SSOC Tohban's Report for Week 06 (2 Feb 1998 - 8 Feb 1998) SSOC : R.Kano(3-) & Te.Watanabe(2) KSC : T.Ishii & M.Shimojo 0. Meeting Attendance (in alphabetical order) H.Hara, H.Hudson, J.Khan, R.Kano, D.McKenzie, N.Nitta, Y.Ogawara,i M.Sawa, Te.Watanabe 1. Solar Activity Solar activity is low. A few B-class flares were detected with Yohkoh. 2. Standard Operation 2.1 SXT Table Uploads The following SXT tables were uploaded last week. ---------------------------------------------------------------- Pass ID Pass Table ID ================================================================ 980202-1135 4 980202 P4 ARS1 DARKCAL 980203-0929 2 980203 P2 ARS1 STD+DI 980204-0930 2 980204 P2 ARS1 DARKCAL 980206-0824 2 980206 P1 ARS0 JET 980206-1134 2 980206 P4 ARS1 STD ---------------------------------------------------------------- 2.2 STT timer setting STT timer was set at Pass2, 980203-0929, on February 3, 1998 (UT). 2.3 Calibration 2.3.1 HXT Calibration HXT Fine Gain Adjstment and Calibration was done at the following passes. ---------------------------------------- Pass ID Pass ======================================== 980202-0928 2 Fine Gain Adjustment 980202-1032 3 HXT CAL 980203-1032 3 HXT CAL 980203-1136 4 HXT CAL ---------------------------------------- 2.3.2 HXA Calibration HXA Calibration was done at the following passes. ---------------------------------------- Pass ID Pass ======================================== 980206-1031 3 HXA CAL 980206-1134 4 HXA CAL 980206-1238 5 HXA CAL ---------------------------------------- 3. Errors and Problems 3.1 SXT Errors and Problems BIT MAP ERR was found at Pass1 on February 5, 980205-0723. SXT was recovered with Yobi-C command at the same pass. 3.2 BCS Error On February 4, BCS Chief Observer (Sterling-san) found a BCS error which is not shown in QL-system. Then, BCS Recovery was executed at Pass1, 980204-0826. KSC tohban found another BCS error at Pass1 on February 6, 980206-0824. BCS was recovered at the next pass, 980206-0927. 3.3 S3500 Trouble In this week, S3500 sometimes stopped. Thus, KSC tohban sometimes use the main frame computer in Sagamihara for the QL-system, instead of S3500. 3.4 Command Answer Back Trouble Since February 3, the answer-back for some commands has been wrong. For example, when we execute the block command "DP BC '8C 05'(hex)", the command answer back is "CAMERA OFF(DC-8C)"! Now, Dr. Hara and NEC engineer are searching the cause of this trouble. The meeting with NEC engineer is held this afternoon. 3.5 FAX trouble We cannot send any FAX from B-toh to D-toh. This is not a hardware problem, because there is no trouble with the FAX from D-toh to B-toh and from NAOJ to D-toh. 4. Special Operation There was no special observation in this week. 5. DSN Communications 5.1 DSN Schedule Passes are deleted by DSN and SSOC Tohbans as follows. ------------------------------------------------------------------- DSN Schedule Week Deleted Passes =================================================================== Final W06 0 passes cancelled by SSOC Final W07 1 pass cancelled by SSOC Preliminary W08 1 pass cancelled by SSOC Strawman W09 63 passes cancelled by SSOC ------------------------------------------------------------------- 5.2 Data Transmission from DSN 022 76 0747 corrupted tape Requested 28 Jan 022 76 0928 corrupted tape Requested 28 Jan Closed/ same data 022 76 1111 corrupted tape Requested 28 Jan Closed/ same data 024 76 0642 corrupted tape Requested 02 Feb 024 76 0822 corrupted tape Requested 02 Feb. 025 76 0658 corrupted tape Requested 06 Feb 031 16 1201 corrupted tape Requested 06 Feb 031 16 1345 corrupted tape Requested 06 Feb 033 76 0922 corrupted tape Requested 06 Feb 034 34 0758 corrupted tape Requested 06 Feb ### DOY-29 S 1513 (WPS email)-- 82 Drops at los DOY-30 G 1326 (JPL FAX )-- No Data Dump DOY-31 G 0655 (JPL FAX )-- No Data Dump DOY-32 W 1047 (WPS email)-- Antenna masking at 104955-105035z Refference : /home/flare1/yohkoh/dsn_corrupt/98_06 made by Seko-san 6. KSC Pass Conflicts and Schedule In week 6, there was no conflict with other satelites. In week 7, 1 pass will be lost due to HALCA. 7. Hikitsugi Items 7.1 Tohbans for W07 SSOC : M.Takahashi KSC : M.Shimojo(-10) & S.Akiyama 7.2 STT timer setting STT timer setting is due on February 10, Tuesday, 1998 (UT). 