SSOC Tohban Report for Week 45 (01-Nov-99 -- 07-Nov-99) SSOC: H. Nakajima, R. Canfield KSC: T. Shimizu, M. Yamaguchi 0. Meeting Attendance Ogawara, Hudson, Sawa, Sakao, Watanabe, Canfield, McKenzie, Khan, Kozu, Shibasaki ------------------------------------------------------------------------------- 1. Solar Activity Solar activity was moderate this week. The largest flare was M3.0 on 5-nov-99. Only 29 flares ocurred at level C and above: 27 C, 2 M, 0 X. ------------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded during week 44: ================================================================ JST Day UT Start Time Pass Table ID ================================================================ Monday 31-OCT-99 22:05 1 991031 P1 ARS2 DIFF+J104 Tuesday 01-NOV-99 20:37 1 991101 P1 ARS1 DARKCAL Wednesday 02-NOV-99 22:32 2 991102 P2 ARS0 STD+IL Wednesday 03-NOV-99 01:57 4 991102 P4 ARS1 STD Thursday 03-NOV-99 21:03 1 991103 P1 ARS0 STD+IL Thursday 04-NOV-99 00:27 3 991103 P3 ARS1 STD Friday 04-NOV-99 21:16 2 991104 P2 ARS1 STD Saturday 05-NOV-99 19:47 1 991105 P1 ARS1 STD ================================================================ 2.2 STT Timer setting STT timer was set during Pass 4 on 02-Nov-99 (UT). ------------------------------------------------------------------------------- 3. Special Operations 3.1 Satellite Pointing update A normal pointing update (ROG 032(Dec)) was carried out at Pass 4 on 03-Nov-99 (UT). ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 BCS Errors: None 4.2 SXT Errors: None ------------------------------------------------------------------------------- 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 45 4 Cancellations by SSOC Final 46 8 Cancellations by SSOC Preliminary 47 5 Cancellation by SSOC Strawman 48 80 Cancellations by SSOC =========================================================================== 5.2 Data Transmission from NASA Ground Stations ----(Copy of /home/flare1/yohkoh/dsn_corrupt/99_45)---- 293 80 1652 not received requested 26-Oct no response requested 29-Oct Closed/ correct data 293 80 1833 not received requested 26-Oct no response requested 29-Oct Closed/ correct data 293 80 2015 not received requested 26-Oct no response requested 29-Oct Closed/ correct data 293 80 2158 not received requested 26-Oct no response requested 29-Oct Closed/ correct data 293 80 2341 not received requested 26-Oct no response requested 29-Oct Closed/ correct data 295 46 1313 missing data requested 02-Nov same data requested 04-Nov Closed/ same data 300 46 1054 missing data requested 02-Nov same data requested 04-Nov Closed/ same data 301 76 2019 missing data requested 02-Nov Closed/ correct data 293 80 2341 not received requested 26-Oct no response requested 29-Oct Closed/ correct data 295 46 1313 missing data requested 02-Nov same data requested 04-Nov Closed/ same data 300 46 1054 missing data requested 02-Nov same data requested 04-Nov Closed/ same data 301 76 2019 missing data requested 02-Nov corrupted tape requested 04-Nov DOY-295 C46 1313 : 17749 blocks The data was short because the dump was already on at AOS. DOY-300 C46 1054 : 17785 blocks The data was short because the pass enterd a key hole during the support. ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In Week 45, 15 KSC contacts were lost, 11 to ASCA and 5 to HALCA In Week 46, 16 KSC contacts will be lost, 11 to ASCA and 5 to HALCA ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for Week 46 SSOC: H. Kozu, K Shibasaki KSC: T. Morimoto, M. Yamaguchi 7.2 STT Timer Setting The next STT TIMER SET is due on Tuesday, 9-Nov-99 (UT). 7.3 Holiday Schedule Next Yohkoh holiday will be Sunday, 14-Nov-99 (JST). 7.4 OP_FIRST_GUESS Problem OP_FIRST_GUESS printed "Night" instead of "Day" (as it should have printed) on pass sheets for 1999/11/02 Pass 4 and 1999/11/05 Pass 5. 7.5 OP_FIRST_GUESS Problem During the preparation of the 991104-1443 OP, OP_FIRST_GUESS inserted a QUIET RATE HIGH command during an SAA passage at a time when more than 20 minutes of daylight remained. The maximum duration of QUIET RATE HIGH mode during an SAA in daylight should be 10 minutes. 7.6 OP_FIRST_GUESS Problem During the preparation of the 991104-1443 OP, OP_FIRST_GUESS crashed with the message "OP_START_END: problem with detection of LOS/AOS/DSN Repro events", unless one DSN pass at 1999/11/05 20:31:40 was deleted. This pass was therefore manually inserted into the OP using the OP editor. This problem could be solved by changing OP_FIRST_GUESS options: choose optimization 1 rather than 2. 7.7 Wallops Low-Elevation Pass Downlink Check After reassurances from Watanabe san, the tohbans scheduled a Wallops pass with only 6.5 degree maximum elevation. Seko san confirmed that the date were received OK. ------------------------------------------------------------------------------- 8. Unchanged Hikitsugi Items from Last Week 8.1 Weekend Terminators If possible, please schedule terminator opportunities on any weekend table (i.e., if room permits). 8.2 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. 8.3 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" 8.4 Software Problems pr_gev with /hc keyword produces a temporary output file but does not print it at the printer. 8.5 OP_FIRST_GUESS problem (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. 8.6 Keeping Wallops contacts (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. 8.7 OP_FIRST_GUESS problem (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. 8.8 Tohban Manual (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). 8.9 A New Antenna System in Wallops (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. === END ===