SSOC Tohban Report for Week 39_95
                 (September 25 - September 30, 1995)

 SSOC: S.Yuda, S.Yashiro
 KSC : H.Hara, S.Hashizume

 1. Solar Activity -----------------------------------------------------------

    Solar Activity was quite low. There was one B9.3 flare. The rise phase of
    this flare was during YOHKOH's night.

 2. Standard Operations ------------------------------------------------------

  2.1 SXT Table Uploads : 4 times

    ---------------------------------------------------------------------
     KSC Time (start: JST=UT+9)  Pass#           Table ID
    ---------------------------------------------------------------------
     28-Sep-95 (00:36)            3         950927  P3 ARS1 DARKCAL
     29-Sep-95 (00:55)            3         950928  P3 ARS1 STD+LONG
     29-Sep-95 (23:31)            2         950929  P2 ARS1 STD+LONG
     30-Sep-95 (22:08)            2         950930  P2 ARS1 STD+LONG
   ---------------------------------------------------------------------

      Each time an SXT Table was uploaded a patrol image was taken by executing
      the command `BC 8C 05'.

  2.2 STT Timer Setting

      The STT Timer was set on Tuesday, during pass 950925-0927.

 3. Errors & Problems ---------------------------------------------------------

   3.1 SXT Errors
       A SXT error, which happened due to the SEU, was found in Pass 1
       on 25 SEP. SXT recovery plan was excuted in Pass 1 and Pass 2.

   3.2 DP Errors
       A DP error which was found during Pass 950923-1343(W38), was recoverd
       in Pass 1 on 25 SEP.

 4. DSN Communications --------------------------------------------------------

   4.1 DSN Final Schedule for W40

      We cancelled 6 DSN contacts from the Final Schedule for W40 (28-Sep).

   4.2 DSN Preliminary Schedule for W41

      We cancelled 1 DSN contact from the Preliminary Schedule for W41(29-Sep).

   4.3 DSN Strawman Schedule for W42

      We cancelled 95 DSN contacts from the Strawman Schedule for W42 (29-Sep).

   4.4 Pass additions

      None.

   4.5 Re-transmission requests

      We sent re-transmission requests for data, (1)DSS 46, 262/06:04-262/06:15
      (2)DSS 16, 262/10:04-262/10:12; (3)DSS 74, 265/16:29-265/16:38; (4)DSS74,
      266/21:56-266/22:08; (5)DSS 66, 269/02:28-269/02:37; (6)DSS76,
      271/04:32-271/04:43.

 5. Yohkoh/ASCA/SFU Pass Conflicts at KSC -------------------------------------

      In W39, 7 KSC passes were lost because of the conflicts with ASCA.
      Next week (W40) we expect 9 KSC passes to be lost.

      There were no pass conflicts between Yohkoh and SFU.
 
 6. Special operation ---------------------------------------------------------

   6.1 Terminators

     Terminator operations were performed 9 times:

         950925-0927 OP    : 05:18:39 Normal
                           : 16:39:11 Normal
         950926-1031 OP    : 16:39:27 Normal
                             05:37:35 Normal
                             10:29:19 Normal
         950927-0825 OP    : 16:58:07 Normal
         950928-0826 OP    : 14:02:24 Normal
                             17:17:04 Normal
                             11:07:28 Normal
   6.2 HXT calibration

       HXT calibrations were carried out 3 times.

 7. Holiday Schedule ----------------------------------------------------------

      The next holiday will be on Sunday, 08-Oct-95.

 8. Hikitsugi Items -----------------------------------------------------------

   8.1 Tohbans for Week #40

      KSC  : H. Watanabe and H. Hara
      SSOC : S. Yasuno and M. Sawa

   8.2 STT Timer Setting

      The next STT Timer should be set on Tuesday, 3-Oct-95.

   8.3 Offpoint terminator images

      If terminators appear in the OP generated by running `op_first_guess'
      then the OP should be faxed to the SXT_CO (Chief Observer) in D-toh.
      The SXT_CO will then inform the SSOC tohbans if offpointing will be
      carried out.  If so, the OP will need to be edited appropriately.

   8.4 Transmission of OP

       Please note that the OP should not be transmitted to KSC during the
       times of SFU passes.  Before transmitting the OP the tohbans should
       check the sheet `Tracking Passes at KSC' to see whether an SFU pass
       is in progress.

   8.5 SXT Patrol Image Dumps

      The command `BC 8C 05(Hex)' should be executed whenever an SXT table
      upload occurs.  This command dumps an SXT patrol image which is needed
      to check the ARS parameters since the Sun is very quiet.