SSOC Tohban Report for Week 44 (25-Oct-99 -- 31-Oct-99) SSOC: T. Takahashi, S. Akiyama KSC: M. Shimojo, T. Shimizu 0. Meeting Attendance D. McKenzie, T. Sakao, T. Takanashi, Te. Watanabe S. Akiyama, J. Khan, T. Kosugi, D. Canfield, H. Nakagima ------------------------------------------------------------------------------- 1. Solar Activity The solar activity was high in the middle of the week . 7 M-class and many C-class flares occurred. ------------------------------------------------------------------------------- 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 25-OCT-99 05:05 3 991025 P3 ARS2 FLARE SPEC Tuesday 26-OCT-99 00:11 1 991026 P1 ARS2 DARK+FLARE Wednesday 27-OCT-99 02:06 2 991027 P2 ARS0 FLARE SPEC Wednesday 27-OCT-99 05:31 4 991027 P4 ARS2 FLARE SPEC Thursday 27-OCT-99 22:55 1 991027 P1 ARS0 FLARE SPEC Thursday 28-OCT-99 02:19 3 991027 P3 ARS2 FLARE SPEC Friday 29-OCT-99 02:32 3 991029 P3 ARS2 FLARE SPEC Saturday 29-OCT-99 21:40 1 991029 P1 ARS0 FLARE SPEC Saturday 30-OCT-99 01:03 3 991029 P3 ARS1 STD ================================================================ 2.2 STT Timer setting STT timer was set during Pass 1 of 26-Oct-99 (UT). ------------------------------------------------------------------------------- 3. Special Operations 3.1 BCS Calibration BCS stim calibration was carried out in pass 4 of 26-Oct (991026-0411). After this pass (26-Oct 07:27) BCS source calibration was carried out. ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 BCS Errors: None 4.2 SXT Errors: An SXT bit map error was found in Pass 1 of 25-Oct (991025-0104) and recovered in same pass. ------------------------------------------------------------------------------- 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 8 Cancellations by SSOC Preliminary 46 1 Cancellation by SSOC Strawman 47 46 Cancellations by SSOC =========================================================================== 5.2 Data Transmission from NASA Ground Stations ----(Copy of /home/flare1/yohkoh/dsn_corrupt/99_44)---- 285 76 2155 corrupted tape requested 20-Oct no response tape requested 22-Oct Closed/ same data 289 80 2105 corrupted tape requested 20-Oct no response tape requested 22-Oct Closed/ same data 291 80 0044 corrupted tape requested 20-Oct no response tape requested 22-Oct Closed/ same data 293 80 1652 not received requested 26-Oct no response requested 29-Oct 293 80 1833 not received requested 26-Oct no response requested 29-Oct 293 80 2015 not received requested 26-Oct no response requested 29-Oct 293 80 2158 not received requested 26-Oct no response requested 29-Oct 293 80 2341 not received requested 26-Oct no response requested 29-Oct ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In Week 44, 13 KSC contacts were lost, 12 to ASCA and 1 to Akebono. In Week 45, 15 KSC contacts will be lost, 11 to ASCA, 3 to Akebono and 1 to HALCA. ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for Week 45 SSOC: H. Nakajima, D. Canfield KSC: T. Shimizu, M. Yamaguchi 7.2 STT Timer Setting The next STT TIMER SET is due on Tuesday, 2-Nov-99 (UT). 7.3 Holiday Schedule Next Yohkoh holiday will be Sunday, 7-Nov-99 (JST). 7.4 A New Antenna System in Wallops This is not a new topic. 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. 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). === END ===