LASCO will be participating with the streamers study of UVCS/SUMER/CDS during May 17th through 23rd. It introduces only slight modifications to the LASCO synoptic observation plan: For C2: 6 hr cadence in orange filter pB (02:54 - 08:54 - 14:45 - 20:54 UT) For C3: 12 hr cadence in orange filter pB (10:42 - 22:42 UT) 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) during that period.
00:06 UT E Limb Faint loop front that is brighter above the ESE Limb, most likely because it superposes in the LOS with a preceding (fainter) elongated loop-like structure. It is difficult to give an exact time of first appearance (feature lost at the beginning in the trailing material of previous event). Not discernible in C3. 03:06 UT E Limb Small ragged front. It fades throughout C2. 03:50 UT N East Diffuse front develops as a faint asymmetric loop-like feature, followed at 08:26 by a brighter narrow front at roughly the PA of the northern leg (along streamer). Another ragged front by ~ 14:06 UT. 08:26 UT E Limb Bright elongated feature. EIT Fe XII running difference images show a bright barely backsided CME starting at 07:48 UT. 23:37 UT S East Very faint loop front. It faints very close to the inner edge of C3 FOV.
02:26 UT ES East Ragged fan-like front that precedes a ragged front at 05:26 UT above the E limb, and a diffuse and ragged loop front at ~06:50 UT on the ESE Limb that fades troughout C2. 04:06 UT WS West Bright loop front with twisted inner core. By ~06:50 UT a small and fainter ragged front appears ahead of the southern part of the LE of the bright loop front developing apparently faster. 08:26 UT N East Kind of gusty outflow developing towards NNE, superposed in the LOS with an initially slowly-evolving system of loops. 13:27 UT E Limb Faint and wide loop front brighter above the SE Limb. Very faint in C3, and only close to the inner edge. By ~ 16:06 UT a ragged narrow front appears above the E Limb. It is 'pushed' toward N as it develops. 16:26 UT W Limb Bright ragged loop front, cavity, and bright twisted inner core. It appears at roughly the PA of the northern leg of the event reported to start at 04:06 UT. 20:50 UT E Limb Another faint and wide loop front brighter above the SE Limb. By ~22:26 UT a small ragged front develops above the E Limb and quickly fades.
01:27 UT E Limb Bright and elongated loop front. It fades throughout C3. 02:26 UT ES East Fast fan-like front preceding a very faint loop front at ~05:26 UT, that quickly fades. 02:26 UT N West Small ragged front. Barely visible in C3. 06:50 UT W Limb Extremely faint ragged loop front in the trailing twisted structure of event reported to start at 16:26 UT on previous day. 12:50 UT WS West Small blob-like front. Difficult to establish the exact time of first appearance. Gusty outflow.
05:26 UT W Limb Bright ragged loop front and trailing material. Very faint and diffuse envelope surrounds the front. 05:50 UT N East Kind of 'reconexion' event. Structure flowing out and another one falling down. Separation point at ~ 3.8 solar radii (PA ~ 55 deg). 06:50 UT S East Fast narrow and ragged (diffuse) loop front.