 UT	Data Gap.

22:08 UT  E Limb	Ragged front already in progress after data gap. It 
			fades throughout C3. Another (fainter) one developing 
			towards NE.

2004/04/20

	04:54 UT		Last C3 frame where Comet Bradfield is visible
				(upper right). Tail still visible. 

05:08 UT  S West	Ragged loop front and trailing material. Faint extension
			over the S Pole in the form of a diffuse front that 
			quickly fades.

	09:15 - 13:10 UT	Temporary DSN Data Gap.