SSOC TOHBAN REPORT FOR WEEK 15
                            (11 - 17 April 1994)

                          Prepared on  18 April 1994
                            Y. Kato and Y. Hanaoka

1 SOLAR ACTIVITY

1.1 The Sun was quiet again last week with only three events exceeding
    the GOES B2 level. The largest one was a B3.7 event.


2 STANDARD OPERATIONS

2.1 SXT table uploads

    Date(UT)      Pass            ID
    --------      ----            --
    Apr.12        940412-0308     940412 P2 FIX SPECIAL 1
    Apr.12        940412-0515     940412 P4 ARS-1 STD+LONG
    Apr.13        940413-0413     940413 P3 ARS PATROL TST
    Apr.13        940413-0516     940413 P4 ARS1 DKCAL
    Apr.14        940414-0206     940414 P2 FIX SPECIAL 2
    Apr.15        940415-0207     940415 P2 ARS1 STH OFFPNT1
    Apr.15        940415-0414     940415 P4 ARS1 STD+LONG

2.2 STT Timer Set - Executed on 12 April.
    Next STT Timer Set should be executed on 19 April.

2.3 QUIET RATE MEDIUM was inserted in SAA's wherever possible.

2.4 Offset pointing
    A south offpoint was performed for the special observation of the
    south coronal hole.

  offpoint 8' south  (Apr.15 03:20 UT; 940415-0207)
  normal point       (Apr.15 06:45 UT; 940415-0414)

3 SPECIAL OPERATIONS

3.1 Calibrations

   BCS calibration was carried out successfully this week;

    BCS Cal Stim cal 940413-0309
    BCS source cal between passes 4 and 5 .

3.2 KSC 20m antenna repair
    Due to the antenna repair, the operation on Apr. 16 (Sat) was
    cancelled.

4 ERRORS AND PROBLEMS

4.1 Instrument Errors - No error!

4.2 On Saturday (Apr. 9) and Monday (Apr. 11) we cannot send the OP
    table to the mainframe SSOC#01.  However, one of the SSOC tohban
    (Y.K.) found that the file 'SR0001.OPSEQ.INFILE' on SSOC#01 must
    be condensed.  After the condense, the file transmission worked well.

4.3 False flare - A B1-class flare occurred during H-alpha/He10830 filament
    observation of SXT on Apr. 12, and then the SXT table was
    changed for the normal active region observation.
    However, the flare flag was triggered by an SAA event, not by the
    B1 flare.  Please take care of the false flare flags.


5 DSN COMMUNICATIONS

5.1 We requested 3 additions, 2 deletions, and 1 shift of DSN passes
for the week 16, but only the request of deletions and a shift was turned
down.

5.2 The cancellation of the DSN pass on Apr. 17 was informed us after the
operation on Apr. 15 (Friday).  We could not take action this
cancellation.


6 HIKITSUGI

6.1 Yohkoh/Asca Pass Conflicts
    In the week 15, there was no conflict between Yohkoh passes and
    Asca ones.  Preparing the schedule of the week 16, we found one
    hour or more clearance between Yohkoh's 5th pass and Asca's 1st
    pass.  Therefore we had no conflict at all, but the next tohbans
    have to take care of the relation between Yohkoh passes and Asca
    passes and have to negotiate with Asca people to make the
    schedule.

6.2 NASDA's schedule around the golden week was fixed.

6.3 There was no operation on Saturday due to the repair of KSC 20m antenna
    as well as in the week 15.

6.4 The fax machine in the Asca operation room has frequently
    troubled.  Most of the troubles were due to paper jam.

6.5 Tohbans for W16 (Apr 18-24):

    SSOC: Watari and Alexander
    KSC:  Masuda and Hara