SSOC Tohban's Report for Week 07 (9 Feb 1998 - 15 Feb 1998) SSOC : M. Takahashi KSC : M. Shimojo(-11) & S. Akiyama S. Yashiro (11,14) 0. Meeting Attendance Y.Ogawara, Te. Watanabe, H. Hudson, D. Mckenzie, A. Sterling, H. Hara, M. Takahashi 1. Solar Activity Solar activity is higher than last week. A few C-class flares occurred. GOES back ground level is higher than B. 2. Standard Operation 2.1 SXT Table Uploads The following SXT tables were uploaded last week. ---------------------------------------------------------------- Pass ID Pass Table ID ================================================================ 980209-1135 3 980209 P2 ARS1 STD * Shift to P3 for Halca 980210-0930 4 980210 P4 ARS1 DARKCAL 980211-0517 1 980211 P1 ARS0 CDS-AR+LON 980211-0827 4 980211 P4 ARS1 DIF+LONG 980212-0721 2 980212 P2 ARS0 CDS-AR+LON 980212-0928 4 980212 P4 ARS1 STD+LONG 980213-0213 2 980213 P2 ARS1 STD 980214-0214 2 980214 P2 ARS1 STD ---------------------------------------------------------------- 2.2 STT timer setting STT timer was set two times in this week, at Pass2 (980210-0723) on February 10 and Pass4 (980213-0825) on February 13, because STT-timer- setting software showed that the timer set in 980210-0723 was expired on February 13. 2.3 Calibration 2.3.1 HXA Gain Adjustment and Calibration HXA Gain Adjustment and Calibration were done at the following passes. ---------------------------------------- Pass ID Pass ======================================== 980212-0928 4 HXA CAL (+ Gain Change[fault] see 3.6) 980213-1134 4 HXA CAL 980213-1238 5 HXA CAL + Gain Change[Success] ---------------------------------------- 3. Errors and Problems 3.1 SXT Errors and Problems BIT MAP ERR was found at Pass4 (980210-0930) on February 10. SXT was recovered with Yobi-C command at the same pass. 3.2 BCS Error On February 9, BCS Chief Observer found a BCS error which is not shown in QL-system. BCS Recovery was executed at Pass4, 980209-0929. 3.3 S3500 Trouble After Pass 1 (980209-0619) on February 9, S3500 was reseted and then recovered. Now there is no problem for operation. 3.4 Command Answer Back Trouble The answer-back for some commands was wrong in February 2 - 5. Hara san, NEC and Fujitsu engineers conclude that the answer-back wrong is because the transmitted commands were not verified by MS computer in February 2 - 5 before the maintenance (February 6) of MS computer. After the maintenance, answer-back error has never occurred. Now Yohkoh operation is no problem. 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. 3.6 BC trouble In HXT Gain change (980212-0928), SSOC Tohban (M.T.) wrote "BC E4 D9" in command sheet. As a result, I made KSC execute "DP BC E4 D9" instead of "HXT BC E4 D9". Though I hurried to check the meaning of "DP BC E4 D9", the BC means blank (i.e. no operation). In order to confirm safety state of Yohkoh, I got Fujitsu engineer to check the present status of Yohkoh, and then he concluded that Yohkoh had no problem. After this trouble there is no problem for Yohkoh operation. I (M.T.) am sorry for my caress mistake. 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 W07 1 passes cancelled by SSOC Final W08 2 pass cancelled by SSOC Preliminary W09 6 pass cancelled by SSOC Preliminary W09 1 pass added by SSOC Strawman W10 44 passes cancelled by SSOC ------------------------------------------------------------------- 5.2 Data Transmission from DSN 022 76 0747 corrupted tape Requested 28 Jan Closed / same data 024 76 0642 corrupted tape Requested 02 Feb Closed / same data 024 76 0822 corrupted tape Requested 02 Feb. Closed / same data 025 76 0658 corrupted tape Requested 06 Feb Closed / correct data 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 76 0758 corrupted tape Requested 06 Feb 037 16 1026 not received Requested 12 Feb 039 76 0603 not received Reference : /home/flare1/yohkoh/dsn_corrupt/98_07 made by Seko-san 6. KSC Pass Conflicts and Schedule In week 7, 980209-0722 and 980212-0617 were lost due to HALCA operation. 7. Hikitsugi Items 7.1 Tohbans for W07 SSOC : K. Akita & J. Sato KSC : S.Akiyama (-20) & K. Nakakubo (17-) 7.2 STT timer setting STT timer will be expired on February 20 (Fri) 1998 (UT). Because the timer setting has usually be done on Tuesday, I think that next setting should be done on February 17 (Tue). 7.3 Holiday Schedule The next holiday will be on February 22, Sunday, 1998 (UT). ===================================================================== || The following is 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 chief 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 -----------------------------------------------------------