SSOC Tohban Report for Week 40 (27-Sep-99 -- 03-Oct-99) SSOC: M. Hagino, J. I. Khan KSC: Y. Saitoh, M. Nishio 0. Meeting Attendance Hagino, Handy, Hara, Hudson, Khan, Kosugi, Ogawara, Sasaki, Sakao, Sawa, Shirts, Watanabe ---------------------------------------------------------------------------------- 1. Solar Activity Solar activity was low for most of last week, but showed an increase over the weekend with many GOES C-class flares associated with regions emerging from behind the east limb. ---------------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded during week 40: ================================================== UT Date & Time Pass Table ID ================================================== 27-Sep-99 14:13 1 990927 P1 ARS1 DIFFUSER 27-Sep-99 19:20 4 990927 P4 ARS1 STD 28-Sep-99 12:45 1 990928 P1 ARS1 IL 28-Sep-99 16:08 3 990928 P3 ARS1 DARK 29-Sep-99 12:58 1 990929 P1 ARS0 IL 29-Sep-99 18:04 4 990929 P4 ARS1 STD 30-Sep-99 16:35 3 990930 P2 ARS0 IL 30-Sep-99 20:01 5 990930 P3 ARS1 STD 02-Oct-99 17:03 4 991002 P4 ARS1 STD ================================================== 2.2 STT Timer setting STT timer was set during Pass 1 of 28-Sep-99 (UT). ---------------------------------------------------------------------------------- 3. Special Operations 3.1 HXT Calibrations We carried out HXT calibrations as follows: ========================================= Pass ID UT Date Pass ========================================= 990927-0929 27-Sep-99 (Mon) 1 990929-0930 29-Sep-99 (Wed) 2 990929-1033 29-Sep-99 (Wed) 3 990929-0930 29-Sep-99 (Wed) 4 ========================================= We also carried out an HXT Fine Scale Adjustment as follows: ========================================= Pass ID UT Date Pass ========================================= 990928-1033 28-Sep-99 (Tue) 3 ========================================= 3.2 Satellite Normal Pointing Yohkoh Satellite Normal Pointing was adjusted on pass 5 of 28-Sep-99 (Tue) (pass ID: 990928-1248). ---------------------------------------------------------------------------------- 4. Errors and Problems 4.1 BCS Errors: None 4.2 SXT Errors: None ---------------------------------------------------------------------------------- 5. NASA Station Scheduling 5.1 Contact pass cancellations/additions The following DSN/NASA passes were added/deleted: ============================================================================== DSN/NASA Schedule Week Schedule Changes ============================================================================== Real-time 40 0 Cancellations by SSOC 5 Additions Requested by SSOC (to fill large gap on DOY 274) -- 0 Received due to Other Support Preliminary 41 4 Additions Requested by SSOC, -- 0 Received (large gap on DOY 278-279) Final 41 10 Cancellations by SSOC (all Santiago) 4 Additions Requested by SSOC, -- 1 Received Preliminary 42 1 Cancellation by SSOC 8 Additions Requested by SSOC, --Awaiting Outcome Strawman 43 71 Cancellations: Conflicts: 26, SSOC: 45 ============================================================================== 5.2 Data Transmission from NASA Ground Stations -(From /home/flare1/yohkoh/dsn_corrupt/99_40)--------------- 257 80 1331 corrupted tape requested 21-Sep Closed/ same data 262 80 0751 corrupted tape requested 21-Sep Closed/ same data 262 80 1114 corrupted tape requested 21-Sep Closed/ same data *263 80 0805 corrupTed tape requested 24-Sep Closed/ same data 265 80 1154 corrupted tape requested 28-Sep Closed/ same data 265 80 1337 corrupted tape requested 28-Sep Closed/ same data 268 80 0549 corrupted tape requested 28-Sep Closed/ same data DOY-266 W80 0703-0715 0845-0859 1027-1041 G16 1200-1214 S74 2236-2248 DOY-267 W80 0536-0546 ; There were no dump modulation on these passes. ---------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In Week 40, 11 KSC contacts were lost, all to ASCA. In Week 41, 12 KSC contacts will be lost, all to ASCA. ---------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for Week 41 SSOC: Te. Watanabe, D. Sasaki KSC: Y. Saitoh, D. Suzuki 7.2 STT Timer Setting The next STT TIMER SET is due on Tuesday, 05-Oct-99 (UT). 7.3 Holiday Schedule Next Yohkoh holiday will be Sunday, 10-Oct-99 (JST). 7.4 KSC Passes Immediately Before & After Weekend `Holiday' Operation For future weeks, it would be nice if Yohkoh could get KSC passes 4 AND 5 prior to each weekend operation, AND passes 1 AND 2 immediately following. Doing this would allow help us very much to retain an adequate number of NASA passes through the weekend. 7.5 Tohban Manual The English-language version of the Tohban Manual has been updated recently and should be considered authoritative. The corresponding checksheet is also new (August 1999). ------------- The Following is Unchanged from Last Week -------------- 8.1 Weekend Terminators If possible, please schedule terminator opportunities on any weekend table (i.e., if room permits). 8.2 Keeping Santiago contacts Currently, ASCA conflicts cause the loss of about 10 KSC contacts per week. We do not know which contacts Yohkoh will lose until the weekly meeting. Santiago contacts occur on the same orbits as KSC contacts. Therefore, please keep as many Santiago contacts as possible in the DSN Strawman and Preliminary Forecasts. 8.3 OP and Real-time Command Glossary We need a shorthand glossary for common OP and command-sheet commands. This already exists pretty much in the Sakao-san manual in Japanese, and the Week 26 tohbans started accumulating an English version on "yohkoh.glossary" 8.4 Software Problems pr_gev with /hc keyword produces a temporary output file but does not print it at the printer. 8.5 OP_FIRST_GUESS problem (w38) 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. === END ===