SSOC Tohban Report for Week 52 (19-Dec-2000 to 26-Dec-2000) SSOC: Y.Kato, M.Kubo KSC: K.Shinoda,H.Tonooka(19-), S.Nagata(-19) 0. Meeting Attendees R.Kano, Y.Kato, J.I.Khan, T.Kosugi, M.Kubo, K.Matsuzaki, Y.Ogawara, T.Sakao, A.Takeda, Nishio,Akita, and Te.Watanabe. ------------------------------------------------------------------------------- 1. Solar Activity Solar activity has been low in this week. M and X-class flare did not occurred in this week. ------------------------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded: JST Day UT Start Time Pass Table ID ====================================================================== Tuesday AM 18-DEC-00 16:22 2 001218 P2 ARS1 STD Tuesday PM 19-DEC-00 13:05 1 001219 P1 ARS1 DARK Wednesday AM 19-DEC-00 18:08 4 001219 P4 ARS1 STD Wednesday PM 20-DEC-00 13:08 1 001220 P1 ARS1 DIFF Thursday AM 20-DEC-00 18:12 4 001220 P4 ARS1 STD Friday AM 21-DEC-00 16:34 3 001221 P3 ARS1 STD Saturday AM 22-DEC-00 14:56 2 001222 P2 ARS1 STD Sunday AM 23-DEC-00 15:00 3 001223 P3 ARS1 STD ====================================================================== 2.2 STT Timer Setting The STT timer set three times in this week. Monday Pass 2 (PASS ID: 001218-1133) Friday Pass 1 (PASS ID: 001222-0927) Saturday Pass 1 (PASS ID: 001223-0824) ------------------------------------------------------------------------------- 3. Special Operations 3.1 HXT CAL HXT fine gain adjustment was done on Wednesday(PASS ID:001220-1030) HXT calibration was done three times from Thursday to Friday (PASS ID: 001221-1030, 001221-1237 and 001222-1134). 3.2 STT Recovery We were not able to catch the Canopus on Fridaty, but On Saturday we tried again and succeeded in tracking the Canopus. ------------------------------------------------------------------------------- 4. Errors and Problems 4.1 SXT Errors We found a Bit Map error during pass 2 of Saturday night (PASS ID: 001223-0927).We hitted Yobi.C command and error disappeared completely during pass 2 4.2 DP Errors None 4.3 BCS Errors None ------------------------------------------------------------------------------- 5. NASA Station Schedule 5.1 Contact Pass Cancellations/Additions The following schedule changes occurred and/or requested: ======================================================================= DSN/NASA Week Schedule Changes ======================================================================= Real-Time 52 4 cancellation Final 53 19 cancellations Forecast 01 15 cancellation Strawman 02 ------------ ======================================================================= We were not able to cancel DSN schdules in w02 because there is not Strawman's data at the ftp-site in Wallops. 5.2 Data Transmission from NASA Ground Stations ----(Copied from /home/flare1/yohkoh/dsn_corrupt/2000/00_52)---- 342 76 1613 not received requested 12-Dec no response requested 15-Dec Closed/ No DATA WPS Email: A DR was sent out describing the problem. Once the Wallops scheduling find the DR describing the problem they will forward the information on to us. 348 82 0629 corrupted tape requested 15-Dec Closed/ correct data 347 66 0317 missing data requested 15-Dec Closed/ same data 349 82 0812 corrupted tape requested 21-Dec 350 66 0509 not received requested 21-Dec Closed/ No Data At AOS TCA 1 and 2 did not output any blocks. 6000 blocks were lost. Performed an init on TCA1 and data was out putting. ------------------------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule - Yohkoh lost no pass. - Yohkoh lost no pass. ------------------------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for Next Week SSOC: Nishio, Akita KSC: Shinoda(-30), Tonooka(-30) 7.2 STT Timer Setting The STT TIMER will set on Monday, 25-DEC-00 JST, and will set again on Friday, 29-DEC-00 JST. 7.3 Holiday Schedule (KSC 34m antenna TEL: 0994-67-3152) None 7.4 Special Operation If last weeks's HXT calibration results have some problem, HXT fine gain adjustment and HXT calibrations will be requested in W53. 