LASCO and EIT observed a partial halo CME on 2001/09/20. The event was first observed in C2 at 19:31 UT as a wide loop front in the NW. By 20:06 UT this front spanned some 160 deg over the N Pole from PA 240 to PA 40. The front first appeared in C3 at 20:18 UT with maximal coverage of the C3 occultor by 21:18 UT. The plane of sky speed of the front was measured as 453 km/s at PA 273 (W) with no significant acceleration through the coronagraphs' fields of view. The CME was most probably associated with an M1.5 X-ray flare in AR9631 between 18:12 and 18:21 UT with peak emission at 18:17. EIT also observed this flare between 18:12 and 18:24, peaking at 18:12. SEC places the flare at N09W11 and the disruption was largely localised to the immediate vicinity of this region. No significant dimming or wave was observed in association with this event. Bright post-eruption loops are clearly visible at a later time. EIT and Lasco observed a full HALO CME on 2001/09/24. The event first seen in C2 at 10:30 UT Monday Sept 24, 2001 as a large loop front over the SE limb at PA 120 degrees. At this time it was approx 2.5Rs into the field. Due to the speed we only have one (1) frame to calculate with. C3 sees the event at 10:42 UT with the front over the same area developing to a full 360 degrees with a core and cavity over the East hemisphere. The "averaged" plane-of-sky speed through both C2 and C3 gives 2220 km/sec at PA 105 degrees. This was showing acceleration through C3. This event produced Proton emission seen in the white light images. EIT observed a CME starting in AR9632 located at [S18; E27] at 09:12 UT. As a typical eruption was in progress an x-ray flare occured in the same region with first frame at 10:14 UT and a X2.6 class flare is reported in GOES at this time. A large bright event with a SSE progression and EIT wave seen along North and South directions. Later, an expanding arcade of post loops are active till 14:00 UT. This event is probably associated with the HALO CME seen in Lasco. LASCO and EIT observed a partial halo CME on 2001/09/28. The event was first observed in C2 at 08:42 UT as a bright loop front over the E limb. By 09:30 UT this front spanned some 180 deg over the S Pole from PA 20 to PA 200. The front first appeared in C3 at 09:42 UT with maximal coverage of the C3 occultor by 10:20 UT. Note that the C3 images show a faint emission around the rest of the occulting disk - this is probably existing coronal material being compressed somewhat by the shock. This faint emission is also visible in C2 images but only extremely faintly. The plane of sky speed of the front was measured as 625 km/s at PA 91 (E) with a slight deceleration through the coronagraphs' fields of view. The CME was most probably associated with an M3.3 X-ray flare in AR9636 between 08:10 and 09:10 UT with peak emission at 08:30. EIT also observed this flare between 08:25 and 09:36, peaking at 18:36. SEC places the flare at N10E18. Both a dimming and an EIT wave were observed in association with this event. Bright post-eruption loops are clearly visible from about 10:12 UT. Sep 24, 2001 Shift Report -------------------------- Current ACE solar proton flux levels are increasing rapidly due to an X class flare at about 267:0930. Are now over 1000 and are starting to flatten. As expected based on GOES proton fluxes, SCS 107 had tripped before this afternoon's real-time contact. Both GOES and ACE rates are still rising, so there is little chance that the environment will be acceptable for science measurements soon. Current attitude is safe until day 273 (sun violation), but would be a poor attitude for control of the ACIS radiator temperature at the next perigee pass. Based on the above, a telecon at 3:15 EDT recommended that a new load be built which would begin just prior to rad zone entry of the next pass, and maneuver to the proper ACIS radiator attitude with the anticipation of beginning science after the rad belt exit, i.e OBSID 02058, TIME=2001:269:22:30. Sep 25, 2001 Shift Report -------------------------- SCS 107 ran yesterday at 267:142903 in response to a RADMON trip. S/C is nominal, holding at the trip attitude, good until 273:0300 at which point a sun violation occurs. Recovery load SEP2601 has been generated and will be reviewed today. Load picks up at about 269:1012 with radzone entry maneuvering and commanding, then does outbound CTI after perigee passage and continues with observations. Seg 1 of load must be uplinked on or prior to the 269:0645 COMM pass. Current ACE solar proton flux levels are about 31,000 and rising slowly. GOES-8 data indicate hard proton levels are well above RADMON trip points. EPHIN levels are well above trip points (see below). Sep 26, 2001 Shift Report ------------------------- - Current ACE soft proton flux 150,000 (10:15am EDT) and still decreasing slowly - GOES proton levels are well above trip points for P4GM and P41GM - In 269:0100 pass EPHIN data was VERY high, 20000 for P4GM - EPHIN rates in 269:0745 pass had decreased from peaks in 0100 pass before rising as S/C started to enter rad zone. - All SOT EGSE and GRETA terminal seem to be working OK after SW change Sep 27, 2001 Shift Report -------------------------- Current ACE solar proton flux levels are at about 30,000 and slowly decreasing. Sep 28, 2001 Shift Report -------------------------- Proton flux is high from previous X flare, and dropping steadily. A partial halo CME occurred on 27 Sep. 1213 UT. The CME could have geoeffective extensions. At the 9:15 meeting, the ops team decided to go ahead with the load restart as mentioned above. Radiation environment continues to improve slowly. EPHIN limits are approaching the RADMON triggers, although the current rule of thumb is for them to reach 1/3 of the trigger value before restarting science. Sep 29, 2001 Shift Report ------------------------- Monitor EPHIN rates in realtime to decide if it is appropriate to load and activate the SEP3001 replan loads. If the SEP3001 load is activated, start an ACIS CTI measurement with CAP746C. The radiation telecon group decided to load and activate the SEP3001 load. There will be another telecon at 9pm tonight to update the radiation environment.