SSOC Tohban Report for Week 06 (31-Jan-2000 to 06-Feb-2000) SSOC: S. Yashiro, Y. Suematsu KSC: M. Hata, S. Akiyama 0. Meeting Attendees Kosugi, Hudson, Khan, Sawa, Matsuzaki, McKenzie, Suematsu, Yashiro, Watanabe, Ishizaki ------------------------------------------------------------------------------- 1. Solar Activity Solar activity was gradually increasing during the last week. The GOES soft X-ray background was at mid-B level, indicating gradual increase. X1.2 flare occured at 5-feb 19:28, and M3.0 flare occured at 4-feb 09:20. There were 1 M-class flare, and several C-class flares. ------------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded: ================================================================ JST Day UT Start Time Pass Table ID ================================================================ Monday 31-JAN-00 03:53 2 000131 P2 ARS1 DIFF Tuesday 01-FEB-00 04:04 3 000201 P3 ARS1 DARKCAL Wednesday 02-FEB-00 05:59 4 000202 P4 ARS1 STD Friday 03-FEB-00 23:32 1 000203 P1 ARS1 STD Sunday AM 5-Feb-00 23:54 2 000205 P2 ARS1 DIFF Sunday PM 6-Feb-00 03:20 4 000205 P4 ARS1 DARKCAL ================================================================ 2.2 STT Timer setting STT timer was re-set and started during Pass 3, 000201-0309, on 01-Feb-2000 (UT). ------------------------------------------------------------------------------- 3. Special Operations No special operation. ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 BCS Errors: The memory check summ error was found at the pass 1 (000203-1548) of 4 Feb. and was recovered in the same pass. 4.2 SXT Errors: None 4.3 DP Errors: DP"8A" error occurred during the pass 1 (000201-0102) of Feb 1 and was recovered at the pass 3 (000201-0309) of the same day. 4.4 Solar soft Yohkoh softwares (a) OP_FIRST_GUESS.PRO A minor Y2K problem was found in the printed command sheet. '19' characters for '19XX' appeared in the top area of command sheet. This was fixed by Yashiro-san. (b) Spam attack on flare1 The computer, flare1, which is used for operations, was hacked into on Wed 26-Jan and Thur 27-Jan and used for third-party relay of spam to many, many users. On Thur morning sendmail was switched off on flare1. On Monday, Jan 31, Shimojo-san updated the sendmail and recovered the yohkoh e-mail system as before. ------------------------------------------------------------------------------- 5. NASA Station Scheduling 5.1 Contact pass cancellations/additions The following DSN/NASA passes were added/deleted: =========================================================================== DSN/NASA Schedule Week Schedule Changes =========================================================================== Final 06 1 Additions Requested: 0 Given; 0 Cancelations Final 07 0 Additions Requested: 0 Given; 0 Cancelations Preliminary 08 0 Additions Requested: 0 Given; 1 Cancelations Strawman 09 66 Cancelations: 16 by Seko-san, 50 by SSOC =========================================================================== 5.2 Data Transmission from NASA Ground Stations ----(to be copied from /home/flare1/yohkoh/dsn_corrupt/2000/00_06)---- 030 76 2008 missing requested 01-Feb Closed/ correct data 030 82 2139 missing requested 01-Feb Closed/ correct data 029 76 1622 not received requested 02-Feb Closed/ correct data 029 82 1805 not received requested 02-Feb 029 82 2128 not received requested 02-Feb DOY-028 W82 2259 - 2308 12859 blocks : Excessive data dropouts due to erratic autotrack. Unable to correct with time bias or angle bias. ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In Week 06, we lost 12 KSC contacts: Akebono: 1, ASCA: 7, ASTRO-E: 4 In Week 07, we will lose 20 KSC contacts: Halca: 1, ASCA: 4, ASTRO-E: 15 ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for next Week SSOC: H. Ishizaki, Te. Watanabe KSC: S. Akiyama, T. Yokoyama 7.2 STT Timer Setting The next STT TIMER SET is due on Monday '07-Feb-2000 (UT)'. 7.3 OP OP for 07 Feb (today: starting at 1048) has already been prepared and transferred by W06 SSOC tobans. This is a spetial OP like the year-end holiday's OP. 7.4 Conflict meeting The meeting will be held from 17 hours of Tuesday. 7.5 ASTRO-E launch operation at KSC ASTRO-E will be launched on 8th February. Please be careful with operations around about this day. 7.6 Holiday Schedule Next Yohkoh holiday will be Sunday, 13-Feb-00 (JST). 