7.5 Year-end (Century-end) Schedule The final KSC contact in 20th century is, 29-DEC-00 15:24 UT. The first KSC contact in 21th century is 04-Jan-01 5:34 UT (Pass1). KSC tohbans will move to KSC in the morning. ------------------------------------------------------------------------------ 8. Unchanged Hikitsugi Items from Previous Weeks: 8.1 Weekend Terminators If possible, please schedule terminator opportunities on any weekend table (i.e., if room permits). 8.2 Software Problems PR_GEV with /hc keyword produces a temporary output file but does not print it at the printer. 8.3 OP_FIRST_GUESS Problem (1)(1999-w38, 1999-w45) 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. (2)(1999-w46, 1999-w45) 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. 8.4 Keeping Wallops Contacts (1999-w42, 1999-w45) 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. 8.5 DSN Pass Additions (2000-w20) *** Don't forget to request pass additions! *** Yohkoh loses DSN passes as follows: (1) Canceled due to conflicts with ASCA (by Seko-san) (2) Canceled because Santiago is unavailable (Actually it is now available until end of 2000) (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 cancellations by Seko will generally be marked in red ink, and those by SSOC by pencil: Only request additions from the penciled cancellations). The routine to use is ADD_DSN: e.g., IDL> ADD_DSN, 28, /prelim and IDL> ADD_DSN, 29, /final Decide on the complete list of passes to be added and select them like CANCEL_DSN. Then ftp and email the appropriate file. 8.6 34m ANT Operation (2000-w33) 34m Operation will be done only on Sunday (=Yohkoh holiday) for up to 2 or 3 passes. There will be no 34m OP to compensate for the lost pass due to the conflict with the other satellites. For further details, please ask Kosugi-san. Note that 34m operation requires more CE slots in OP table than DSN operation does. Weekend OP cannot accomodate many 34m passes without sacrificing even more DSN passes. Due to the narrow antenna beam, acquision of the signal from the satellite at the first contact need some time. It is suggested that the KSC REPRO should start one minutes later compared to the 20 m operation. (w46) Also, max elevation of the 34 m antenna should be checked carefully using Weekly Visible Diagram (do not trust op_first_guess nor AOSLOS listing). Max elevation should be less than 76 degree. (w46) 8.7 Weekend DNS passes (2000-w49) We used to schedule 12 DSN passes during the weekend, but now we have two passes with the KSC 34m antenna. So only 9 or 10 DSN passes should be scheduled for the weekend. Please be sure to cancel extra passes as early as possible. 8.8 DSN Max Elevation DSN max elevation must be higher than the following value: Contact Max El.(degrees) Madrid 10.0 (2000-w45) Santiago 13.5 (2000-w44) Wallops 6.5 Others 7.0 8.9 OP and SXT Table Transfers Trouble (2000-w34) OP and SXT tables can not be transferred to KSC correctly when the MS computer at ISAS is in Initial Program Load(IPL). ASCA and HALCA groups operate the satellite from ISAS. We must not transfer OP and SXT tables in the following periods: "An hour before the beginning of HALCA/ASCA contact and an hour after the end of HALCA contact." As for IPL of MS computer at KSC, operators confirm if new OP and SXT tables come to MS computer at ISAS after the IPL. 8.10 Pass Conflict Issues In the operation meeting among ASCA, AKEBONO, HALCA, and YOHKOH, held on Thursday 31-Aug-00, ASCA group proposed that (1)they used only one pass a day, time of which is located between 4 and 20 (JST), and that (2)they wouldn't use DSN contacts for ASCA operations. 8.11 STT MAP operation in OP (2000-w42) If possible, please schedule STT MAP operation a few times in one OP. OG-030(DEC) CMPN OBS ON OG-117(DEC) STT MAP START ; 1 step after CMPN OBS ON OG-118(DEC) STT MAP END ; 5 min (10steps) after STT MAP START OG-031(DEC) CMPN OBS OFF ; 1 step after STT MAP END Please put the above set of commands in the Canopus window, manually. It is better to put it during night. Please leave a several minutes for Canopus tracking, before starting STT MAP operation. [end of report]