SSOC Tohban Report for Week 51 (11-Dec-2000 to 18-Dec-2000) SSOC: R.Kano, T.Tamura KSC: Y.Nishino, S.Nagata 0. Meeting Attendees R.Kano, Y.Kato, J.I.Khan, T.Kosugi, M.Kubo, K.Matsuzaki, Y.Ogawara, T.Sakao, A.Takeda, T.Tamura, and Te.Watanabe. ------------------------------------------------------------------------------- 1. Solar Activity Solar activity has been low this week. Only one M-class flare occurred on 12-Dec at NOAA 9267. However, since the weekend, GOES background level was gradually increasing, because of a new active region on the east limb. ------------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded: JST Day UT Start Time Pass Table ID ====================================================================== Monday AM 10-DEC-00 20:55 3 001210 P3 ARS1 STD* Tuesday AM 11-DEC-00 17:36 1 001211 P1 ARS0 BAKE* Wednesday AM 12-DEC-00 21:03 3 001212 P3 ARS1 STD* Thursday AM 13-DEC-00 17:43 2 001213 P2 ARS1 DIFF* Thursday AM 13-DEC-00 21:07 4 001213 P4 ARS1 STD* Friday AM 14-DEC-00 19:29 3 001214 P3 ARS1 STD* Saturday AM 15-DEC-00 17:51 2 001215 P2 ARS1 STD* Sunday AM 16-DEC-00 17:55 3 001216 P3 ARS1 STD* ====================================================================== 2.2 STT Timer Setting The STT timer set twice in this week. Tuesday Pass 2 (PASS ID: 001211-1239) Saturday Pass 1 (PASS ID: 001216-1030) ------------------------------------------------------------------------------- 3. Special Operations 3.1 HXT CAL HXT calibration was done three times from Tuesday to Thursday (PASS ID: 001211-1136, 001212-1136 and 001213-1136). 3.2 BCS CAL BCS Stim calibration was done on Tuesday (PASS ID: 001211-1446), and BCS Source calibration was done by OP (11-Dec-00 22:24-22:34UT). 3.3 SXT CCD Bakeout SXT CCD was baked out from Tuesday to Wednesday. Tuesday Pass 1 (001211-1136) load bakeout table Pass 2 (001211-1239) TEC off Pass 3 (001211-1342) heater on Wednesday Pass 2 (001212-1239) heater off Pass 3 (001212-1343) TEC on, and load standard table ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 SXT Errors None 4.2 DP Errors None 4.3 BCS Errors We found a BCS error during pass 3 of Friday morning (PASS ID: 001214-1339). It was cleared in the next pass. ------------------------------------------------------------------------------- 5. NASA Station Schedule 5.1 Contact Pass Cancellations/Additions The following schedule changes occurred and/or requested: ======================================================================= DSN/NASA Week Schedule Changes ======================================================================= Real-Time 51 1 cancellation Final 52 4 cancellations Forecast 53 no cancellation Strawman 54 65 cancellations ======================================================================= 5.2 Data Transmission from NASA Ground Stations ----(Copied from /home/flare1/yohkoh/dsn_corrupt/2000/00_51)---- 335 82 1909 corrupted tape requested 04-Nov no response tape requested 08-Nov Closed/ correct data 340 66 0611 missing data requested 08-Nov Closed/ same data(15940 blocks) Dump data block count lower than expected. VME's were resynched at dump time. 342 76 1613 not received requested 12-Dec no response requested 15-Dec 348 82 0629 corrupted tape requested 15-Dec ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule - Yohkoh lost 4 passes (all for AKEBONO). - Yohkoh lost no pass. ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for Next Week SSOC: Y.Kato, M.Kubo KSC: Nagata(-19), Shinoda(-30), Tonooka(19-30) 7.2 STT Timer Setting The STT TIMER should be stopped on Tuesday, 18-DEC-00 JST, and will be restarted on Saturday, 23-DEC-00 JST. 7.3 Holiday Schedule (KSC 34m antenna TEL: 0994-67-3152) The following 34m antenna operations are planned: 24-Dec-00 13:22 UT 24-Dec-00 18:28 UT 7.4 Special Operation HXT fine gain adjustment and HXT calibrations will be requested in W52. OG write for the gain adjustment was already scheduled in the tonight operation. 7.5 Year-end (Century-end) Schedule The final KSC contact in 20th century is, 29-DEC-00 15:24 UT. The first KSC contact in 21th century is pass1 in the afternoon of 04-Jan-01. KSC tohbans will move to KSC in the morning. ------------------------------------------------------------------------------ 8. Unchanged Hikitsugi Items from Previous Weeks: 8.1 Weekend Terminators If possible, please schedule terminator opportunities on any weekend table (i.e., if room permits). 8.2 Software Problems PR_GEV with /hc keyword produces a temporary output file but does not print it at the printer. 