SSOC Tohban report for Week 43 (25 October - 31 October 1993)
				K.D. Leka, N. Nitta (SSOC)
				T. Sakao, Y. Hanaoka (KSC)

1. General
	There were two problems which occurred, neither of which resulted
        in any long-term problems.   These are described in section 6.

2. Solar activity was generally low but 8 C-level flares and 32 >B2 flares
        occurred.  The SXT was operating in a campaign-mode in collaboration 
        with Pic du Midi and Meudon for the entire week, primarily in ARS2
	mode (see below).  As per the gbo mail on 27 October, a 
        spectacular south-pole XRB/jet was observed at approximately 12:50UT.

3. SSOC operations
   3.1 SXT Table Write:
      Oct 25 Pass2 (0826) 931025 T1 P2 ARS2 STD (Changed to T1 P3 ARS2 STD)
						(Recovery - table written
						   Pass4(1032))
      Oct 26 Pass2 (0723) 931026 T1 P2 ARS2 DKCAL
      Oct 27 Pass2 (0723) 931027 T1 P2 DEEP CORONA E
      Oct 27 Pass4 (0930) 931027 T2 P4 ARS2 STD
      Oct 29 Pass2 (0721) 931029 T1 P2 ARS2 STD 
      Oct 30 Pass2 (0722) 931030 T1 P2 ARS1 STD

   3.2 STT Timer Set
      STT timer was set on 26 October.  The next setting should be done
      on Tuesday 2 November.

4. Special Operations
   4.1 Offset pointing
      The 8' deep corona offset pointing east/west was performed 
      On Wednesday 27 October between Passes 2 and 4.  
   4.2 Campaign with France
      SXT was in ARS2 mode primarily during the week, following
      NOAA 7605 until switching to NOAA 7608  on 27 October.  
   4.3 Terminator images were included for all OP's except the weekend
      OP.

   No other calibrations for individual instruments were performed.

5. DSN data
   5.1  The final DSN schedule for week 44 was unchanged, as was
      the preliminary schedule for week 45.  The strawman cancellations
      were sent to RASM and DSN as prescribed.  The SSOC Tohbans
      request that additional documentation be provided for the 
      idl routine "cancel_dsn", as per the annotations in the Tohban
      manual.  
6. Errors
   6.1  SSOC Tohbans did not see any 'Error no. 155' from the mainframe.
   6.2  Spacecraft Error:
         An SEU error for SXT was found on Monday, 25 October, Pass 1, and 
         was cleared by the standard recovery plan.  The associated SXT-J 
         error flag needed an additional command which was issued on the 
         subsequent pass.  Normal spacecraft operations resumed by Pass 5.  
   6.3  OP transmission problem:
	An error in the OP transmission procedure on October 28 caused
        a non-revised OP to be uploaded instead of a revised OP.  
        Fortunately the revision consisted of one minor night command
        and no satellite errors occurred. The SSOC tohbans believe that the
	manual documenting the OP editing should stress more clearly
	that there are two procedures which must accompany any OP revision
        specifically the need to re-enter an OP into the queue in addition
        to transmitting it to KSC, e.g. an edited OP is not necessarily 
        in the queue even though the original is.  
        
7. Notes for next Tohbans
   7.1 week 44 Tohbans: SSOC: Magara, Yatagai
			KSC:  Hanaoka, Kato_Y
   7.2 the RASM password is due to expire on Tuesday
   7.3 The mainframe 2 password should be changed on Monday
   7.4 the STT timer set should be performed on Tuesday
   7.5 Offset pointing should occur Wednesday 3 November between Pass 2,4.
   7.6 OP write and pass sheets for Monday, 1 November have been completed
       and transmitted to KSC.  The first passes of concern (for new
       tables) for the w44 tohbans are Tuesday's.
   7.7 A CCD-bakeout is planned for Saturday, 11/06/93.
   7.8 Discussion should continue about what Yohkoh should do to the transit 
       of Mercury on 6 November.

8. Manuals
   At the Ops meeting, improvement of the tohban manuals were discussed.
   Although no definite conclusion was made, it was agreed that every
   tohban will mail suggested changes to Watanabe_Te san, Kosugi san 
   and Sterling san when s/he finds a problem