SSOC Tohban's Report for Week 39 ( 21-27 Sep 1998) SSOC : Shimizu,Aoki KSC : Yamaguchi,Takahashi 0. Meeting Attendance Ogawara, Kosugi, Watanabe, Sawa, Yaji, Sterling, Hudson, Wuelser Slater, Shimizu ---------------------------------------------------------------------------- 1. Solar Activity Solar activity was moderate or sometimes high last week. There were some active regions showing delta-type magnetic configuration on the disk. On 23 September, AR #8340 produced an M7.1 LDE flare, which caused a major magnetic storm. Only 3 minutes Yohkoh data during the flare peak is on-line in SIRIUS database. Yohkoh observed the entire phase of at least 4 flares with FLARE mode. The flares are listed as follows: (20 Sep 98 02:40- M1.8 #8340 at the end of W38) 22 Sep 98 20:55- C3.4 #8344 23 Sep 98 00:30- C9.8 #8344 (23 Sep 98 07:00- M7.1 #8340 downliked at Camberra. data lost?) 23 Sep 98 22:47- C2.2 #8340 25 Sep 98 23:20- -C3 #8346 ---------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded last week. ----------------------------------------------------------------- JST Day UT Start Time Pass Table ID ================================================================= Monday 21-Sep-98 02:59 3 980920 P3 ARS1 DARKCAL Tuesday 21-Sep-98 23:51 2 980921 P2 ARS1 SPECIAL Tuesday 22-Sep-98 03:17 4 980921 P4 ARS1 DIF Wednesday 22-Sep-98 22:57 1 980922 P1 ARS1 SPECIAL Wednesday 23-Sep-98 01:51 3 980922 P3 ARS1 STD Thursday 23-Sep-98 22:43 3 980923 P2 ARS1 SPECIAL #Postponed due to FLARE mode in Pass 2 Thursday 24-Sep-98 02:09 4 980923 P4 ARS1 STD Friday 24-Sep-98 23:18 2 980924 P2 ARS1 STD Saturday 25-Sep-98 23:18 2 980925 P2 ARS2 NORI #Flare mode started during the table upload Saturday 26-Sep-98 01:01 3 980926 P3 ARS1 STD ----------------------------------------------------------------- 2.2 STT timer setting STT timer was set during pass 3 (980922-0104) on 22-Sep (Tue). ----------------------------------------------------------------------------- 3. Errors and Problems 3.1 BCS Errors No error. 3.2 SXT Errors The table '980921 P2 ARS1 SPECIAL'' contained the wrong parameters. In some FFI exposures, the FFI mode (= J-side Buffer size) was inconsistent with the exposure parameters, causing SXTE-J BUFFER line sync error. Since this error is pulse-like flag, we did not need to clear the flag. The wrong parameters in the table were set with the usage of ``NOCHECK'' mode in SXTSPT. SXT_CO will need to negosiate SXT_ST when he uses NOCHECK mode. ---------------------------------------------------------------------------- 4. Special Operations None. ---------------------------------------------------------------------------- 5. DSN Communications 5.1 DSN Schedule Passes were added/deleted as follows. ------------------------------------------------------------------- DSN Schedule Week Schedule Changes =================================================================== Final W39 0 passes deleted Final W40 1 passes added by SSOC Preliminary W41 0 passes deleted Strawman W42 92 passes deleted by SSOC ------------------------------------------------------------------- Note that we used Hudson's ADD_DSN.PRO to request the pass addition. 