SSOC Tohban Report for Week 12 (13-Mar-2000 to 19-Mar-2000) SSOC: Y. Katsukawa, T. Naito KSC: T. Watanabe, k. Kobayashi 0. Meeting Attendees ------------------------------------------------------------------------------- 1. Solar Activity GOES X-ray level stayed around C1 level this week. A large number of microflares were observed and there were 5 M class flares. The largest event was M2.1 flare with peak around 21:00 18-Mar-00. ------------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded: ====================================================================== JST Day UT Start Time Pass Table ID ====================================================================== Monday PM 13-Mar-00 08:34 3 000313 P3 ARS1 DARKCAL Tuesday PM 14-Mar-00 10:28 4 000314 P4 ARS2 DIFF+MM6 Wednesday PM 15-Mar-00 07:13 3 000315 P3 ARS2 MM6 Thursday PM 16-Mar-00 07:24 3 000316 P3 ARS0 MM6 Thursday PM 16-Mar-00 09:07 4 000316 P4 ARS2 MM6 Friday PM 17-Mar-00 09:17 4 000317 P4 ARS2 MM6 Saturday PM 18-Mar-00 07:45 4 000318 P4 ARS1 STD ====================================================================== 2.2 STT Timer setting STT timer was re-set and started during Pass 5, 000314-0825, on 14-Mar-2000 (UT). The next timer setting should be done on 21-Mar-2000 (Tuesday). ------------------------------------------------------------------------------- 3. Special Operations Co-ordinate observations with TRACE/CDS/GBOs for Max Millenium Campaign #6 was started from 14-Mar-00. For this campaign, a special table is used. The concerning SXT tables are denoted 'MM6' in the SXT tables shown above. ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 BCS Errors: No BCS error was reported from KSC. 4.2 SXT Errors: No SXT error was reported from KSC. ------------------------------------------------------------------------------- 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 13 0 Additions Requested: 0 Given: 1 Cancelation Preliminary 14 0 Additions Requested: 0 Given; 0 Cancelation Strawman 15 91 Cancelations: 15 by Seko-san, 74 by SSOC =========================================================================== We carelessly cancelled several DSN/NASA passes in Strawman Schedule including Sunday operation when KSC will have holiday. The detais are provided in 7.7. 5.2 Data Transmission from NASA Ground Stations ----(Copy from /home/flare1/yohkoh/dsn_corrupt/2000/00_12)---- 076 82 2156 corrupted tape requested 17-Mar ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In Week 12, we lost 10 KSC contacts: ASCA: 4, Akebono: 6 In Week 13, we will lose 9 KSC contacts: ASCA: 3, Akebono: 6 ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for next Week SSOC: Nishino, Masuda KSC: K. Kobayashi, Yoshimura 7.2 STT Timer Setting The next STT TIMER SET is due on Tuesday '21-Mar-2000 (UT)'. 7.3 OP OP for 20-Mar has already been prepared and transferred to KSC by W11 SSOC tohbans. 7.4 Holiday Schedule Next Yohkoh holiday will be Sunday, 26-Mar-00 (JST). 7.5 Meeting for long-term scheduling among Harca, Asca, and Yohkoh Will be held on March 26. 7.6 New Orbital Elements The arrival date of new orbital elements at SIRIUS was changed to Tuesday. 7.7 Mistake in DSN/NASA pass cancellations We carelessly cancelled several DSN/NASA passes in Strawman Schedule including Sunday operation when KSC will have holiday. Please add back following passes to Preliminary Schedule. ------------------------------------------------------------------------------- NO. DAY START BOT EOT END DSS USER ACTIVITY PASS CONFIG WRK FLAG ------------------------------------------------------------------------------- SUN 09 Apr 282 100 1514 1539 1549 1559 16 SOL R TKG PASS 6645 xxxxxx xxx 323 100 1716 1741 1753 1803 74 SOL R TKG PASS 6646 xxxxxx xxx 2487 323 100 1857 1922 1936 1946 74 SOL R TKG PASS 6647 xxxxxx xxx 2488 323 100 2039 2104 2118 2128 74 SOL R TKG PASS 6648 xxxxxx xxx 2490 324 100 2222 2247 2301 2311 74 SOL R TKG PASS 6649 xxxxxx xxx And If w13 tohban thinks following passes are necessary, please also return them to Preliminary Schedule. ------------------------------------------------------------------------------- NO. DAY START BOT EOT END DSS USER ACTIVITY PASS CONFIG WRK FLAG ------------------------------------------------------------------------------- MON 04 Apr 317 094 1941 2006 2018 2028 74 SOL R TKG PASS 6558 xxxxxx xxx 2423 317 094 2122 2147 2200 2210 74 SOL R TKG PASS 6559 xxxxxx xxx 2425 317 094 2304 2329 2343 2353 74 SOL R TKG PASS 6561 xxxxxx xxx TUE 04 Apr 318 095 1950 2015 2028 2038 74 SOL R TKG PASS 6573 xxxxxx xxx 318 095 2132 2157 2211 2221 74 SOL R TKG PASS 6574 xxxxxx xxx WED 05 Apr 319 096 1819 1844 1855 1905 74 SOL R TKG PASS 6587 xxxxxx xxx 319 096 2000 2025 2038 2048 74 SOL R TKG PASS 6588 xxxxxx xxx 319 096 2142 2207 2221 2231 74 SOL R TKG PASS 6589 xxxxxx xxx THU 06 Apr 320 097 1828 1853 1906 1916 74 SOL R TKG PASS 6602 xxxxxx xxx 2455 320 097 2009 2034 2048 2058 74 SOL R TKG PASS 6603 xxxxxx xxx 2457 320 097 2152 2217 2231 2241 74 SOL R TKG PASS 6604 xxxxxx xxx 2458 FRI 07 Apr 321 098 1657 1722 1732 1742 74 SOL R TKG PASS 6616 xxxxxx xxx 321 098 1837 1902 1915 1925 74 SOL R TKG PASS 6617 xxxxxx xxx 321 098 2019 2044 2058 2108 74 SOL R TKG PASS 6618 xxxxxx xxx 321 098 2202 2227 2241 2251 74 SOL R TKG PASS 6619 xxxxxx xxx SAT 08 Apr 322 099 1706 1731 1742 1752 74 SOL R TKG PASS 6631 xxxxxx xxx 322 099 2029 2054 2109 2119 74 SOL R TKG PASS 6633 xxxxxx xxx 323 099 2212 2237 2251 2301 74 SOL R TKG PASS 6634 xxxxxx xxx ------------------------------------------------------------------------------- 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. SSOC Tohban for w09 asked Hudson-san to prepare an azimuth-elevation map in Santiago station. 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 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 (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. 8.6 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. 8.7 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. 8.8 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. 8.9 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. ---------------------------------------------------------------------------- 9. 'Leap year' related problems 9.1. AOSLOS and AOSLOSGD in KSC Each day from February 29 is dated the next day, i.e., March 1 for February 29, March 2 for March 1, etc. === END ===