8.3 OP_FIRST_GUESS Problem (1)(1999-w38, 1999-w45) In a situation with two KSC cancellations on each of two days (a rare condition) the BDR optimization feature of OP_FIRST_GUESS crashed. After experimentation, we found that it ran OK without the final cancellation request (two the first day, but just the first one on the second day). The second one then had to be removed manually. Records of the problem were forwarded to Lemen-san, but no answer had arrived at the time of writing. (2)(1999-w46, 1999-w45) During the preparation of 991109-1238 OP, 991110-1135 OP and 991111-1032 OP OP_FIRST_GUESS crashed with the message "OP_START_END: problem with detection of LOS/AOS/DSN Repro events". This problem was solved by changing OP_FIRST_GUESS options: choose optimization 1 rather than 2. 8.4 Keeping Wallops Contacts (1999-w42, 1999-w45) This is not a new policy, but to emphasize (paraphrased from e-mail from Hugh Hudson): We should keep all valid Wallops passes, independent of day/night status, in order to maximize our Wallops use and minimize our DSN use. NASA won't give us many DSN passes anyway, so if we select a Goldstone pass in preference to a Wallops one, we'll normally just lose both. Another reason is that CANCEL_DSN software needs some repair, since it seems to replace the DSS identifier WGS with 0. This is likely to cause confusion, but of course if we don't cancel Wallops passes we won't have this problem often. 8.5 DSN Pass Additions (2000-w20) *** Don't forget to request pass additions! *** Yohkoh loses DSN passes as follows: (1) Canceled due to conflicts with ASCA (by Seko-san) (2) Canceled because Santiago is unavailable (Actually it is now available until end of 2000) (3) Canceled by the SSOC tohbans (4) Deleted by DSN The Tohbans SHOULD COMPARE the STRAWMAN, PRELIMINARY and FINAL schedules -------------- for each week to see if some of the passes lost by case (4) could be replaced by ones from case (3). This means it may be possible to request pass additions for the PRELIMINARY and FINAL week schedules from the (case (3)) STRAWMAN cancellations. (The cancellations by Seko will generally be marked in red ink, and those by SSOC by pencil: Only request additions from the penciled cancellations). The routine to use is ADD_DSN: e.g., IDL> ADD_DSN, 28, /prelim and IDL> ADD_DSN, 29, /final Decide on the complete list of passes to be added and select them like CANCEL_DSN. Then ftp and email the appropriate file. 8.6 34m ANT Operation (2000-w33) 34m Operation will be done only on Sunday (=Yohkoh holiday) for up to 2 or 3 passes. There will be no 34m OP to compensate for the lost pass due to the conflict with the other satellites. For further details, please ask Kosugi-san. Note that 34m operation requires more CE slots in OP table than DSN operation does. Weekend OP cannot accomodate many 34m passes without sacrificing even more DSN passes. Due to the narrow antenna beam, acquision of the signal from the satellite at the first contact need some time. It is suggested that the KSC REPRO should start one minutes later compared to the 20 m operation. (w46) Also, max elevation of the 34 m antenna should be checked carefully using Weekly Visible Diagram (do not trust op_first_guess nor AOSLOS listing). Max elevation should be less than 76 degree. (w46) 8.7 Weekend DNS passes (2000-w49) We used to schedule 12 DSN passes during the weekend, but now we have two passes with the KSC 34m antenna. So only 9 or 10 DSN passes should be scheduled for the weekend. Please be sure to cancel extra passes as early as possible. 8.8 DSN Max Elevation DSN max elevation must be higher than the following value: Contact Max El.(degrees) Madrid 10.0 (2000-w45) Santiago 13.5 (2000-w44) Wallops 6.5 Others 7.0 8.9 OP and SXT Table Transfers Trouble (2000-w34) OP and SXT tables can not be transferred to KSC correctly when the MS computer at ISAS is in Initial Program Load(IPL). ASCA and HALCA groups operate the satellite from ISAS. We must not transfer OP and SXT tables in the following periods: "An hour before the beginning of HALCA/ASCA contact and an hour after the end of HALCA contact." As for IPL of MS computer at KSC, operators confirm if new OP and SXT tables come to MS computer at ISAS after the IPL. 8.10 Pass Conflict Issues In the operation meeting among ASCA, AKEBONO, HALCA, and YOHKOH, held on Thursday 31-Aug-00, ASCA group proposed that (1)they used only one pass a day, time of which is located between 4 and 20 (JST), and that (2)they wouldn't use DSN contacts for ASCA operations. 8.11 STT MAP operation in OP (2000-w42) If possible, please schedule STT MAP operation a few times in one OP. OG-030(DEC) CMPN OBS ON OG-117(DEC) STT MAP START ; 1 step after CMPN OBS ON OG-118(DEC) STT MAP END ; 5 min (10steps) after STT MAP START OG-031(DEC) CMPN OBS OFF ; 1 step after STT MAP END Please put the above set of commands in the Canopus window, manually. It is better to put it during night. Please leave a several minutes for Canopus tracking, before starting STT MAP operation. [end of report]