----------------------------------------------------------------- SSOC Tohban's Report for Week 43 (21 Oct 1997 - 26 Oct 1997) ----------------------------------------------------------------- SSOC : Shimojo & McKenzie KSC : Yashiro & Shiozawa 0. Meeting attendance (in alphabetical order): Canfield, Hudson, McKenzie, Shibasaki, Shimojo, Slater 1. Solar Activity: Solar activity continued to be moderate. The GOES X-ray level was at under-C. One C-class event was observed (approx. C3.3) at 17:20 (UT) on 21-Oct. in region AR 8097. This region also spawned a halo CME between 12:49 and 14:00 UT on 24-oct. 2. Standard Operation: 2.1 SXT Table Uploads: The following SXT tables were uploaded last week. ------------------------------------------------------------ Pass ID Pass # Table ID ------------------------------------------------------------ Monday 971020-1942 4 971020 P4 ARS1 STD+DKEXP Tuesday 971021-1239 4 971021 P4 ARS1 DKCAL+DKEX Wednesday 971022-1136 3 971022 P3 ARS1 DIFF+DKEXP Thursday 971023-1237 4 971023 P4 ARS2 L+P+DKEXP Friday 971024-1134 3 971024 P3 ARS2 L+P+DKEXP Saturday 971025-1135 4 971025 P4 ARS1 STD+DKEXP ------------------------------------------------------------ 2.2 STT timer setting: We set the STT timer during pass 2 on Oct 21, Monday UT (971021-1032). The next STT timer setting is due on Oct 28, Tuesday. 2.3 Off-pointing for Terminators : None 2.4 HXT, BCS, and WBS calibrations : HXT CAL and GAIN completed this week. 3. Errors and Problems 3.1 SXT Errors and Problems: Three (3) SXT errors were recovered this week. 3.2 BCS Errors and Problems: Two (2) BCS errors were recovered this week. 4. DSN Communications: 4.1 DSN Final Schedule for W43: Two (2) passes were canceled by DSN. 4.2 DSN Final Schedule for W44: Four (4) passes were canceled by DSN. 4.3 DSN Preliminary Schedule for W45: 45 passes were canceled,there were too close to other DSN passes. 4.4 DSN Strawman Schedule for W46: The meeting for ASCA pass conflicts resolution has been deferred to Monday Oct 27. 4.5 Data Transmission from DSN: (/home/flare1/yohkoh/dsn_corrupt/97_42) 263 16 0447 corrupted tape Requested 26 Sep. no response Requested 09 Oct. corrupted tape Requested 14 Oct. Closed/ same data 288 16 1103 not received Requested 21 Oct. Closed/ correct data 288 17 1245 not received Requested 21 Oct. Closed/ correct data 289 17 1448 corrutpted tape Requested 21 Oct. 5. KSC Pass Conflicts and Schedule 5.1 YOHKOH/ASCA/AKEBONO/HALCA Pass Conflicts at KSC: Six (6) Yohkoh passes are lost for week 44. 5.2 Future Schedule: None 6. Special Operations: The normal pointing of the spacecraft was adjusted this week to recenter the sun's image in the SXT CCD. ROG #32 was sent up during Pass 4 on 21-oct. 7. Hikitsugi Items: 7.1 Changing of Passwords The RASM password for DSN schedule changes has been changed. The password for account s88239 on the FACOM GS8400/10 will need to be changed on Saturday 01-Nov. 7.2 "Operational Pass Report" from DSN We received an "Operational Pass Report" from DSN, regarding an interruption in data, due to "loss of lock". The report is attached. -------------------------------------------- From: "James L. Russell" Subject: SOLAR-A PASS REPORT 13786 Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" SOLAR-A OPERATIONAL PASS REPORT ORBIT NR. 13786 1. 