7.3 Holiday Schedule The next holiday will be on February 15, Monday, 1998 (UT). ===================================================================== || The following is almost the same as the previous week's report. || ===================================================================== 7.4 DSN scheduling From this year, Wallops schedules DSN passes, instead of JPL. The system to communicate with Wallops is still under construction. For details, see "Temporary Manual" written by Hugh Hudson in the directory ~/wallops on flare20. 7.5 Bug in op_first_guess (Quoted from the previous week's report) SSOC tohbans should be aware of a bug in op_first_guess: "% OP_START_END: Problem with detection of LOS/AOS/DSN Repro Events" appears when we have close enough contacts (more than two downlinks in an orbit). We avoided the problem, when using op_first_guess, by responding to "Change any standard op_first_guess options?" by choosing yes, then in response to "Enter BDR optimization (1 or 2), by choosing 1. 7.6 Suggestion to DSN selection rule (Quoted from the previous week's report) --- mail from JPL --- I understand that you access RASM and choose the passes that are made available to you. We would like you to use the Wallops (WFF) passes as much as possible. In other words, if a pass from one of the DSN sites (Goldstone, Madrid or Canberra) can be substituted by a WFF pass, please use the WFF pass and delete the DSN pass, instead of vice versa. Please understand we are not asking you to give up any coverage but if the same coverage can be accomplished by using WFF instead of the DSN, we would like you to do so. (Albert Chang) 7.7 BDR trouble (See 'DP error' in "SSOC Tohban's Report for Week 02" in 1998.) A DP error (error code = 90 ->75) was found during the data dump at 980106-0411. 2 of 20 BDR blocks are not accessible. As a result, the capacity of BDR is at the moment nine tenth of the normal capacity. As far as we know this error has not been recovered yet. 7.8 E-mail communications (Quoted from the previous week's report) We rely upon e-mail more and more. For operations-related e-mail, it's hereby suggested that we make it a rule to ACKNOWLEDGE the receipt of any such e-mail message. This applies particularly among SSOC, SXT_CO, KSC and SXT_ST. 7.9 Long Range Schedule Arrangement (W49-1997) Since the launch of HALCA, the KSC tracking facilities have been running in operation nearly twenty four hours a day. No time has been available yet for maintenance this year. NEC and MELCO are planning to reserve a pair of two- week periods for maintenance with both of these two-week intervals occurring before the end of March 1998. The work requires six consecutive hours each day. Candidate periods; 17-31 of January and 16-31 of March, During these periods, we will perhaps lose one contact per day at KSC. Also, Planet-B will be launched next summer. In spite of the fact that Planet-B is a Japanese mission, it will be launched during summertime; its launch window starts July 4, 1998 for the mission to Mars. During the flight operation (lasting for the twenty six days before the launch window begins), the KSC 20-meter antenna system will be used. After the launch, Planet-B will be tracked by the USD 64m and the newly (to be) installed KSC 34m antenna. Tracking scheduling during the Planet-B flight operation interval will be negotiated among the five teams namely: AKEBONO, YOHKOH, ASCA, HALCA and Planet-B (in March, perhaps). Tetsuya WATANABE (NAOJ) 7.10 Off pointing (From SXT Chief Observer : Nitta-san) If no off-pointing is planed in the current week (see SXT cheif observer's report), there is no need for SSOC tohbans to ask SXT_CO whether or not offpoint should be added to the every day's command sheet. 8. Action Items (Same as last week's SSOC Report) 8.1 Further software development. Status CONTINUING. It would be greatly appreciated if the SSOC tohbans could recommend any software development that they think will save future tohbans time and which improves the reliability of their work. 8.2 Week-48-A/I-1 /Hudson/status AJAR. Hudson has fixed print_ogsel (Week 48). Upon editing the OG's, this command from IDL will print the edited OG item on the workstation printer in B-toh. PRINT_OGALL still does not work well. Hudson will fix it next. After the corrections are made, these procedures should be incorporated into the tohban manual. -- end of report -----------------------------------------------------------