SSOC Tohban Report for Week 37 (04-Sep-2000 to 10-Sep-2000) SSOC: S. Watari, S. Eto KSC: K. Matsuzaki, T. Tamura 0. Meeting Attendees Sakao, Watanabe, Kosugi, Sawa, Hudson, Nitta, Nagata, Matsuzaki, Watari, Takeda. ------------------------------------------------------------------------------- 1. Solar Activity Two M-class flares occuered on Monday and Saturday. However, solar activity was still low. ------------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads00_w37 The following SXT tables were uploaded: ==================================================00_w37==================== JST Day UT Start Time Pass Table ID ====================================================================== Monday AM 03-Sep-00 22:56 4 000903 P4 ARS1 DARK* Tuesday AM 04-Sep-00 16:15 1 000904 P1 ARS1 DIFF* Tuesday AM 04-Sep-00 19:39 3 000904 P3 ARS2 TXI* Wednesday AM 05-Sep-00 16:21 1 000905 P1 ARS1 TXI* Wednesday AM 05-Sep-00 19:46 3 000905 P3 ARS1 STD* Thursday AM 06-Sep-00 16:28 1 000906 P1 ARS1 JOP126* Friday AM 07-Sep-00 16:36 2 000907 P2 ARS1 JOP126* Saturday AM 08-Sep-00 16:42 2 000908 P2 ARS1 JOP126* Sunday AM 09-Sep-00 16:49 2 000909 P2 ARS1 JOP126* ====================================================================== 2.2 STT Timer setting The STT timer was set during Pass 2 on Tuesday, 5-Sep-00 JST. (PASS ID: 000904-1236) ------------------------------------------------------------------------------- 3. Special Operations 3.1 Normal Pointing Normal Pointing was updated during pass 1 on 4-Sep-00 (Pass ID: 000904-1133). 3.2 HXT Calibration HXT Calibrations were done during pass 2 on 5-Sep-00(Pass ID: 000905-1237), pass 2 on 6-Sep-00(Pass ID:000906-1237), and pass 1 on 8-Sep-00(Pass ID:000908-1031). 3.3 Support of the TXI Rocket Special SXT tables were uploaded to support the TXI Rocket between 04- Sep-00 and 06-Sep-00. ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 SXT Errors None 4.2 DP Errors None 4.3 BCS Errors An error was detected on 05-Sep-00 pass 2 (000905-1237) and was recovered during next pass. 4.4 S3500 Troubles KSC Tohbans check QL using PC now. 4.5 Flare7's Display Images of Flare7's display were much distorted. The display has been already replaced by Kubo-san. ------------------------------------------------------------------------------- 5. NASA Station Scheduling 5.1 Contact Pass Cancellations/Additions The following schedule changes occurred and/or requested: =========================================================================== DSN/NASA Week Schedule Changes =========================================================================== Final 37 0 additions 0 cancellations Final 38 0 additions 0 cancellations Forecast 39 0 additions; 3 cancellations by SSOC Strawman 40 71 cancellations (Seko: 0, SSOC: 71) =========================================================================== 5.2 Data Transmission from NASA Ground Stations ----(Copied from /home/flare1/yohkoh/dsn_corrupt/2000/00_36)---- 242 80 1608 not received requested 04-Sep Closed/No data No useable data on tape for Solar P/B. 244 66 0627 missing data requested 06-Sep Closed/ TGC failed at AOS. Both channels 13sec data loss, less than 800 TLM Blocks loss. 247 66 0647 not received requested 06-Sep Closed/ No scheduled data(real time cancel) 247 66 0506 missing data requested 08-Sep Closed/ correct data 248 66 0332 missing data requested 08-Sep Closed/ correct data ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule - Yohkoh lost 7 passes (7 to AKEBONO). - There were 2 down-link-only passes on Sunday. - Yohkoh will lose 1 passes (1 to AKEBONO). ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for Next Week SSOC: H. Hudson, H. Nakajima KSC: T. Tamura, M. Hagino 7.2 STT Timer Setting The next STT TIMER SET is due on 12-Sep-2000 (Tuesday) JST. (Pass ID: 000912-1236) 7.3 Holiday Schedule (KSC 34m antenna TEL: 0994-67-3152) The next 34m antena operation holiday will be 17-Sep, Monday JST. 34m antena operations 17-Sep-2000 (JST) 12:37-12:51(UT) (21:37-21:51 JST) 18-Sep-2000 (JST) 16:02-16:15(UT) (01:02-01:15 JST) 7.4 Schedule of Main Frame Computer Main Frame Computer will stop on 17-Sep-00. 7.5 HXT fine gain adjustment HXT fine gain adjustment is planed during pass 2 on 11-Sep-2000. OG will be uploaded for the HXT adjustment on pass 1 on 11-Sep-2000. ------------------------------------------------------------------------------ 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 (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 cancelations). 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 OP Sequence for KSC Operation Using 34 m Antenna (2000-w24) KSC downlink operation with 34 m antenna has started since the end of May 2000. Since we cannot send any command to Yohkoh with 34 m antenna, the downlink operation is conducted with OP commands. 8.7 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. Maybe, a couple of other items should be added to the operation manual ( see 4.4 of w32-2000 report). 8.8 Max Elevation Max elevation must be higher than the following value: Contact Max El.(degrees) Wallops 6.5 Santiago 13.5 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 prpposed 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. === END ===