SSOC Tohban Report for Week 05 (27 Jan -- 02 Feb 1997) SSOC : Yoshida & Shin KSC : Yokoyama & Saita Meeting Attendance : Watanabe, Hudson, Sawa, Nishino, Slater, Sakao, Nitta, Sterling, Khan, Shin, Ogawara 1. Solar Activity: The Sun was quiet during most of the week. 2. Standard Operation: 2.1 SXT Table Uploads: ------------------------------------------------------------ Pass ID Pass # Table ID ------------------------------------------------------------ Mon 970127-0207 4 970127 P4 ARS0 QT CORON Tue 970128-0104 4 970128 P4 ARS1 STD+LONG Wed Holiday Thu 970130-0102 4 970129 P4 ARS1 DARKCAL Thu 970130-0205 5 970129 P5 ARS1 DARKCAL Fri 970130-1547 3 970130 P3 ARS1 STD+DIFF Fri 970131-0103 4 970130 P5 ARS0 JET+DIFF Sun 970201-1342 2 970201 P2 ARS0 STD+LONG ------------------------------------------------------------ 2.1 STT timer setting: The STT timer was set during pass 2(970127-1445) on 27-Jan-97. The next timer set is planned for pass 2(970203-1343) on 03-Feb-97. 2.2 Terminators ----------------------------- Date Time S/C Pointing ----------------------------- 970130 080623 W5.12 N.023 970130 094327 Normal 970131 082400 W5.12 N.023 970201 070400 W5.12 N.023 ----------------------------- 3. Errors and Problems 3.1 SXT Errors and Problems: 3.1.1 SXT Table Upload Error The SXT table '970129 P4 ARS1 DARKCAL' was not uploaded correctly, because SXT CO made an error when generating a command sequence to load a table. See Appendix 1. 3.1.2 SXT Table Transfer Error We cannot send SXT tables from SSOC main frame 1 computer to MS satellite operation computer since 10h(JST) 01-Feb-1997. Now, Hara-san is checking for this problem. 3.2 BCS Errors and Problems: There were three BCS Errors last week. One found and recovered on pass 4 of Jan. 25 (Pass ID: 970125-0309), another found and recovered on pass 1 of Jan. 31 (Pass ID: 970130-1340), and another found and recovered on pass 3 of Feb. 02 (Pass ID: 970201-1445). 3.3 KSC Problems: 3.3.1 Network Problems: Yokoyama-san (KSC Tohban) modified some network configuration files on the flare5 workstation. This modification was reported to Yohkoh workstation managers. 3.3.2 Playback Data Problems: The time calibration software on S3500 computer didn't work correctly to the playback data taken at the passes: 970128-0001, 970128-0104, 970130-1340. See Appendix. 2. 3.4 Directory Problem on Yohkoh Workstations. The DSN schedule files for 1996 and 1997 were in the same directory. This was noticed by Seko-san and Paul-san. Lemen-san cleared up the /ydb/orbit_raw directory. 4. DSN Communications: 4.1 Cancellations for W05: 2 passes were canceled. 4.2 DSN Final schedule for W06: 8 passes were canceled. 4.4 DSN Preliminary schedule for W07: 10 passes were canceled. 4.5 DSN Strawman schedule for W08: 25 passes are canceled. 4.6 Data Transmission from DSN: 358 74 2210 not received Requested 07 Jan. no response Requested 13 Jan. Closed / No data. 014 16 2355 not received Requested 23 Jan. 018 16 2327 not received Requested 23 Jan 014 16 2355 not received Requested 23 Jan. Closed / No data 018 16 2327 not received Requested 23 Jan Closed / No data 020 46 1315 not received Requested 27 Jan. Closed / Correct data 5. YOHKOH/ASCA/AKEBONO/MUSES-B Pass Conflicts at KSC: 5.1 Canceled passes for W05-06 Week 05: 1 pass was canceled for ASCA and for Muses-B. Week 06: 1 pass will be canceled for Muses-B, and 3 passes for ASCA and 2 passes for AKEBONO. The launch operation for Muses-B will be done from 10-Feb to 11-Feb, so the next holidays are 10-Feb-1997 and 11-Feb-1997. 