SSOC Tohban's Report for Week 48 ( 23-Nov to 29-Nov 1998) SSOC : J. I. Khan, M. Weber KSC : S. Yashiro, T. Yokoyama 0. Meeting Attendance Hara, Hori, Khan, McKenzie, Nitta, Sawa, Shimizu, Sterling, Yamaguchi ---------------------------------------------------------------------------- 1. Solar Activity Solar activity was high at the beginning of the week, dropped in the middle of the week, increased again later in the week. There were 3 X-class flares, 2 M-class flares, and many C-class flares. The GOES background hovered near C1. ---------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded last week. ===================================================== UT Time Pass Table ID ===================================================== 22-NOV-98 21:07 3 981122 P2 ARS1 DARKCAL 23-NOV-98 16:16 1 981123 P1 ARS1 DIFF 23-NOV-98 21:24 4 981123 P4 ARS1 STD 25-NOV-98 20:14 4 981125 P4 ARS1 STD 26-NOV-98 17:06 2 981126 P2 ARS2 CDS 26-NOV-98 20:31 4 981126 P4 ARS1 STD 28-NOV-98 14:14 1 981128 P1 ARS2 PFI DOM 28-NOV-98 17:39 3 981128 P3 ARS1 STD 2.2 STT timer setting The STT timer was stopped during pass 3 (981124-1340) early Wed morning 25-Nov JST. The next timer setting should be done early Wed morning 02-Dec JST. ---------------------------------------------------------------------------- 3. Errors and Problems 3.1 BCS Errors None. 3.2 SXT Errors There was a `Filter Software' SXT error found during pass 981125-1031, which was recovered during pass 981125-1134 with the Yobi-A and Yobi-C commands. 3.3 BDR Anomaly None. 3.4 AOSLOS LISTING print-out Problem The orbital elements were loaded automatically into the SIRIUS database, the mainframe orbital elements file was updated but we had difficulty printing the AOSLOS listing with the new orbital elements. With the help of Shimizu-san, the cause of this error was determined to be due to the fact that there were two lines with the new orbital elements in the Sirius database. We have written down the procedure to solve this printout problem and request that it be included in a revised version of the manual. 3.5 Wallops FTP site down On Thurs when we normally get our final schedule for the following week, the ftp site at Wallops was unreachable due to a severed fiber optical cable. We contacted Wallops via phone and they told us the schedules would be sent on Fri by email. 3.6 Missing Wallops contacts in final schedule for W49 On Fri we received the final schedule for the following week via email and ftp. However, this schedule did not contain any of the expected Wallops contacts, making the coverage very sparse. We contacted Wallops via phone who told us they would look into it the next day (after Thanksgiving Day). On Sat we received the final schedule with all of the expected contacts. Due to the late arrival of the final schedule for W49 we had to request a real-time cancellation via telephone, mail, and ftp for Sun-Mon. ---------------------------------------------------------------------------- 4. Special Operations 4.1 BCS CAL A BCS STIM CAL was carried out during pass 98126-1135 and a BCS SOURCE CAL was carried out at about 20:13 UT on 26-Nov. 4.2 HXT CAL HXT CALs were carried out during the following passes: 981128-0929, 981128-1032, 981128-1136 4.3 WBS GRS CAL WBS GRS CALs were carried out during the following passes: 981122-1136, 981123-1133, 981123-1236, 981124-1134, 981124-1237 981125-1133, 981125-1238 ---------------------------------------------------------------------------- 5. DSN Communications 5.1 DSN Schedule Passes were added/deleted as follows. ------------------------------------------------------------------- DSN Schedule Week Schedule Changes =================================================================== Final 49 1 pass deleted, 2 passes addition request Preliminary 50 0 passes deleted, 9 passes addition request Strawman 51 54 passes deleted by SSOC 20 passes deleted for ASCA/Santiago ------------------------------------------------------------------- 5.2 Data Transmission from DSN -(Refer to /home/flare1/yohkoh/dsn_corrupt/98_48)-------------- 324 76 1419 corrupted tape Requested 25 Nov ---------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In week 48 we lost 4 passes to ASCA. In week 49 we will lose 6 passes to HALCA. ---------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for week 49 (30-Nov -- 06-Dec) SSOC : M. Yamaguchi, K. Hori KSC : T. Yokoyama, H. Sekiguchi ---------------------------------------------------------------- 7.2 STT timer setting The next timer setting should be done early Wed morning 02-Dec JST. ---------------------------------------------------------------- 7.3 Holiday Schedule The holiday in week 49 will be on Sunday, 06-Dec-98. ---------------------------------------------------------------- 7.4 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. 5.2 28-Sep-98 H. Hudson ---------------------------------------------------------------- 7.5 Some Problems in OP_FIRST_GUESS In some cases, OP_FIRST_GUESS fails to pick up DSN passes. (See Section 8) Tohbans should check OPs and DSN schedules carefully. ---------------------------------------------------------------- 7.6 DSN Santiago Station DSN Santiago Station(#74) has been not available since 1 Oct. 1998. ---------------------------------------------------------------- 7.7 DSN Pass Additions Yohkoh loses DSN passes as follows: 1) Canceled due to conflicts with ASCA 2) Canceled because Santiago is unavailable 3) Canceled by the SSOC tohbans 4) Deleted by DSN The tohbans could compare the STRAWMAN, PRELIMINARY and FINAL schedules for a given week to see if some of the passes lost by case (4) could be replaced by ones from case (3). This means that it might be possible to request pass additions for the PRELIMINARY and FINAL week schedules from among the requested STRAWMAN cancellations (case (3)). The routine to use is ADD_DSN: e.g., IDL> add_dsn, 49 Decide on the complete list of passes to be added and select them like cancel_dsn. Then ftp and email the appropriate file. ---------------------------------------------------------------------------- 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-48-A/I-1 /Hudson/status AJAR. PRINT_OGALL still does not work well. Hudson will fix it. ---------------------------------------------------------------- 8.3 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. We wonder if this problem has occurred in the past?? In the meantime, the tohbans will have to be on the lookout for this sort of problem. ---------------------------------------------------------------- 8.4 Week-38-98 / Wallops file version number & OP_FIRST_GUESS / Hudson/ CLOSED? Revised Wallops scheduling files now have extensions in their names. Some of our software gets confused and needs to be patched. e.g. although the newest version of DSN final schedule is ./solarss.w39.# (#= version number), the OP_FIRST_GUESS uses ./solarss.w39 . FMT_WALLOPS now writes the scheduling files without extensions and op_first_guess now looks at the latest schedule files. The tohbans should confirm this. ---------------------------------------------------------------- 8.5 Week-48-98 / DSN Pass Additions Procedure / Sterling / OPEN Sterling-san will contact Ogawara-san and Lemen-san to determine a procedure acceptable to DSN to be used for DSN Planning (check policy regarding Wallops passes) and Pass Addition Requests. ---------------------------------------------------------------- === END ===