LASCO/EIT Operations Status Daily Reports -- December 1999 ----------------------------- C2-C3-EIT synoptic = EIT 195A 12 minute; C2 20 minute; C3 30 min cadence C2-C3 Daily Polarizer Sequences in Orange Filter Weekly, Dark Cal Images (Sat) C1,C2,C3 at 0 and 60 Sec, EIT at 0 and 3 sec. (Sat) C2,C3 Blue Polarizer Sequence, (Sun) C2,C3 Deep Red Polarizer Sequence (Sat) C2,C3 Color Sequence Images, 2x2 binned (03:00 UT) ------------------------------------------------------------------------------- 31-Dec-1999 (C2-C3-EIT synoptic) TM Submode 6 30-Dec-1999 (C2-C3-EIT synoptic) TM Submode 6 19:38 UT uplinked l_set_lobt (set lasco time) 29-Dec-1999 (C2-C3-EIT synoptic) TM Submode 6 28-Dec-1999 (C2-C3-EIT synoptic) SOHO-95; TM Submode 6 SOHO-95 Comet discovered by K.Cernis. Visible in both C2 and C3 data from 07:00-20:00 UT in the South East quadrent. This is a NON-sungrazing comet (C/1999/Y2). 17:58 UT uplinked l_set_lobt (set Lasco time) 27-Dec-1999 (C2-C3-EIT synoptic) TM Submode 6 26-Dec-1999 (C2-C3-EIT synoptic) Colors; TM Submode 6 Weekly C2,C3 deep red filter polarizer sequence taken. 25-Dec-1999 (C2-C3-EIT synoptic) Darks,Cals,Colors; TM Submode 6 Weekly C2,C3,EIT dark images taken. Weekly EIT calibration lamps x2 taken. Weekly C2,C3 color sequence taken. Weekly C2,C3 blue filter polarizer sequence taken. **** Merry Christmas from the EIT/Lasco Operations Team! **** 24-Dec-1999 (C2-C3-EIT synoptic) C3 Milky Way; TM Submode 6 17:55 UT C3 Milky Way Galaxy observations. FFFres images in clear,deep red, orange, and blue filters. 18:21 UT uplinked l_set_lobt (set Lasco time) 23-Dec-1999 (C2-C3-EIT synoptic) C3 Milky Way; TM Submode 6 10:42 UT C3 Milky Way Galaxy observations. FFFres images in clear,deep red, orange, and blue filters. 22-Dec-1999 (C2-C3-EIT synoptic) C3 Milky Way; TM Submode 6 10:42 UT C3 Milky Way Galaxy observations. FFFres images in clear,deep red, orange, and blue filters. 15:00-15:30 UT EIT burn area calibrations. 21-Dec-1999 (C2-C3-EIT synoptic) C3 Milky Way; SOHO-94; TM Submode 6 10:42 UT C3 Milky Way Galaxy observations. FFFres images in clear,deep red, orange, and blue filters. SOHO-94 Kreutz Sungrazing Comet discovered by A. Vourlidas. Fairly bright comet with clearly visible tail seen in C2 data only from 12/21 11:30 UT till 16:06 UT. 20-Dec-1999 (C2-C3-EIT synoptic) TM Submode 6 20:38 UT uplinked l_set_lobt (set Lasco time) 19-Dec-1999 (C2-C3-EIT synoptic) Colors; TM Submode 6 Weekly C2,C3 deep red filter polarizer sequence taken. 18-Dec-1999 (C2-C3-EIT synoptic) Darks,Cals,Colors; TM Submode 6 Weekly C2,C3,EIT dark images taken. Weekly EIT calibration lamps x2 taken. Weekly C2,C3 color sequence taken. Weekly C2,C3 blue filter polarizer sequence taken. 