7.7 DSN Pass Additions 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 should compare the STRAWMAN, PRELIMINARY and FINAL schedules for each week to see if some of the passes lost by case (4) could be replaced by ones from case (3). This means it may be possible to request pass additions for the PRELIMINARY and FINAL week schedules from the (case (3)) STRAWMAN cancellations. 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. ------------------------------------------------------------------------------- 8. Unchanged Hikitsugi Items from Previous Weeks: 8.1 Elevation angle limit at Santiago (w49) Seko_san noticed two fault reports from Santiago (DSS-74) due to low elevation at the end of the pass: These were shown as max elevations of 11.1 degrees (323/1322) and 10.7 degrees (315/1645) in our database. Accordingly, after consultation with Watanabe-san, we suggest increasing the threshold (for this station only) to 13.5 degrees maximum elevation. 8.2 Weekend Terminators If possible, please schedule terminator opportunities on any weekend table (i.e., if room permits). 8.3 Keeping Santiago contacts Currently, ASCA conflicts cause the loss of about 10 KSC contacts per week. We do not know which contacts Yohkoh will lose until the weekly meeting. Santiago contacts occur on the same orbits as KSC contacts. Therefore, please keep as many Santiago contacts as possible in the DSN Strawman and Preliminary Forecasts. 8.4 OP and Real-time Command Glossary We need a shorthand glossary for common OP and command-sheet commands. This already exists pretty much in the Sakao-san manual in Japanese, and the Week 26 tohbans started accumulating an English version on "yohkoh.glossary" 8.5 Software Problems pr_gev with /hc keyword produces a temporary output file but does not print it at the printer. 8.6 OP_FIRST_GUESS problem (1999-w38) In a situation with two KSC cancellations on each of two days (a rare condition) the BDR optimization feature of OP_FIRST_GUESS crashed. After experimentation, we found that it ran OK without the final cancellation request (two the first day, but just the first one on the second day). The second one then had to be removed manually. Records of the problem were forwarded to Lemen-san, but no answer had arrived at the time of writing. 8.7 Keeping Wallops contacts (1999-w42) This is not a new policy, but to emphasize (paraphrased from e-mail from Hugh Hudson): We should keep all valid Wallops passes, independent of day/night status, in order to maximize our Wallops use and minimize our DSN use. NASA won't give us many DSN passes anyway, so if we select a Goldstone pass in preference to a Wallops one, we'll normally just lose both. Another reason is that CANCEL_DSN software needs some repair, since it seems to replace the DSS identifier WGS with 0. This is likely to cause confusion, but of course if we don't cancel Wallops passes we won't have this problem often. 8.8 OP_FIRST_GUESS problem (1999-w42) In one instance, op_first_guess produced a nested RB HV RDCT ON/ RB HV RDCT OFF sequence (i.e. ON-ON-OFF-OFF). This problem is easily spotted, and corrected by deleting the second ON command and the first OFF command manually. The bug has been reported to J. Lemen. 8.9 Tohban Manual (1999-w42) The English-language version of the Tohban Manual has been updated recently and should be considered authoritative. The corresponding checksheet is also new (August 1999). 8.10 A New Antenna System in Wallops (1999-w43) Since October 1, a new antenna GN-WGS is used instead of a 9m antenna DSS-76 in Wallops station. SSOC tohbans should not be surprised at the unfamiliar antenna code GN-WGS in the DSN schedules. This new code GN-WGS is replaced with DSS-80 in solass.w## and solsf.w## by the program "fmt_wallops". But some programs for the strawman scheduling replace it with DSS-0. 8.11 OP_FIRST_GUESS Problem (1999-w46) OP_FIRST_GUESS printed "Night" instead of "Day" (as it should have printed) on pass sheets for 1999/11/15 Pass 5(991115-1341). 8.12 OP_FIRST_GUESS Problem (1999-w46) During the preparation of the 991115-1031 OP, OP_FIRST_GUESS inserted a QUIET RATE HIGH command during an SAA passage at a time when about 20 minutes of daylight remained. The maximum duration of QUIET RATE HIGH mode during an SAA in daylight should be 10 minutes. 8.13 OP_FIRST_GUESS Problem (1999-w46) During the preparation of 991109-1238 OP,991110-1135 OP and 991111-1032 OP OP_FIRST_GUESS crashed with the message "OP_START_END: problem with detection of LOS/AOS/DSN Repro events". This problem was solved by changing OP_FIRST_GUESS options: choose optimization 1 rather than 2. All these 3 problems above (item 8.10, 8.11 and 8.12) occurred also on week 45 in 1999. === END ===