SSOC Tohban Report for Week 52 (20-Dec-99 to 26-Dec-99) SSOC: Kano, (Watanabe) KSC: Kobayashi, Ichimoto 0. Meeting Attendance H.Hara, N.Nitta, M.Sawa, T.Watanabe ------------------------------------------------------------------------------- 1. Solar Activity Solar Activity keeps almost constant around C-level. There were three M-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 PM 20-DEC-99 03:44 4 991220 P4 ARS1 DARK Tuesday AM 21-DEC-99 00:31 3 991220 P3 ARS1 DIFF Wednesday AM 21-DEC-99 21:07 1 991221 P1 ARS1 FG Thursday AM 22-DEC-99 21:30 2* 991222 P1 ARS2 FG Thursday AM 23-DEC-99 00:56 4 991222 P4 ARS2 FG Friday AM 23-DEC-99 23:26 3 991223 P3 ARS1 FG Saturday AM 24-DEC-99 23:38 3 991224 P3 ARS1 STD ================================================================ * KSC tohban postponed the SXT table whose ID was different from the one shown in the weekly plan, to confirm that it was a right table. 2.2 STT Timer setting STT timer was re-set during Pass 5, 991221-0308, on 21-Dec-99 (UT). ------------------------------------------------------------------------------- 3. Special Operations 3.1 Change of Normal Pointing We changed the pointing direction for normal pointing in pass-3 of 25-Dec by ROG-20(H). It was requested by SXT_CO. ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 BCS Errors: One BCS error was found in pass-3 of 25-Dec, and cleared in the next pass (pass-5). 4.2 SXT Errors: One BIT-MAP error was found in pass-1 of 20-Dec, and cleared in the same pass by Yobi-C. 4.3 S3500 printers at KSC: 4.3.1 Problem of Line Printer, which prints out AOSLOS sheets and QL-logs On Dec-23, the line printer of S3500 stopped with the code "37". However, it recovered the next day. Anyone at KSC does not know the cause of this problem so clearly. The engineer cannot come to KSC in this year. Therefore, we decided to do the followings. 1. KSC tohbans print out AOSLOS sheets not only for w53=w01 but also for w02, while the line printer works. 2. Shimojo-kun (a first KSC tohban in 2000) will take care of the line printer, if necessary. 4.3.2 Problem of Color Hardcopy Machine, which prints out AOSLOSGD The color hardcopy machine of S3500 seemed have a small trouble. However, it was fixed by Fujitsu KSC-operator. 4.4 OP_FIRST_GUESS problems: 4.4.1 OP_FIRST_GUESS skipped any Santiago contacts. Watanabe-san and Kano found the ORBIT_RAW files did not included the Santiago station since week 51. This is because Lemen san updated an older version of the ORBIT_RAW's program to fix y2k problems. Lemen san fixed this problem very quickly, and updated all ORBIT_RAW files. (The ORBIT_RAW files are the AOSLOS data used in workstations.) 4.4.2 OP_FIRST_GUESS printed "Night" instead of "Day" on pass sheets for Pass No. 991222-0102 and 991227-0001. This problem happened several times since 1999-w46 (See 8.11). We reported it to Lemen-san as a minor dug by e-mail. He'll try to look at that this week (w53=w01). 4.5 CONTACTS problems: The IDL program "contacts" creats KSC contact time list. It is used by Seko san, when she report the next week KSC schedule. It returns the wrong prediction for the KSC contacts after 07-Jan-2000 00:00UT. This problem was already reported to Sofware, and Slater san started to fix it. 4.6 OP transfer SSOC tohban (R.Kano) forgot to transfer OP for pass-1 of Wednesday until Wednesday morning. Therefore, OP write was postponed to the next pass (pass-3). The observation itself continuted properly, because the previous OP covered until pass-3. 4.7 ADS file remake The improved ADS was replaced: SOLARA.AADF.A9802. This new file contains a new data in the element T2100002 covering the attitude data during 8:55:19 to 13:12. ------------------------------------------------------------------------------- 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 52 1 Cancellation by SSOC Final 01 1 Cancellation by SSOC Preliminary 02 1 Cancellation by SSOC Strawman 03 68 Cancellations by SSOC =========================================================================== 5.2 Data Transmission from NASA Ground Stations ----(Copy of /home/flare1/yohkoh/dsn_corrupt/99_52)---- 333 74 1528 corrupted tape requested 02-Dec Closed/ correct data 338 82 2146 corrupted tape requested 10-Dec Closed/ correct data 353 46 1032 not received requested 21-Dec 354 46 1045 missing data requested 21-Dec 352 46 0840-0850 15365 block Dump came on late and was still on after LOS. ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In Week 52, 8 KSC contacts were lost, all for ASCA. In Week 01, 8 KSC contacts will be lost, 5 for ASCA and 3 for HALCA. In Week 02, 10 KSC contacts will be lost, 6 for ASCA and 4 for HALCA. ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for next Week SSOC: Te. Watanabe KSC: T. Kobayashi, K.Ichimoto 7.2 STT Timer Setting The next STT TIMER SET is due on Tuesday 28-Dec-99 (UT). 7.3 Holiday Schedule The 1999's operation will finish 08:08JST on Dec 30. The check of Y2K problems is scheduled 22:43JST on Jan 03. Then, the 2000's operation will start 22:54JST on Jan 04. 7.4 KSC conflict meeting There is no KSC conflict meeting in this week. The next KSC conflict meeting will be held at 13:30 on Jan 06. ------------------------------------------------------------------------------- 8. Unchanged Hikitsugi Items from Last Week 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 ===