17-Dec-1999 (C2-C3-EIT synoptic) TM Submode 6 20:31 UT uplinked l_set_lobt (set Lasco time) 16-Dec-1999 (C2-C3-EIT synoptic) TM Submode 6 15-Dec-1999 (C2-C3-EIT synoptic) Y2K; TM Submode 6 14:45 UT installed Lasco ground operations software for Y2K. 14-Dec-1999 (C2-C3-EIT synoptic) ICAL001; LEB REBOOT; C1 Test Mask; SM6 17:00-18:30 UT EIT Intercalibration 001 (#6280) with CDS. 22:03-23:00 UT LEB REBOOT 22:38 UT uplinked l_set_lobt (set Lasco time) 23:34 UT Latest C1 masking test for orange pB image saturation. C2,C3 color sequence taken daily through Jan 15th for Milky Way observations. 03:30-04:00 UT. 13-Dec-1999 (C2-C3-EIT synoptic) TM Submode 6 21:07 UT uplinked l_set_lobt (set Lasco time) 12-Dec-1999 (C2-C3-EIT synoptic) Colors; TM submode 6 Weekly C2,C3 deep red filter polarizer sequence taken. 11-Dec-1999 Lasco Doors Opened; C2-C3-EIT Synoptic Resumed; Cals,Colors 00:51 UT Lasco C1,C2,C3 doors opened. 01:29 UT uplinked l_set_lobt (set Lasco time) 02:00 Lasco/EIT synoptic program resumed. Weekly C2,C3,EIT dark images taken. Weekly EIT calibration lamps x2 taken. Weekly C2,C3 color sequence taken. Weekly C2,C3 blue filter polarizer sequence taken. 10-Dec-1999 EIT High Cadence 195A; C2 Door Closed Cal; TM Submode 6 23:00-00:45 UT C2 calibration lamp program for Lamy. Stray light in C2 calibration in Orange filters. 09-Dec-1999 EIT High Cadence 195A; Post ESR-13 Maneuvers Continued. Momentum managements # 2 and 3, and orbit station keep performed. 08-Dec-1999 EIT High Cadence 195A; Post ESR-13 Roll Correction and Momentum Management #1 completed. 21:43 UT S/C roll and pointing now to nominal position. 07-Dec-1999 (C2-C3-EIT synoptic) S/C in Safe Hold in CRP Mode. TM Submode 6 20:00 UT C2, C3 Doors Closed in prep of post ESR-13 roll correction momentum managements and station keeping. 20:17 UT uplinked l_set_lobt (set Lasco time) 20:40 UT EIT begins high cadence 195A with synoptics till Dec 11. 06-Dec-1999 (C2-C3-EIT synoptic) S/C in Safe Hold in CRP Mode; SOHO-93 SOHO-93 Comet discovered by SWAN (Solar Wind Anisotropy Monitor aboard SOHO) data. This NON-Sungrazer comet (C/1997/K2) was dated from June 26, 1997. This comet NOT seen in Lasco data. 05-Dec-1999 (C2-C3-EIT synoptic) S/C in Safe Hold in CRP Mode. TM Submode 6 04-Dec-1999 (C2-C3-EIT synoptic) S/C in Safe Hold in CRP Mode. TM Submode 6 03-Dec-1999 S/C in Safe Hold in CRP Mode. S/C Roll Angle -76 degrees. S/C will remain in roll till Dec 10th for gyroless software patches and post ESR-13 momentum management and station keeping. 05:12 UT EIT begins high cadence in 195A. 05:40 UT uplinked l_set_lobt (set Lasco time) 20:23 C3,C2 doors opened. 20:57 UT uplinked l_set_lobt 21:18 UT C2,C3,EIT synoptic plan begins. C2 orange filter pB sequences 6 hr cad. for Ulysses campaign. Dec 3 through Dec 7. 02-Dec-1999 S/C in ESR-13 Safe Hold; Low rate telemetry; Lasco Doors Closed 22:45 UT medium rate telemetry restored in CRP mode. 01-Dec-1999 Lasco Doors Closed for Post ESR-12 S/C Momentum Managements and station keeping; EIT high cadence 195A program. TM Submode 6. 16:48 UT uplinked l_set_lobt (set Lasco time) 18:41 UT telemetry lost; S/C commanded into ESR-13 (Emergency Sun Reaquisition) safe hold for roll recovery. Telemetry in Low rate. No images while in low rate.