6. Special Operations: None. 7. Holiday Schedule: The next holidays are 10-Feb-1997 and 11-Feb-1997. 8. Hikitsugi Items: 8.1 Tohbans for W06 SSOC: Sterling & Nishino KSC: Saita & Tonooka 8.2 STT Timer setting The next timer set is planned for pass 2(970203-1343) on 03-Feb-97. 8.3 Sirius Data Nothing to report. 9. Action Items 9.1 Week-42-A/I-1 /Hudson, Lemen, Yoshida/ status: DEFERRED UNTIL JIM'S VISIT T. Yoshida has produced preliminary software to aid in optimizing the Yohkoh DP rate in OPs. The final implementation of Yoshida san's software will probably have to await the next visit to ISAS by Jim Lemen. Appendix 1. Nitta-san's mail ---------------------------------------------------------------- Date: Thu, 30 Jan 1997 13:42:53 +0900 From: SXT Chief Observer Message-Id: <9701300442.AA05006@isass0.solar.isas.ac.jp> To: hara@corona.mtk.nao.ac.jp, sxt_co@isass0.solar.isas.ac.jp, yohkoh@flare1.solar.isas.ac.jp, yohkoh@flare4.solar.isas.ac.jp Subject: error Status: RO I have made exactly the same error as senior COs did in the past, namely pressing "2" instead of "1" when generating a command sequence to load a table. As a result, the command sequence covered the entire table. At pass 4 on 30-JAN-97, when the table was to be sent, TBL WR did not seem to finish in time. The tobans had to issue the Yobi-A command to put SXT in a safe condition. At pass 5 the following procedure was carried out by the KSC tobans under the supervision of SXT Supertoban Hara san. 1. SXT CHK DIS (for reading the table) 2. SXT TBL RD (downlink of the content of the on-board table) 3. Generated (in SXTSPT) another command sequence that reflected table just downlinked. 4. Confirmed the arrival of the command seqeunce. 5. SXT TBL WR (writing to the satellite) 6. SXT TBL RE 7. Confirmed both on MS and in SXTSPT that the right table was written to the satellite. 8. SXT CTL AT 9. SXT operations resumed. No problem. I am sorry a simple mistake caused so much trouble. Sincerely, Nariaki Nitta ---------------------------------------------------------------- Appendix 2. Playback Data Problem ---------------------------------------------------------------- Date: Fri, 31 Jan 97 12:21:39 JST From: Yohkoh operator (KSC tohbans) Message-Id: <9701310321.AA04164@flare5.solar.isas.ac.jp> To: yohkoh@flare1.solar.isas.ac.jp Subject: jikokutuke Status: R ようこうSSOC当番様 報告内容： プレイバックデータ時刻付け異常 発生件数： 1997.1.31(JST)の運用終了時点で3件 発生パス： 1997.01.28(JST) Rev3 (970128-0001) 97-01-28 00:06-00:18(UT) Rev4 (970128-0104) 97-01-28 01:49-02:01(UT) 1997.01.31(JST) Rev1 (970130-1340) 97-01-30 19:54-20:06(UT) 症状の詳細： S3500で取得したプレイバックデータを時刻づけした際に、 実際の観測時刻とは異なる誤った時刻が付けられた可能性が高い。 症状は以下の通りである。 １）プレイバックデータに新しく付けられた時刻の最初と最後の時刻は、 S3500の'Solar-A Utility'プログラムの画面上でファイルごとに 表示されるがそれが明らかに誤った時刻を示している。 それぞれのデータごとについての詳細は下の表のとおり。時刻はすべてUT。 ダウンリンク時刻 予想される時刻 実際に付けられた時刻 97-1-28 00:06-00:18 97-1-27 22:35-00:05 97-1-26 22:33:44-00:08:04 97-1-28 01:49-02:01 97-1-28 00:18-01:49 97-1-23 20:21:57-21:56:41 97-1-30 19:54-20:06 97-1-30 15:25-19:54 97-1-24 18:08:36-19:41:35 ここで「予想される時刻」とは、それぞれのパスの直前のデータダウンリンク 時からパスの開始時刻までとしている。 ２）S3500からワークステーションへデータを転送してSXT画像チェックを行なうが、 上記の「予想される時刻」のデータがワークステーション上に生成されない。 いっぽう ３）リフォーマット電子メールによると、上記の「予想される時刻」の データがリフォーマットされた旨報告されている。 ４）なお、KSC富士通のA400側では「データに対する時刻付けは行なっておらず ダウンリンクデータのみをそのまま保存している」そうで比較検討は できなかった。 以上です。 1997.1.31 ようこうKSC当番 横山 央明 ----------------------------------------------------------------