SSOC Tohban Report for Week 22 (22-May-2000 to 28-May-2000) SSOC: M. Akioka, T. Yamasaki KSC: M. Hagino, H. Tonooka 0. Meeting Attendees Akioka, Yamasaki, Sawa ,Watanabe ,Kosugi ,Nitta, Ogawara, Sakao, Makishima, Khan , Matsuzaki ------------------------------------------------------------------------------- 1. Solar Activity Solar activity was high but fairly low at last week. There were six GOES M-class flares and several C-class flares. The GOES soft X-ray background level was lower than previous weeks, remaining along C-level all week. There were several active regions in the West hemispheres . New active region appears at 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 22-MAY-00 01:35 4 000521 P4 ARS1 DIFF* Tuesday AM 23-MAY-00 00:01 4 000522 P4 ARS1 DARK* Wednesday AM 23-MAY-00 19:04 1 000523 P1 ARS1 QRFFI* Wednesday AM 24-MAY-00 00:10 4 000523 P4 ARS1 STD* Thursday AM 24-MAY-00 19:12 1 000524 P1 ARS1 QRFFI* Thursday AM 25-MAY-00 02:03 5 000524 P4 ARS1 STD* Saturday AM 26-MAY-00 17:48 1 000526 P1 ARS2 QRFFI* Saturday AM 26-MAY-00 22:55 4 000526 P4 ARS1 STD* ====================================================================== Thuesday,The Table could not curry out in the 4th pass , due to FL-H (DP-MOD). So uploaded in the next(5th) pass . Tables planned for Friday was cancelled : The reason for cancellation was that there was no KSC downlink between pass 1 and pass 4, putting Yohkoh into QT/Med most of the time, and that the experiment It intended is for QT/HI. Tables planned for Sunday was cancelled . 2.2 STT Timer setting The STT timer was reset during Pass 4 on Tue 23-May (UT) (ID: 000523-0001). ------------------------------------------------------------------------------- 3. Special Operations None. ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 SXT Errors None. 4.2 DP Errors A DP Error (code 90) found during pass 1 on Thu 25-May-00 (ID: 000525-1136) This error was single event error as BDR data ,but BDR repro was done normality , and recovered according to the Nomura_san's instruction at pass 1 on Sat 27-MAY-00 (JST) (ID:000526-1136). 4.3 BCS Errors Sunday(JST),BCS error occurred at the 4 pass,and this error was cleared by BCS recovary at the 5 pass. ------------------------------------------------------------------------------- 5. NASA Station Scheduling 5.1 Contact Pass Cancellations/Additions The following schedule changes occurred (requested): =========================================================================== DSN/NASA Schedule Week Schedule Changes =========================================================================== Final 22 (0) additions; 0 cancelation by DSN Final 23 (0) additions; 6 cancelations (SSOC: 1; DSN: 1) Forecast 24 (0) additions; (1) cancelation by SSOC Strawman 25 (59) cancelations (Seko: 8, SSOC: 51) =========================================================================== 5.2 Data Transmission from NASA Ground Stations ----(Copied from /home/flare1/yohkoh/dsn_corrupt/2000/00_22)---- 141 82 1043 corrupted tape requested 23-May Closed/ correct data 141 82 1224 corrupted tape requested 23-May Closed/ correct data 141 82 1406 corrupted tape requested 23-May Closed/ correct data 141 82 1548 corrupted tape requested 23-May 142 82 1558 corrupted tape requested 23-May Closed/ correct data ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule During week 23 Yohkoh will lose 5 KSC passes to ASCA and 4 to HALCA. During week 22 Yohkoh lost 6 KSC passes to ASCA. ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for Next Week SSOC Tohban , Suematu is replaced by Suzuki . SSOC: Sawa Suzuki(30-) KSC: Tonooka Katsukawa 7.2 STT Timer Setting The next STT TIMER SET is due on 30-May-2000 (Tuesday). 7.3 OP OP and command sheets for Monday AM (JST) 29-May-00 was prepared , but have not been sent to KSC. 7.4 The 34 m antenna @ KSC Testing of the 34m carried out during 21-24 May. At this week , 34m ANT tested only monitaring between Pass 2 and 3 on Mon 22-May (UT) (ID : 000522-1342,1445) **** 34m ANT downlink will start from 01-JUN-00.*** [KSC 34m operaton in 6/1 - 6/4] 06/01 12:09 - 12:21 ASCA 13:33 - 13:45 YOHKOH 15:14 - 15:28 YOHKOH 16:56 - 17:10 YOHKOH 06/02 09:59 - 10:11 ASCA 13:41 - 13:54 YOHKOH 15:22 - 15:37 YOHKOH 16:38 - 16:48 ASCA 06/03 13:49 - 14:03 YOHKOH 14:27 - 14:39 ASCA 15:30 - 15:45 YOHKOH 06/04 08:58 - 09:09 ASCA 10:37 - 10:49 ASCA 12:17 - 12:28 YOHKOH 13:56 - 14:08 ASCA 15:36 - 15:46 ASCA 7.5 Holiday Schedule The next satellite holiday will be 04-JUN Sunday UT (= 05-JUN Monday JST). 7.6 Normal Pointing New normal pointing updated by 000524-1239 OP+OG at Wed 24-MAY-00 (JST). +++++++++++++++ Parameter +++++++++++++++ TARGET ANGLE-X -0.0965152 (DEG) TARGET ANGLE-Y 0.00386476 (DEG) BLOCK COMMAND ===> 81 00 F9 2F 00 1F 00 00 -1.03225 -1.66477 COMMAND NAME: S/C W1.66 N1.03 (offset angles in arcmin) +++++++++++++++++++++++++++++++++++++++++ 7.7 Santiago Passes Since week 20 we have no longer been receiving Santiago down-link passes. So currently no Santiago passes should be included in the OPs. However this situation may change in the future as letters are being written requesting their re-instatement. 7.8 DSN Pass Additions *** 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 cancelations 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. Unchanged Hikitsugi Items from Previous Weeks: 8.1 Elevation Angle Limit at Santiago (w49) Seko-san noticed two fault reports from Santiago (DSS-74) due to low elevation at the end of the pass: These were shown as max elevations of 11.1 degrees (323/1322) and 10.7 degrees (315/1645) in our database. Accordingly, after consultation with Watanabe-san, we suggest increasing the threshold (for this station only) to 13.5 degrees maximum elevation. SSOC Tohban for w09 asked Hudson-san to prepare an azimuth-elevation map in Santiago station. 8.2 Weekend Terminators If possible, please schedule terminator opportunities on any weekend table (i.e., if room permits). 8.3 Software Problems PR_GEV with /hc keyword produces a temporary output file but does not print it at the printer. 8.4 OP_FIRST_GUESS Problem (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. 8.5 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. 8.6 OP_FIRST_GUESS Problem (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. ------------------------------------------------------------------------------ === END ===