SSOC Tohban's Report for Week 15 (6 Apr 1998 - 12 Apr 1998) SSOC : Te. Watanabe, K. Hori KSC : S. Sano, Y. Nakagawa 0. Meeting Attendance (in alphabetical order): Hara, Hori, Hudson, Khan, Kosugi, Ogawara, Sawa, Shibata, and Yashiro 1. Solar Activity Following the previous week, solar activity was low. There were many C-class and one M1.1 flare (6 Apr). The C-class flares decayed in long times (more than one hour), which may suggest an existence of an arcade loops in the flare region(?). According to Shiomi_san (NAO), a few of the C-class flares were observed with Nobeyama radio heliograph. The full disk images of 17GHz radio wave length showed brightennings and long decays, which are similar to soft X-ray images. (see ftp://isass0.solar.isas.ac.jp/pub/sxt_co/SXTweekly.html) ----------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded last week. ---------------------------------------------------------------- Pass ID Pass Table ID ================================================================ 980406-0722 3 980406 P3 ARS1 STD 980407-0723 4 980407 P4 ARS1 DARKCAL 980408-0620 3 980408 P3 ARS1 DIFF 980409-0617 2 980409 P2 ARS1 STD 980410-0721 4 980410 P4 ARS1 STD ---------------------------------------------------------------- 2.2 STT timer setting STT timer was set at pass 4 (980407-0723) on 07 Apr (Tuesday), which was soon stopped at pass 4 (980408-0724) on the next day due to an occultation of Canopus. 2.3.1 HXT Calibration None 2.3.2 BCS Calibration None -------------------------------------------------------------------------- 3. Errors and Problems 3.1 SXT Errors and Problems A 'LINE SYNC' error was found at the weekend pass, pass 5 on 11 Apr (980411-0722). It was not cleared by Yobi-A command, thus Yobi-B command was executed by KSC tohbans during the pass. A recovery plan is scheduled at pass 1 on 13 Apr (Monday). 3.2 BCS Errors None 3.3 Orbital Elements transmission trouble. None 4. Special Operations There were no special operations week15 because we had the 3rd SoHO-Yohkoh CDAW at ISAS. -------------------------------------------------------------------------- 5. DSN Communications 5.0 RASM use discontinued NASA ground-station support activities has handed over from JPL to Wallops from mid week10. All the DSN related works should be done using routines under flare20/wallops. The new system uses e-mail and FTP instead of RASM. Temporal manual for the new system is in flare20 /wallops/README file. Please use this version and comment to Hudson san if it has errors. 5.1 DSN Schedule Passes were deleted by DSN and SSOC Tohbans as follows. ------------------------------------------------------------------- DSN Schedule Week Deleted Passes =================================================================== Final W15 3 passes deleted by SSOC Preliminary W16 3 passes deleted and different 3 passes added by SSOC * Strawman W17 0 passes deleted by SSOC -- 10 Apr (fri) --------------------------------------------------- Final W16 4 passes deleted by SSOC Preliminary W17 0 passes deleted by SSOC Strawman W18 68 passes deleted by SSOC ------------------------------------------------------------------- * Since two DSN supports may be lost on 16 Apr (thu) because of Shuttle Support, SSOC requested 3 cancelled passes. 5.2 Data Transmission from DSN DOY DSS BOT 081 17 1344 corrupted Requested 27 Mar no response Requested 01 Apr Closed /same data 081 76 0519 corrupted tape Requested 01 Apr no response tape Requested 07 Apr *081 74 1545 not received Requested 02 Apr Closed /No data 082 74 1422 corrupted tape Requested 01 Apr Closed / correct data 087 66 2308 not received Requested 01 Apr no response Requested 07 Apr 088 66 2326 not received Requested 01 Apr Closed /same data 090 74 1828 not received Requested 07 Apr Closed / No schedule supports 092 76 0145 not received Requested 07 Apr Closed / No schedule supports 092 76 0328 not received Requested 07 Apr *DOY-081 S74 1545(GAGO Email)-- Not able to achieve good bit sync lock with data tape /home/flare1/yohkoh/dsn_corrupt/98_15 made by Ms. Seko-san --------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In week 15, one pass was lost for 20m antenna maintenance. Two passes will be lost during week 16 due to a conflict with HALCA. --------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for week 16 (Apr 13-19) SSOC : K. Shibata, S. Yashiro KSC : Y. Nakagawa(-18), T. Shimizu 7.2 OP and Command Sheets The OP and Command Sheet for Monday (13 Apr) have been created, checked, and transferred to KSC by tobans of week 15. Note: 1) Never forget to send a FAX of a DSN schedule whenever it is changed. 