SSOC Tohban's Report for Week 20 (10-May-99 -- 16-MAY-99) SSOC: M. Miyashita and M. Ohyama KSC: M. Shinkawa and T. Sakao 0. Meeting Attendance Hudson, McKenzie, Miyashita, Ohyama, Sawa, Starling, Suematsu, Watanabe, Yashiro -------------------------------------------------------------- 1. Solar Activity Solar activity dropped during the week; the GOES background was at about B5 by the end of the week. (From SXT cheif obsrver's report) -------------------------------------------------------------- 2. Standard Operations 2.1 SXT Table Uploads The following SXT tables were uploaded during week 20: ===================================================== JST Date Pass Table ID ===================================================== Mon 10-May-99 2 990510 P2 ARS2 ST+J104 Tue 11-May-99 2 990511 P2 ARS1 DARKCAL Wed 12-May-99 2 990512 P2 ARS1 DIFF Thu 13-May-99 4 990513 P4 ARS2 ST+J100 Fri 14-May-99 2 990514 P2 ARS1 STD ===================================================== The "J100" and "J104" in the name refers to JOP 100 and JOP 104. 2.2 STT Timer setting STT timer was set during pass 2 on 11-MAY-99 (JST). -------------------------------------------------------------- 3. Special Operations 3.1 Spacecraft pointing OG 85(dec) (S/C E.9.89 S2.77) was included an OP which was uploaded on Wednesday (12-May). This OG was done four times at terminator opportunities. -------------------------------------------------------------- 4. Errors and Problems 4.1 BCS Errors: A BCS error was found at 2nd pass on 14-May(990514-0516), but was recovered at pass 2 and 4. (Pass 3 contact was lost due to conflict with ASCA.) 4.2 SXT Errors: no SXT error 4.3 isass5 trouble 'isass5' WS was trouble last Saturday. It will be recovered today (May 17). -------------------------------------------------------------- 5. NASA Station Scheduling 5.1 Contact pass cancels/adds The following DSN/NASA passes were added/deleted: =================================================================== DSN/NASA Schedule Week Schedule Changes =================================================================== Realtime 20 1 pass deleted by SSOC Final 21 1 pass deleted by SSOC Final 21 1 pass deleted by DSN (Santiago) Preliminary 21 no cancel Strawman 22 66 passes deleted by SSOC =================================================================== 5.2 Data Transmission from NASA Ground Stations -(From /home/flare1/yohkoh/dsn_corrupt/99_20)------------ 109 80 1554 corrupted tape requested 23 Apr no response tape requested 27 Apr no response tape requested 07 May Closed/ correct data 110 80 0738 corrupted tape requested 23 Apr no response tape requested 27 Apr no response tape requested 07 May no response tape requested 11 May Closed/ same data 110 80 0918 corrupted tape requested 23 Apr no response tape requested 27 Apr no response tape requested 07 May no response tape requested 11 May Closed/ same data 111 80 1115 corrupted tape requested 27 Apr no response tape requested 07 May no response tape requested 11 May no response tape requested 14 May 112 80 0806 corrupted tape requested 27 Apr no response tape requested 07 May no response tape requested 11 May Closed/ correct data 113 80 0821 corrupted tape requested 27 Apr no response tape requested 07 May no response tape requested 11 May no response tape requested 14 May 114 80 1200 not received requested 07 May Closed/ correct data 123 74 1610 not received requested 13 May 123 74 2120 not received requested 13 May 124 74 1625 not received requested 13 May 124 74 1951 not received requested 13 May 130 74 1757 not received requested 13 May -------------------------------------------------------------- 6. KSC Pass Conflicts and Schedule In week 21, 9 KSC contacts will be lost due to conflict with ASCA and HALCA. ASCA - 5 contacts , HALCA - 4 contacts -------------------------------------------------------------- 7. Hikitsugi Items 7.1 Tohbans for week 20 SSOC: T. Watanabe, S. Yashiro, Y. Suematsu KSC: T.Sakao, R. Haga 7.2 STT timer setting STT timer setting is due on Tuesday, 18-May-99 (JST) 7.3 Holiday Schedule The next holiday will be Sunday, 23-May-99 (JST). 7.4 DSN Contacts in W23 We selected DSN night contacts in W23, so we have only 1 or 2 Wallops passes per day. If many passes are canceled and Yohkoh have few DSN contacts, please request an addition of DSN contacts. 7.5 Terminator Images for weekend OP If there is empty slot in the weekend OP, please add OG for terminator image to the weekend OP. Normally we can not do this, because there is no empty slot in the weekend OP. 7.6 Elevation (from previous week) SSOC Tohbans need to examine the maximum elevation when checking the DSN final schedule, because the maximum elevation may change from the strawman to final schedule due to changing orbital elements. DSN requires a maximum elevation more than 7 degrees . This is listed in the English language manual, but not the Japanese language manual. If this information is put in the manual we can delete this item from hikitsugi. 7.7 KSC pass conflicts (from previous week) ASCA conflicts cause the loss of about 10 KSC contacts per week at this time We do not know which contacts Yohkoh will lose until the weekly meeting. Santiago contacts occur on the same orbits as KSC contacts. Therefore, keep as many Santiago contacts as possible in the DSN Strawman and Preliminary Forecasts. === END ===