SSOC Tohban's Report for Week 04 (18-Jan-99 -- 24-Jan-99) SSOC : H. Hudson, M. Takahashi KSC : K.Kumagai, H. Ishizaki 0. Meeting Attendance Y. Ogawara, T. Watanabe, A.Sterling, D.McKenzie, J. Khan, G. Slater M. Sawa, M. Takahashi -------------------------------------------------------------- 1. Solar Activity The solar activity was high, and GOES level was about C1. 3 M-class flares and Many C-class flares occurred. -------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded in week 04. ===================================================== UT Time Pass Table ID ===================================================== 18-JAN-99 16:26 2 990118 P2 ARS1 STD 19-JAN-99 14:59 2 990119 P2 ARS1 DARKCAL 20-JAN-99 15:15 2 990120 P2 ARS1 STD 21-JAN-99 17:15 4 990121 P1 ARS1 DIFF 22-JAN-99 14:05 2 990122 P2 ARS1 STD 23-JAN-99 12:38 2 990123 P2 ARS1 STD ===================================================== 2.2 STT Timer setting The STT timer was set during pass 1 on 19-Jan-99 (Tuesday UT). The next timer setting should be done on 25-Jan-99 (Monday UT). -------------------------------------------------------------- 3. Errors and Problems 3.1 BCS Errors None 3.2 SXT Errors Filter Soft error was found in 21-Jan pass #1 and cleared by YOBI-C on pass #2. Because of this error, SXT table upload (990121 P1 ARS1 DIFF) was postponed to pass #4. Bit Map error was found in 23-Jan Pass #1 and clearerd by YOBI-C on the same pass. 3.3 BDR Anomalies None 3.4 NASA Tracking Stations Retransmissions of the DSS-61 (new Madrid) files from December were requested, now that the ISAS gateway can handle them. The data arrived and reformatting is proceeding apace. 3.5 KSC S-3500 computer When Fujitsu engineers checked hard disks in the S-3500 computer on 19-Jan, they found that a hard disk unit had bad block. The replacement was finished for Friday afternoon, Jan. 22. -------------------------------------------------------------- 4. Special Operations HXT calibrations were performed 21-Jan, pass #2, #3, and 22-Jan. -------------------------------------------------------------- 5. NASA Station Scheduling 5.1 Contact pass cancels/adds The following DSN/NASA passes were added/deleted: =================================================================== DSN/NASA Schedule Week Schedule Changes =================================================================== Final 05 13 passes deleted by SSOC Strawman 06 77 passes deleted by SSOC Preliminary 06 1 passes deleted by SSOC Strawman 07 57 passes deleted by SSOC =================================================================== 5.2 Data Transmission from NASA Ground Stations -(Refer to /home/flare1/yohkoh/dsn_corrupt/99_02)-------------- *340 66 2103 not received Requested 15 Dec no response Requested 18 Dec no response Requested 22 Dec no response Requested 25 Dec Requested 13 Jan Closed/ correct data(21-Jan) *340 66 2244 not received Requested 15 Dec no response Requested 18 Dec no response Requested 22 Dec no response Requested 25 Dec Requested 13 Jan Closed/ correct data(21-Jan) 011 76 0819 100% corrupted tape Requested 13 Jan not received tape Requested 19 Jan Closed/ correct data(20-Jan) 016 16 1112 10% corrupted -------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In week 05, we gave 2 contacts to ASCA and 3 contacts to HALCA. -------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for week 05 SSOC: Shinohara, Sterling KSC: Kumagai, Hori 7.2 STT timer setting The next timer setting should be on Monday, 25-Jan-99 (UT). -------------------------------------------------------------- 7.3 Holiday Schedule The holiday in week 05 will be on Sunday, 02-Feb (JST). ----------------------------------------------------------- 7.4 Manual and Checksheet A new version of the English Tohban Manual was generated during week 98_36, along with a corresponding new Tohban Checksheet. The new (and all future) Tohbans are requested to note any changes or mistakes in the manual, and to notify A. Sterling of any changes. If the changes involve the DSN procedures or the ~yohkoh/wallops/README file, Hugh Hudson san should also be notified. Current Version Yohkoh Tohban Duties Manual Rev. 4-Sep-98, A. Sterling README (Manual for Wallops/DSN Operations) Ver.5.2 28-Sep-98, H. Hudson The Japanese SSOC Tohban Manual was also modified on 23-Nov-98 by Ishii and Ichimoto. ---------------------------------------------------------------- 7.5 Some Problems in OP_FIRST_GUESS - NASA tracking passes Corrective action - the problem described in 8.3 below has been patched up as of 22-Jan-98 by debugging DSN_INPUT.PRO. It works at present, but the same problem may recur - tohbans should be aware that they must always check the NASA tracking pass list in the OP_FIRST_GUESS version. - Maximum Elevation Owing to a difference in the supposed Yohkoh maximum elevation between command sheet (78.6 degree) and weekly satellite schedule (82.5 degree or 80.1 degree in AOSLOS), 20m antenna at KSC had to be rotated suddenly in the second pass on Dec. 4 (981204-0929). As a result, a part of data was lost during the rotation. Tohbans should use parameters written in the weekly satellite schedule made by NASDA, which are the most reliable. ---------------------------------------------------------------- 7.6 DSN Santiago Station DSN Santiago Station(#74) has been not available since 1 Oct. 1998. We get strawman listings and are trying to confirm that these are really to be ignored. The policy may switch. (HSH, 22-Jan-98) ---------------------------------------------------------------- 7.7 DSN Pass Additions (from week48_98 report) Yohkoh loses DSN passes as follows: 1) Canceled due to conflicts with ASCA 2) Canceled because Santiago is unavailable 3) Canceled by the SSOC tohbans 4) Deleted by DSN The tohbans could compare the STRAWMAN, PRELIMINARY and FINAL schedules for a given week to see if some of the passes lost by case (4) could be replaced by ones from case (3). This means that it might be possible to request pass additions for the PRELIMINARY and FINAL week schedules from among the requested STRAWMAN cancellations (case (3)). The routine to use is ADD_DSN: e.g., IDL> add_dsn, 49 Decide on the complete list of passes to be added and select them like cancel_dsn. Then ftp and email the appropriate file. 7.8 Wallops pass conflicts between ASCA and Yohkoh. We have determined that the Wallops staff can resolve these conflicts. It is possible (and likely) that Wallops can handle both satellites simultaneously (HSH, w04). ---------------------------------------------------------------------------- 8. Action Items 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. PRINT_OGALL still does not work well. Hudson will fix it. ---------------------------------------------------------------- 8.3 Week-37-98-AI??-1 / "Possible OP_FIRST_GUESS Problem." / ?? / status ?? CLOSED 22-Jan-99 (HSH) --- Quote from W37-98 SSOC Report --- OP_FIRST_GUESS failed to pick up a couple of passes from the solass.w37 DSN schedule last week. Here is an example: . . 251 2159 2224 2238 2248 DSS-76 SOL R TKG PASS 8036 xxxxxx- xxx *---------- *WED 09 Sep *---------- 252 2342 0007 0020 0030 DSS-76 SOL R TKG PASS 8037 xxxxxx- xxx 252 0125 0150 0201 0211 DSS-76 SOL R TKG PASS 8038 xxxxxx- xxx 252 1852 1917 1929 1939 DSS-76 SOL R TKG PASS 8049 xxxxxx- xxx In this case, the missed pass was the one beginning at 0007. The problem seems to be that the DSN START time and the BOT times are for different DOY dates. We edited the solass.w37 file so that this line read: 251 2342 0007 0020 0030 DSS-76 SOL R TKG PASS 8037 xxxxxx- xxx OP_FIRST_GUESS then was able to pick up this pass. The other pass that OP_FIRST_GUESS missed had a similar form and was handled in the same way. We notified Jim Lemen of this problem. He hopes to look into this problem over the next couple of months. (We wonder if this problem has occurred in the past??) In the meantime, the tohbans will have to be on the lookout for this sort of problem. ---------------------------------------------------------------- 8.4 Week-48-98 / DSN Pass Additions Procedure / Sterling / OPEN Sterling-san will contact Ogawara-san and Lemen-san to determine a procedure acceptable to DSN to be used for DSN Planning (check policy regarding Wallops passes) and Pass Addition Requests. ---------------------------------------------------------------- === END ===