SSOC Tohbans Report for Week 52_95 (25 December - 31 December 1995) SSOC: S. Masuda KSC: S. Morita and Y. Iizuka 0. Meeting Attendants -------------------------------------------------------- No meeting was held. 1. Solar Activity ------------------------------------------------------------ The solar activity was very low. No remarkable flare occurs during this week. 2. Standard Operations ------------------------------------------------------- 2.1 SXT table uploads 3 SXT tables were uploaded: ------------------------------------------------- Date (JST) Pass# Table ID 26-DEC-95 3 951225 P3 STD+DIFFU 28-DEC-95 2 951227 P2 ARS1 DKCAL 29-DEC-95 2 951228 P2 ARS1 STD ------------------------------------------------- 2.2 STT timer setting STT Timers were set in the passes 951225-1238, and 951228-1134. 2.3 SXT terminator images and S/C offset pointings The following table shows SXT terminator images and S/C pointing information. ------------------------------------------------------------- Date Time (UT) OG comment (OG#) ------------------------------------------------------------- 26-Dec-95 09:08:47 Normal 14:00:31 Normal 15:37:35 Normal 27-Dec-95 09:26:39 Normal 14:18:23 Normal 28-Dec-95 06:28:31 S/C W.100 S.539 (33) (Normal pointing at 07:10:07) ------------------------------------------------------------- 3. Errors and Problems ------------------------------------------------------- 3.1 SXT errors An SXT Bitmap Error was found in the pass 951226-1136 and was recovered during the same pass with Yobi C. 3.2 BCS errors A BCS error was found in the pass 951227-1136 and was recovered in the next pass (951227-1240). 3.3 Telemetry error As reported in the previous operation report, during the pass 951224-1445 a telemetry error occurred. A part of the real-time data was lost. NEC people investigated the cause of this trouble and sent us a brief report. According to it, that pass is so-called zenith pass and the center frequency of some instrument in the S-band de-modulator shifted due to noise just after the 20m antenna was rotated. 4. DSN Communications -------------------------------------------------------- 4.1 DSN Final schedule for W52 We cancelled 5 DSN contacts in the Final schedule for W52. 4.2 DSN Final schedule for W01 We cancelled 20 DSN contacts from the Final schedule for W01. These are almost due to the new-year-holiday. 4.3 DSN Preliminary schedule for W02 We cancelled 1 contact in the Preliminary schedule for W02. 4.4 DSN Strawman schedule for W03 Hudson-san will cancel some contacts from the strawman schedule for W03 on Dec.29. 4.5 Pass additions None. 4.6 Re-transmission requests and results Katano-san requested re-transmission of the following pass: DOY 354 20-Dec-95 13:29-14:13, DOY 355 21-Dec-95 17:46-18:31 DOY 358 24-Dec-95 13:43-14:30 DOY 361 27-Dec-95 07:49-08:35 DOY 361 27-Dec-95 14:41-15:25 To date the data has still not arrived. 5. Yohkoh/ASCA/SFU Pass Conflicts at KSC ------------------------------------- In week 52, 4 and 2 KSC passes were lost due to conflicts with ASCA and SFU, respectively. 6. Special Operations -------------------------------------------------------- 6.1 OGs for the new-year-holiday OP We revised two OGs (#22(16H) DSN LOS H and #23(17H) DSN LOS M) for the special OP which was uploaded in the pass 951228-1444. A command 'TMS ON (L)' was removed from these two OGs. These OGs will be changed again into the original form in the pass 960104-1031. 7. Holiday Schedule ---------------------------------------------------------- 7.1 New year holidays The new year holidays are from 29-Dec-95 to 03-Jan-96. The first operation in 1996 will start at about 15:18 04-Jan-96 UT. 8. Hikitsugi Items ----------------------------------------------------------- 8.1 Tohbans for W01 KSC: J. Sato SSOC: T. Kosugi and S. Savy 8.2 STT timer setting The next STT timer set is due on 04-Jan-96 UT. This command has been made and was sent to KSC. 8.3 Offpoint terminator images If terminators appear in the OP generated by running OP_FIRST_GUESS, then the OP should be FAXed to the SXT_CO (Chief Observer) in D-toh. The SXT_CO will then inform the SSOC tohbans if offpointing will be carried out. If so, the OP will need be edited appropriately. 8.4 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. 8.5 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. 8.6 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 ------------------------------- End of Report ---------------------------------