SSOC Tohban Report for Week 36 ( 6 SEP - 12 SEP , 1993 )
                                K. Akita and M. Takahashi
                                          13 Sep, 1993
0.General
 
   While the 20m antenna was out of use for five days (see 3-2),
Yohkoh was virtualy sleeping (Night mode) all day long. A late 
summer vacation.  Fortunately, Yohkoh woke up in good shape at
the first contact after the antenna repairment. ( ASCA seemed
to have a bad experience after it woke up.)

1.Solar Activity

   Solar Activity of this week was even lower than ever. No C-class 
flare occurred.  X-ray sun is quite dark now.

2.SSOC Operations
2-1. SXT Table Changes
  Sep  8, Pass2(930908-0620)   930908 T1 P2 DEEP CORONA
  Sep  8, Pass4(930908-0827)   930908 T2 P4 ARS1 DARKCAL
  Sep  9, Pass2(930909-0721)   930909 T1 P2 ARS1 STD+LONG

2-2. STT Timer Set
  STT timer was set at pass2 on 7 Sep. The next setting should
be done on 14 Sep.

3.Error and Problems

3-1. SXT/BCS has no error in this week.  

3-2. KSC 20m Antenna trouble
   Due to the strong wind broght by the typhoon #13 last week,
a lock pin which secured the 20 meter Antenna during the storm
was bent and stuck.  The antenna had been un-operational until 
7 Sep.  The lock pin was removed and the antenna is working for
now.  

3-3. KSC S3500 computer trouble
   There was a troulbe receiving the real-time data with S3500
since the first contact this week.  The culprit was a broken 
channel adaptor.  Fujitsu people managed to replace it with
a new one on Friday, earliest possible day with all their efforts.
 
3-4. KSC Fax machine touble
    Group Send function does not work.  Meanwhile, SSOC tobans
should forward the Operation Reports to seven destinations.

4.Special Operations and Calibrations

4-1. Offset pointing
  The 8' east/west offset pointing was done from pass 2 to 
pass 4 on 8 Sep.


5. DSN data
  From 4 Sep 18:00UT (last week) through 7 Sep 8:00 UT 7, all the 
DSN contacts were cancelled since the timer-sequence table could
not be uploaded due to the 20m antenna trouble.  There was a phone
call from J.Espineuva inquiring what was going on.  Maybe Tobans
should let him know about the situation when DSN scheduling are
in the state of SNAFU.  He may need information for his Support 
Summary reports (see apendix).
 
6.Hikitsugi

6-1. Tobans in week 37

  SSOC  Kano(chief), Akita
  KSC   Uchiuzo, Hiraoka  

6-2. Next STT Timer SET

  Pass 4 on 14 Sep ( 10:15 UT )

6-3. Offset Pointing

  8' east/west offpoint operations on 15 Sep

6-4 Terminator program

  Will be continued

6-5 BCS CAL

  TBD

6-6 Gyro Switching ( Y to S )

  NEC requests Gyro Switching operations on 16 and 17 Sep. 
Someone among the core members who is familiar with the 
ACS Maneuvering at the initial operation phase should 
take care of the whole operations.
They will test S gyro on 16th.  If the result is satisfying,
Y gyro will be substituted by S gyro  next day.