SSOC Tohbans Report for Week 17, 1996 (22 April - 29 April 1996) SSOC: M. Irie and R. Kano KSC: T. Shimizu and A. Ohkubo 0. Meeting Attendants ---------------- The weekly operation meeting was not held this week, because this Monday was a holiday. Next Monday is also a holiday. 1. Solar Activity ---------------- The Sun was quiet. One M-class flare was, however, occurred near the west limb at 04:40UT on 22 Apr. Yohkoh observed the initial phase of this flare. 2. Standard Operation ---------------- 2.1 SXT table uploads Date(JST) Pass Table ID ------------------------------------------------------------------- Monday 22-APR-96 20:09 2 960422 P2 ARS1 STD+LONG Tuesday 23-APR-96 20:28 2 960423 P2 ARS1 DKCAL Wednesday 25-APR-96 00:13 4 960424 P4 ARS1 STD+DIFFU Thursday 25-APR-96 21:06 3 960425 P3 ARS1 STD+LONG ------------------------------------------------------------------- 2.2 STT timer setting STT timer was set at pass 2 on 22 Apr (JST). STT timer should be stopped until 02 May (JST). 3. Errors and Problems ---------------- 3.1 SXT errors none 3.2 BCS errors none 3.3 HXT At the end of HXT calibration taken at pass 4 on 24 Apr, KSC tahban executed "HXA-CAL-OFF" instead of "HXT-CAL-OFF". They found this mistake and then executed "HXT-CAL-OFF" soon. Sawa san checked the effect of the "HXA-CAL-OFF" command and found that HXT has no problem. 4. DSN Communications ---------------- 4.1 DSN Final schedule for W17 no cancellation 4.2 DSN Final schedule for W18 We canceled 6 passes. DSS-74 DOY 120/1410 DSS-76 DOY 120/0402 DSS-74 DOY 120/1429 DSS-74 DOY 120/1450 DSS-74 DOY 120/1344 DSS-76 DOY 120/1757 4.3 DSN Strawman schedule for W19 We canceled 35 passes. 12 of them are canceled due to conflicts with ASCA. 4.4 DSN Preliminary schedule for W19 no cancellation 4.5 DSN Strawman schedule for W20 The Strawman schedule for W20 arrived on last Saturday. Hudson san will negotiate with ASCA on this Monday. 4.6 Data transmission from DSN .......................................................... 104 46 0305 6% less. Requested 19 Apr. Closed/correct block. 104 74 2105 Not received. Requested 15 Apr. no correspondence Requested 19 Apr. no correspondence Requested 23 Apr. Closed/correct. 105 66 0057 Header corrupted.(data OK) Requested 15 Apr. no correspondence Requested 19 Apr. Closed/same header. 106 17 1108 Different from FAX Requested 19 Apr. Closed/correct. 107 74 1512 data less. Requested 19 Apr. Closed/same data. 108 76 0319 data less. Requested 19 Apr. Closed/correct data. 111 76 0416 Header corrupted(data OK) Requested 22 Apr. no correspondence. Requested 26 Apr. 113 17 0628 44% frame less. Requested 24 Apr. no correspondence. Requested 26 Apr. *** Note *** Had we better ask you to resend ? Not corrupted data but less. 101 17 1441 103 17 1337 104 16 1355 Requested 22 Apr. Closed/Same data. .......................................................... Other data are regularly transmitted this week. 5. Yohkoh/ASCA Pass Conflicts at KSC ---------------- 5 passes in W17 were lost due to conflicts with ASCA. One of them (pass 1 of 24 Apr.) was lost due to the emergency operation of ASCA. 8 passes in W18 will be lost. 6. Special Operations ---------------- 6.1 Change the off-point OGs 2 of the off-point OGs, OG-33,-34(dec), were changed at pass 1 of 22 Apr. 6.2 HXT fine gain adjustment and calibrations HXT fine gain was adjusted at pass 3 of 23 Apr. Then, HXT calibrations were carried out at pass 4 of 23 Apr, pass 4 of 24 Apr, and pass 4 of 26 Apr. 6.3 BCS calibrations BCS source calibration was carried out during 10:40UT to 10:50UT on 25 Apr. BCS STIM CAL was carried out at pass 4 of 26 Apr. 6.4 Emergent Operation of ASCA ASCA team found that the pointing of ASCA was about 2 deg. different from the expected direction. The Yohkoh pass, pass 1 of Apr 24, was canceled, due to the emergency operation of ASCA. 7. Holiday Schedule ---------------- The next holiday is on Sunday, May 5 (JST). 8. Hikitsugi Items ---------------- 8.1 Tohbans for W18 KSC : A.Okubo & K.Yoshimura SSOC : K.Yaji & J.Khan Katano san (NEC) takes a holiday until next Monday. She will appear at ISAS next Wednesday. Hudson san will help SSOC tohban for checking strawman schedules for w20 & w21. 8.2 STT timer setting The STT timer should be stopped until 2 May (Thu). 8.3 Transmission of OPs It is no longer necessary to confirm the transmission of OP/OG files to KSC by checking the printout on the 3rd floor in B-toh. Instead, the time of transmission of the OP/OG files should be noted down. If the SSOC or KSC tohbans notice any failure in transmission of the OP/OG files then it should be reported to Shuto-san and Kosugi-san. 8.4 SXT patrol image dumps A block command `DP BC 8C-05 (hex)' should be executed whenever an SXT Table is uploaded. Since the Sun is very quiet, ARS parameters need to be checked by the SXT patrol images dumped by this command. 8.5 WWW server of DSN The DSN NOCC Information Server (NIS) is now on-line and available for DSN scheduling operations. The URL location is: http://dsn.jpl.nasa.gov/nss (But it is not used for operations, so does this item need to be mentioned in the tohban report? - AI of JRL) 8.6 New works not mentioned in the manual The data corruptions from DSN(JPL) and the re-transmission request logs are put on the directory ~/dsn_corrupt by Katano-san. SSOC Tohbans should check these logs and report the problems.