2) If OP is made for a pass more than two times, add a comment on the reviced OP sheet (e.g., VER 2, REV B, and so on). 7.3 STT timer setting STT timer setting is due on 14 April, Tuesday. 7.4 Holiday Schedule The next holiday will be on 19 April, Sunday. (Note: Pass 1 of Yohkoh's week 17 will start at 1:25 UT on 20 Apr (mon).) ===================================================================== || The following is the same as the previous week's report. || ===================================================================== 7.5 DSN scheduling Since 1998, Wallops schedules DSN passes, instead of JPL. The system to communicate with Wallops is still under construction. For details, see README in the subdirectory "wallops" in flare20. All DSN-related software should be run from an IDL session in this directory. 7.6 Bug in op_first_guess SSOC tohbans should be aware of a bug in op_first_guess, e.g., "% OP_START_END: Problem with detection of LOS/AOS/DSN Repro Events". If DSN-related software in the directory ~yohkoh/wallops does not work correctry, for example, see 7dayss.wNN file (which you have obtained through ftp) whether it is written in a manner which is rather different from usual one. 7.7 BDR trouble (See 'DP error' in "SSOC Tohban's Report for Week 02" in 1998.) A DP error (error code = 90 ->75) was found during the data dump at 980106-0411. 2 of 20 BDR blocks are not accessible. As a result, the capacity of BDR is at the moment nine tenth of the normal capacity. This error has not been recovered yet. Please note the special commands, RST BAD BANK & DP DC EXEC, now routinely appearing in the end of command sheets. This is part of the recovery attempt. 7.8 E-mail communications We rely upon e-mail more and more. For operations-related e-mail, it's hereby suggested that we make it a rule to ACKNOWLEDGE the receipt of any such e-mail message. This applies particularly among SSOC, SXT_CO, KSC and SXT_ST. 7.9 Long Range Schedule Arrangement for Planet-B Planet-B will be launched on July 4, 1998 for the mission to Mars. During the flight operation (lasting for twenty six days before the launch window begins), the KSC 20-meter antenna system will be used. After the launch, Planet-B will be tracked by the USD 64m and the newly (to be) installed KSC 34m antenna. Tracking schedule during the flight operation interval will be negotiated among the five teams namely: AKEBONO, YOHKOH, ASCA, HALCA and Planet-B. (Tetsuya WATANABE,NAOJ) * For more information, see a filed report (written in Japanese). 7.10 New database (W10-1998) R. Bentley and S. Freeland have apparently finished installing a new and very convenient database in the Yohkoh system. It is "orb" and one gets orbit data from it via IDL> rd_orb, t1, t2, orb IDL> utplot,orb,orb.height,/ynoz ; for example (/ys/gen/idl/ref_access/rd_orb.pro) Now at last we know where the satellite was at all times! (Hudson) ------------------------------------------------------------------------ 8. Action Items (Same as last week's SSOC Report) 8.1 Further software development. Status CONTINUING. It would be greatly appreciated if the SSOC tohbans could recommend any software development that they think will save future tohbans time and which improves the reliability of their work. 8.2 Week-48-A/I-1 /Hudson/status AJAR. Hudson has fixed print_ogsel (Week 48, 1997). Upon editing the OG's, this command from IDL will print the edited OG item on the workstation printer in B-toh. PRINT_OGALL still does not work well. Hudson will fix it next. After the corrections are made, these procedures should be incorporated into the tohban manual. 8.3 Week-10-A/I-1 /Hudson, Lemen/status OPEN DSN_CONFLICT does not work with the new Wallops files. It needs fixing before the next conflict season starts (perhaps in May?). === END ===