SSOC Tohban's Report for Week 05 (26 Jan 1998 - 1 Feb 1998) SSOC : S.Kubo & A.Shiozawa KSC : K.Hori & K.Kobayashi 0. Meeting Attendance (in alphabetical order) T.Kosugi, Te.Watanabe, M.Sawa, A.Sterling, A.Shiozawa, S.Kubo 1. Solar Activity Solar activity is low. On the 26th, Jan, 1998 (UT), A C-class flare was observed by the SXT. The GOES observed 3 C-class events. One of them was that flare. 2. Standard Operation 2.1 SXT Table Uploads The following SXT tables were uploaded last week. ---------------------------------------------------------------- Pass ID Pass Table ID ================================================================ 980126-1445 4 980126 P4 ARS1 DARKCAL 980127-1135 2 980127 P2 ARS0 JET 980127-1342 4 980127 P4 ARS1 STD+DIF 980128-1239 3 980128 P3 ROCKET1 980129-1240 4 980129 P4 ARS0 ROCKET2 980130-1237 3 980130 P3 ARS0 ROCKET3 980130-1444 5 980130 P5 ARS0 ROCKET4 980131-1237 3 980131 P3 ARS1 STD ---------------------------------------------------------------- 2.2 STT timer setting STT timer was set at Pass2, 980127-1135, on the 27th, Jan, 1998 (UT). 2.3 HXT, BCS, and WBS calibration 2.3.1 HXT Calibration HXT Calibration was done at following passes. ------------------ Pass ID Pass ================== 980130-1237 3 980131-1134 2 980131-1237 3 ------------------ 2.3.2 BCS Calibration BCS Source Calibration : It was done about 20:54 on the 29th, Jan, 1998 (UT). BCS Stim Calibration : It was done at Pass2, 980129-1033, on the 29th, Jan, 1998 (UT) 3. Errors and Problems 3.1 SXT Errors and Problems The `Bit Map Error' was occured at Pass1, 980126-1134, on the 26th, Jan, 1998 (UT). This error was clarified at same pass. 4. Special Operation The rocket, S-520-22, was launched just 4:30 on the 31st, Jan, 1998 (UT), and observed simultaneously with the Yohkoh observation. 5. DSN Communications 5.1 DSN Schedule 5.1.1 Pass Cancellation Passes are deleted by DSN and SSOC Tohbans as follows. ------------------------------------------------------------------- DSN Schedule Week Deleted Passes =================================================================== Fainal W05 7 passes cancelled by SSOC Fainal W06 27 passes cancelled by SSOC Preliminary W07 8 passes cancelled by SSOC Strawman W08 60 passes cancelled by SSOC ------------------------------------------------------------------- 5.1.2 Pass Request 2 passes were added to suport the Rocket Observation by SXT C.O. 5.3 Data Transmission from DSN 354 76 0601 not received Requested 26 Dec. no response Requested 06 Jan. no response Requested 13 Jan no response Requested 16 Jan. no response Requested 22 Jan. Closed/ correct data 355 66 1856 corrupted tape Requested 06 Jan no response tape Requested 13 Jan no response tape Requested 16 Jan no response tape Requested 22 Jan Closed/ correct data 019 17 1658 corrupted tape Requested 22 Jan. Closed/ same data 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 Refference : /home/flare1/yohkoh/dsn_corrupt/98_05 made by Seko-san 6. KSC Pass Conflicts and Schedule 6.1 YOHKOH/ASCA/AKEBONO/HALCA/MAINTENANCE Pass Conflicts at KSC In week 5, 1 pass was lost due to HALCA, and 5 passes were lost due to antena maintenance. In week 6, there was no conflict with other satelites. 7. Hikitsugi Items 7.1 Status of Wallops handover (W48/97 - W03/98) The handover of scheduling took place for scheduling of passes this year. No noticeable shift (or error) of contact time predicition was found in the schedule any more, but as Wallops use different format for the table, software modification is required in the cancel_dsn and op_first_guess programmes. A software for automatic setup of schedule tables in a new wallops directory is wanted. Preliminary versions are being developed by Hugh Hudson-san. JPL maintain the files in RASM, as propmised. Their tables have so far been consistent with those from Wallops. 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. 7.2 Bug in op_first_guess --- (NOT REVISED) 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 respondin to "Change any standard op_first_guess options?" by choosing yes, then in response to "Enter BDR optimization (1 or 2), by choosing 1. 7.3 Tohbans for W06 SSOC : Te.Watanabe, M.Sawa and R.Kano KSC : T.Ishii & M.Shimojo 7.5 STT timer setting STT timer setting is due on the 3rd, Feb, Tuesday, 1998 (UT). 7.6 Holiday Schedule The next holiday will be on the 8th, February, Monday, 1998 (UT). 7.7 Password Change The passwords of 3 accounts, `s80670', `s80671' and `s88239' on the main frame shuold be changed, because of new month. 7.8 New Versions of English Tohban Manual and Tohban Checksheet The English language versions of the YOHKOH tohban manual and the tohban check sheet were updated on Nov 17. Among the changes are additions of discussions about the stt_plot and print_op routines. The check sheet has also been updated to reflect the page numbers in the new version of the manual. As always, tohbans are requested to write changes and indicate corrections in the manual so that they can be input the next time the manual is updated. A new preliminary Tohban Checksheet has been created to help with the changed procedures for Wallops communications. ----From W47 tohban reports------------------------------------------ In addition to the standard mainframe terminal, it is also possible to use the mainframe emulator on flare20 instead of the mainframe terminal for some situations: flare20% telnet mainf1 17 s88239 ex op(opognew) PF3 is {Esc}3 PF4 is {Esc}4 etc. -------------------------------------------------------------------------- 7.9 Sirius Data Nothing to report. 7.10 Suggestion to DSN selection rule: mail from JPL -- NOT REVISED HEREAFTER ----Quoted from the previous week's report ---------------------------- 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) ----------------------------------------------------------------------- 7.11 Loss of pass for Antenna maintenance From 15-January for about two weeks (see 7.4), maintenance works of the 20m antenna will take place during the operation gaps between ASCA and Yohkoh and holidays. To do that, the first pass of Yohkoh and the last pass of ASCA are sacrificed. 7.12 DP Error A DP error (error code = 90 ->75) was found during the data dump at 980106-0411. KSC tohban made a contact to FACOM/Nomura_san, and tried to clear the error at the following pass. However, Nomura_san analyzed the error and found that wrong information on the location of bad loops set the BAD flag in the block 4 and 5 of BDR and that this block was temporarily unusable. As a result, the capacity of BDR is at the moment nine tenth of the normal capacity. Nomura_san will consider the procedure of recovering the block rather carefully. He suggested two options and consider possibility of hardware failure. As far as we know this error has not been recovered yet and the BDR capacity remains at 90%. 7. Action Items (Same as last week's SSOC Report) 7.1 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. 7.2 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. 7.3 E-mail communications 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. 7.4 Long Range Schedule Arrangement (W49) Since the launch of HARUKA, 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 ose 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) 7.9 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. -- end of report -----------------------------------------------------------