290/0642-0651Z (SCHEDULED TRACK TIME) 2. RF AOS: 064250Z 3. DUMP ON: 064452Z 4. DUMP OFF: 065021Z 5. RF LOS: 065100Z 6. ANTENNA: 9M 7. ANALOG TAPE NR. 533 FILE NR. 003 8. METRUM TAPE NR. 36 FILE NR. 23 9. PLAYBACK TIME: 290/1106-1150Z ANALOG: METRUM:X 10. BLOCK COUNT: 19731 11. REMARKS:ANTENNA BROKE LOCK DURING SUPPORT CAUSING AN INTERRUPTION IN DATA. APPROXIMATELY TWO MINUTES AND FOURTEEN SECONDS INTO THE DATA DUMP, THE RECEIVERS DROPPED LOCK. WENT TO PROGRAM TRACK. THE D/L FROM THE S/C APPEARED TO BE DEGRADED CAUSING SOME PROBLEM IN OBTAINING AUTO TRACK. AFTER WE GOT AUTO TRACK, THE S/C DOWN LINK WAS APPROXIMATELY 12 DBM LESS THAN WHAT WE HAD AT START OF TRACK. WE DID A QUICK CHECK TO MAKE SURE THAT WE WERE NOT ON A SIDE LOBE CAUSING THE DEGRADED SIGNAL. THE D/L LEVEL GRADUALLY INCREASED, BUT STILL REMAINED BELOW WHAT WE NORMALLY HAVE FOR SOLAR OF APPROXIMATELY 104DBM. A DATA LOSS OF APPROXIMATELY 10 TO 12 SECONDS WAS NOTED. A POST PASS CHECK OF ALL EQUIPMENT USED FOR THE SUPPORT REVEILED NO PROBLEMS AT WALLOPS. JPL OPS CHIEF WAS NOTIFIED BY TELEPHONE AND STATED THAT HE WOULD OPEN A DR ON THE PROBLEM LATER. ---------------------------------------- 7.3 Tohbans for W44 SSOC : Shibasaki & Canfield KSC : Yashiro & Kasahara 7.4 OP and Command Sheet Status The command sheets and the OP for Monday (27-Oct-97) have been created and transferred to KSC. 7.5 STT timer setting STT timer setting is due on 28 Oct, Tuesday. 7.6 Holiday Schedule: The next holiday will be 02 Nov, Sunday. 7.7 OPOGNEW instead of OPOGEDT ----From W37 report ---------------------------- We continued to use the revised version of OPOGEDT, OPOGNEW. OPOGNEW is the same as OPOGEDT except that the printing out of the OP is simpler. The SSOC tohbans should press the PF4 key (`print') on the mainframe and then print out the OP by typing: IDL> print_op CAUTION : The account, `s80670', for FTP transfering OP from main frame is used. This account's password must be changed every month, same as s88239's one. ***** NOTE ******* Similarly, in order to print out the OG, type: IDL> print_ogall IDL> print_ogsel ***** These softwares are not available. See A/I ****** It is also possible to use the mainframe emulator on flare20 instead of the mainframe terminal for some situations: flare20% telnet mainf1 17 s88239 ex op(opognew) PF3 is {Esc}3 PF4 is {Esc}4 etc. 7.8 STT_PLOT ----From W37 report ---------------------------- It is possible to check the STT Tracking by using the routine `STT_PLOT': First make sure you are on the HOME directory of the yohkoh account then type: IDL> stt_plot (,'DD-MM-YY') This will plot a time variation of the STT output signal level. If the STT is working properly, the signal level should stay in between 400--800, and should vary only in the time period set by the timer. See sample plots in the tohban's manual. --------------------------------------------------------------------------- 7.9 Sirius Data Nothing to report. 7.10 Suggestion to DSN selection rule: mail from JPL ----Quoted from the previous week's report --------------------------------- I understand that you access RASM and choose the passes that are made available to you. We would like you to use the Wallops (WFF) passes as much as possible. In other words, if a pass from one of the DSN sites (Goldstone, Madrid or Canberra) can be substituted by a WFF pass, please use the WFF pass and delete the DSN pass, instead of vice versa. Please understand we are not asking you to give up any coverage but if the same coverage can be accomplished by using WFF instead of the DSN, we would like you to do so. (Albert Chang) --------------------------------------------------------------------------- 8. Action Items 8.1 Further software development It would be greatly appreciated if the SSOC tohbans could recommend any software development that they think will save future tohbans time and which improves the reliability of their work. 8.2 Week-35-A/I-1 SSOC tohbans The SSOC tohbans should inspect the horizon maps sent by JPL and think about whether it would be possible to determine whether the acceptable minumum altitude (Is 10 degrees really the best estimate or is less accepatble?). Please refer to Hudson-san for further information. 8.3 Week-37-A/I-1 /Hudson/status open The following IDL softwares do not work well. Hudson-san will fix them. IDL> print_ogall IDL> print_ogsel end of report -------------------------------------------------------------------------------