SSOC TOBAN REPORT FOR WEEK 30 (25 July to 1 August 1994) SSOC: James Lemen and Alphonse Sterling KSC: A. Okubo and T. Takahashi 1. SOLAR ACTIVITY --------------------------------------------- Solar activity was low this week, but presumably there were many spicules (we didn't check). Because of a problem with the NOAA Vax computer this week, we have no flare summaries from NOAA. The 3-sec GOES data indicates that the X-ray level was mid- to high-A for most of the week. A B3 long duration event occurred on 29-Jul-94 starting just prior to 14:00 UT. 2. STANDARD OPERATIONS ---------------------------------------- 2.1 SXT table uploads JST day Table ID 25-Jul-94 940725 P4 ARS1 DKCAL 26-Jul-94 940726 P2 ARS1 S-OFFPNT [ROG 56h (S/C 8' SOUTH OFFPOINT)] 940726 P3 ARS1 STD+LONG [ROG 20h (S/C NORMAL)] 27-Jul-94 940727 P2 ARS1 STD+LONG 28-Jul-94 940728 P2 ARS1 STD+LONG 29-jul-94 940729 P2 ARS1 STD+LONG 30-jul-94 940730 P2 HIDA PFI DOM 940730 P3 ARS1 STD+LONG 2.2 STT timer set Will be done today, Monday, 1 August. It needs to be set again this Friday, 5 August, at the latest. 3. SPECIAL OPERATIONS ---------------------------------------- 3.1 South Offpoint 26-Jul ROG 56h(S/C SOUTH) (P2) ( Offset Pointing) ROG 20h(S/C NORMAL)(P3) 3.2 HIDA Campaign A special campaign to search for emerging flux regions organized by Kurokawa at Hida Observatory began on Saturday. SXT observed a newly emerging flux region using PFI dominant mode. SXT will continue to participate in the campaign during the coming week. 3.3 Jupiter (No Dave,) Yohkoh didn't manage to observe the spectacular collision of the comet and Jupiter (despite this week's all-gaikokujin SSOC staff...). 4. ERRORS AND PROBLEMS ---------------------------------------- 4.1 FLARE2 workstation crash Sometime on Monday evening the Flare2 workstation stopped working. Thus, we could not use the yohkoh account on flare11 for RASM or other operations on Tuesday. Fortunately, we had already run op_first_guess a day ahead of schedule. We could not observe real-time data either for a period of time on Tuesday, but thanks to quick action by Mons Morrison, the auto_toban2 program was switched to isass0 and then later to isass2. The flare2 problem was very disruptive to most people who were at ISAS this week and an unknown that were not ISAS, since we could not even log into the Flare workstations. The SSOC's finally discovered that the SXT account could be accessed and we began to use it (since SXT has its home directory on flare7) for routine operations (e.g., krasm). The JointNet software that used to reside on Flare2 has been lost forever. JointNet will be installed instead on Flare14. The JointNet software provides the transfer function to the Sirius mainframe computers. Currently, we are using the Flare1 workstation as our primary JointNet server. So, until JointNet is installed on Flare14, we have no backup machine to provide the telemetry data to the reformatter on isass0 in the case of an Flare1 failure. One problem we had was that the orbital elements could not be transferred from the Facom mainframe to Isass0 via Flare2 using JointNet. To overcome this problem J. Lemen and M. Morrison prepared software to use the Traj file outputs (which is copied using FTP directly from the Facom to Isass0). Shuuto san kindly also worked very hard to enable the files to be transferred using JointNet on Flare1. He will also implement FTP copies to Isass0 and Isass2 to provide a backup in the future. The SSOCs are very grateful to Morrison and Shuuto for their prompt and efficient assistance. 4.2 Flare11 Keyboard The flare11 keyboard gave us a lot of trouble. On Monday we decided to swap it with the keyboard on flare9 because the "return" and "i" keys did not work well. The current keyboard is better, but also has its problems. Strangely, its "i" key also does not work very well! For operational support, and especially for RASM password entries, we think the SSOC should have a better functioning keyboard. 4.3 SBR RNG commands The SSOC and KSC Tohbans this week disagreed about what the SBR RNG commands actually do. According to Kosugi's manual, the ranging of the spacecraft can only be done if the KSC antenna elevation is between 20 and 70 degrees. It was the opinion of the SSOC Tohbans that the SBR RNG only configures the transponder on the spacecraft, and there it should really be necessary to switch it if it is not going to be used. To us, it seemed to be an unnecessary toggle of a relay. (KSC had a different opinion, thinking that the command was absolutely necessary to allow spacecraft antenna operations to continue). It may be that this command is simply executed to make all KSC antenna operations the same. Or, it may that the command is sent to make the transponder configuration consistent with the antenna that is selected, however, we then ask is this consistency maintained with AOS commands (what about DSN antenna commands)? We spoke to Kosugi san about this matter and he will check with NEC to obtain their advice. 