SSOC Tohban Report for Week 06
                     ( 07 FEB  - 14 FEB, 1994 )


                             Yokoyama, Yosimura (SSOC)
                             Yuda, Shimizu (KSC)  



1. Solar Activity

 Solar activity was higher than Week_05, with some C3 class  flares on 9-Feb.
There was also a long-duration and hard C class "event" on 13-Feb.
   
2. Standard Operations

2.1 SXT Table Uploads
                Pass             ID
  (Mon.)  940207-0826  "940207 T1  P4  ARS1 LNG+DIFF"
  (Tue.)  940208-0620  "940208 T1  P2  DEEP CORONA"
          940208-0827  "940208 T1  P4  ARS1 DKCAL"
  (Wed.)  940209-0617  "940209 T1  P4  ARS1 STD+LONG"
  
  

2.2 STT Timer Set

 The STT timer was set three times last week, pass 940207-0620, pass 940208-0620
and pass 940210-0825.It will be set again on Tuesday or Wednesday of week #7.
 

2.3 Offset pointing

The 8' east/west offset pointing was done from pass 2 to 4 on 8-Feb.
 
  (Tue.)  3-Feb  #2 (940208-0620)    east 8 arcmin (ROG #23h)
                 #3 (940208-0724)    west 8 arcmin (ROG #24h)
                 #4 (940208-0827)    normal point  (ROG #20h)
  (Sat.)  12-Feb #2 (940212-0516)    east 8 arcmin (ROG #23h)
                 #4 (940212-0723)    normal point  (ROG #20h)


3. Special Operations

3.1 HXT calibrations
 
   HXT calibrations were done three times, pass 940208-0827, pass 940209-0928
   and pass 940210-0928.
 
3.2 BCS calibrations & SSOC Tohban Error

   BCS calibrations were planed to be performed on Friday (source calibration) `
   and on Saturday (stim calibration).

   (Fri.) 11-Feb 9:31:00   between #3 & #4     BCS SOURCE CAL
   (Sat.) 12-Feb           #2 (940212-0516)    BCS STIM CAL

   The source calibration on Friday was not performed due to 
   SSOC tohbans' error (Sorry).
   The stim calibration on Saturday was not complete due to 
   the accident of the telemetry (See 4.3).

   The source calibration is going to be performed again on Monday of Week07.
   The stim calibration is going to be performed by Tuesday's night's OPs.









4. Errors and Problems

4.1 BCS errors

  A BCS error was found and recovered.

  Found at:             Recovery at:
  (Wed.)  940209-0928    (Thu.) 940210-0515  

4.2 SXT errors

  Two SXT errors were found and recovered.

  Found at:             Recovery at:        Error:
  (Tue.)  940208-0274    Same pass           Bit map error
  (Wed.)  940209-0514   Same pass           Bit map error

4.3 Level Down in S & X bands

  In the 2nd pass on Feb-12 (940212-0516), power level of
  the S-band and the X-band suddenly dropped down.
  Part of reproducing data (about 10%) was lost due
  to this accident. And BCS calibration on this pass was not complete
  The cause is now on investigation.

5. DSN communication

5.1 DPSE cancellations

  The following passes have been cancelled due to support for a DSPSE maneuver.

                   DOY/BOT   EOT   ORBIT
           DSS 66  046/1653  1705  3921
           DSS 66  046/1836  1847  3922
           DSS 16  046/2318  329   3925
           DSS 16  047/0102  0113  3926
           DSS 16  047/0246  0256  3927


5.2 DSN Data Delay

   All the data until Feb. 5 is arrived to ISAS.

6. Hikitsugi

   The new week's tohban should check for FAXes and e-mails
   to see if there is no more real-time cancellations by DSN.

   The next tohbans in week 07 are
      * SSOC    Sawa, Hudson
      * KSC     Yuda, Miyashita