5.2 Data Transmission from DSN (Refer to /home/flare1/yohkoh/dsn_corrupt/98_39) 234 66 0203 not received Requested 25 Aug no response 26 Aug no response 28 Aug Closed/ NO DATA RECORDED 252 76 2241 corrupted tape Requested 16 Sep no response tape Requested 21 Sep Closed/ correct data(22-Sep) 253 76 0024 corrupted tape Requested 16 Sep no response tape Requested 21 Sep Closed/ correct data(22-Sep) 253 76 1934 corrupted tape Requested 16 Sep no response tape Requested 21 Sep Closed/ correct data(22-Sep) 261 16 2326 corrupted Requested 24 Sep 260 76 2336 corrupted tape Requested 24 Sep Note: 26 Sep was Seko-san's XXth birthday (by Seko). ---------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In week 40, 3 passes will be given to ASCA and 1 pass to HALCA. --------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for week 40 (28-Sep - 04-Oct) SSOC : Sawa, Hudson KSC : Takahashi, Hagino 7.2 STT timer setting STT timer setting is due on Tuesday 29-Sep(JST). 7.3 Holiday Schedule The holiday during week 40 will be on 05-Oct-98 (Mon), JST. 7.4 OP status. The OP and Command Sheets to be uploaded Monday morning have been prepared. 7.5 Manual and Checksheet A new version of the English Tohban Manual was generated during week 98_36, along with a corresponding new Tohban Checksheet. The new (and all future) Tohbans are requested to note any changes or mistakes in the manual, and to notify A. Sterling of any changes. If the changes involve the DSN procedures or the ~yohkoh/wallops/README file, Hugh Hudson san should also be notified. Current Version Yohkoh Tohban Duties Manual rev. 4-Sep-98, A. Sterling README(Manual for Wallops/DSN Operation ver. 5.1 18-Sep-98 H. Hudson 7.6 Some Problems in OP_FIRST_GUESS In some cases, OP_FIRST_GUESS fails to pick up DSN passes. (See Section 8.4 and 8.5) Tohbans should check OPs and DSN schedules carefully. ---------------------------------------------------------------------------- 8. Action Items 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-36-AI-1 / "ADD_DSN.PRO" / Hudson / status Closed New software (14-Sep-98) now makes it possible to request adding a pass. --- Quote from W36-98 SSOC Report --- It would be helpful to have an "ADD_DSN.PRO" code (modeled on cancel_dsn) to simplify the procedure for making pass addition requests. ---------------------------------------------------------------- 8.3 Week-48-A/I-1 /Hudson/status AJAR. PRINT_OGALL still does not work well. Hudson will fix it next. 8.4 Week-37-98-AI??-1 / "Possible OP_FIRST_GUESS Problem." / ?? / status ?? --- Quote from W37-98 SSOC Report --- OP_FIRST_GUESS failed to pick up a couple of passes from the solass.w37 DSN schedule last week. Here is an example: . . 251 2159 2224 2238 2248 DSS-76 SOL R TKG PASS 8036 xxxxxx- xxx *---------- *WED 09 Sep *---------- 252 2342 0007 0020 0030 DSS-76 SOL R TKG PASS 8037 xxxxxx- xxx 252 0125 0150 0201 0211 DSS-76 SOL R TKG PASS 8038 xxxxxx- xxx 252 1852 1917 1929 1939 DSS-76 SOL R TKG PASS 8049 xxxxxx- xxx In this case, the missed pass was the one beginning at 0007. The problem seems to be that the DSN START time and the BOT times are for different DOY dates. We edited the solass.w37 file so that this line read: 251 2342 0007 0020 0030 DSS-76 SOL R TKG PASS 8037 xxxxxx- xxx OP_FIRST_GUESS then was able to pick up this pass. The other pass that OP_FIRST_GUESS missed had a similar form and was handled in the same way. We notified Jim Lemen of this problem. He hopes to look into this problem over the next couple of months. In the meantime, Tohbans will have to be on the lookout for this sort of problem. (Thanks go to Asizawa-san, who first noticed the missing pass even though he is "green" and was working alone at KSC.) We wonder if this problem has occurred in the past?? ---------------------------------------------------------------- 8.5 Week-38-98-AI??-1 / "Possible OP_FIRST_GUESS Problem 2." / ?? / status ?? Although the newest version of DSN final schedule is ./solarss.w39.1 , the OP_FIRST_GUESS uses ./solarss.w39 . This problem is not severe but better to be fixed. === END ===