4.4 BCS Recovery A BCS recovery sequence was executed successfully during Pass 3 on 29 July 1994 in response to an SEU found during Pass 2. 4.5 GOES 1-minute averages and NOAA region summaries The transmission of GOES 1-minute averages and the NOAA region summaries was interupted this week. The cause was reportedly a computer hardware fault with the Selsis Vax computer in Boulder. As a result, there were no one-minute GOES plots or GOES event summaries. 4.6 Printer Trouble in KSC As far as we know, there is still a problem with one of the printers at KSC and daily sun-spot regions should be Faxed to them. However, not many plots were received, presumably because of the problem with the Selvax computer. 5. DSN COMMUNICATIONS ------------------------------------------ 5.1 DSN schedule delivery All schedules were normally delivered early or on time. 5.2 Re-transmission requests The data for the Madrid pass for 21-Jul-94 at 15:06 (DOY=202) have not yet arrived. A retransmission Fax request was sent. 6. YOHKOH/ASCA PASS CONFLICTS --------------------------------- Two KSC passes were lost during Week 30 because of conflict with ASCA (5th passes on 28- and 29-Jul). We are going to lose the 5th passes on 1 and 2-Aug during Week 31. The fifth pass on Friday at 03:27-03:38 UT ends about 14 minutes prior to the start of the ASCA pass. We have agreed to end our pass one minute early so that there will be 15 minutes of free-time between the end of the Yohkoh operations and the beginning of the ASCA operations. 7. Holiday Schedule --------------------------------- Yohkoh holiday schedule has been set through the beginning of September in such a way as to minimize the ASCA conflicts, but within our Sunday-holiday policy. The next holiday will be on 6 August. 8. HIKITSUGI ITEMS --------------------------------- 8.1 Tobans for week 31 SSOC: Uchida/Magara KSC: Takahashi/Wakabayashi 8.2 STT Timer Set The STT timer must be set no later than Friday. 8.3 ASCA/Yohkoh KSC conflict operations The fifth pass on Friday must end about 1 minute early so that Yohkoh operations terminate at 15 mintues prior to the beginning of ASCA operations (see section 6). 8.4 Yohkoh/ASCA pass conflicts At present, it is SSOC toban's job to negotiate with ASCA people for telemetry conflict resolution. On every Wednesday, SSOC toban should negotiate with Nagase-san for KSC contacts for the next week. On Fridays at 2 PM the SSOC should meet in B-tou with in the ASCA room with Itoh-san and Steve Skinner to resolve DSN conflicts for the STRWMAN schedule. Before coming to this meeting, use KRASM to copy the STRAWMAN schedule and then in IDL use the command IDL> .run dsn_conflict to print out a summary sheet. Bring three or four copies of the printout to the meeting. Please notify J. Lemen of any problems or suggestions with this program. Please consult the English Tohban manual for more details. 8.5 Daily sun-spot region maps from NOAA One of the printers at KSC is not fixed. SSOC toban should send a daily NOAA sun-spot region map to KSC every morning. 8.6 New English Manual Alphonse Sterling worked hard to revise the English Tohban manual. A new version of the check sheet has also been prepared. It probably needs a few minor corrections, so please make sure to enter these and notify Alphonse. Please make sure to use the check sheet properly. We were surprised to see that the box next to "Delete sr0001.opseq.infil(op*******) files & condense" had been dutifully checked off by several weeks' tohbans, but that the action had not actually been accomplished!! 8.7 op_first_guess modifications op_first_guess was modified to allow the user to more easily delete passes that are in conflict with ASCA. In addition, the program has been modified so that the summary cover page and the pass sheets will more accurately reflect which pass has been deleted. If the weekend option is selected, however, the pass sheets may still be mis-numbered (since the program cannot know which pass is the real "first" pass of the operational day). 8.8 FACOM mainframe downtime on 28 Aug 1994 It was reported that all the FACOM mainframe computers will be down for routine maintenace on 28 Aug, which is a Sunday.