SOT Shift Report Shift H333 Duration: 19 Jun 2000 22:00 EDT - 20 Jun 2000 00:00 EDT 20 Jun 2000 02:00 GMT - 20 Jun 2000 04:00 GMT SOT Lead: Tom Aldcroft Spacecraft: Mike McGuirk FOT/Science Liason: HRC: ACIS: ======================================== Plan ---- CAP 621C: Manual HETG retraction Events ------ 02:05 AOS on DSS-66 02:18 PCAD stabilized after manuever for obsid 882 (NGC 4395), 02:20 Start CAP 621c: PCAD configuration 02:23 Enable and activate SCS 193 (PCAD deadman) 02:24 Started A_MECH_CONFIG (transition from NPNT to NMAN) 02:28 Switch to format 4 02:32 Start script M_HETG_RETR_B_SCS to move grating 02:43 Resume script, to enable SCS 200 and start full move 02:55 One-second pulse 02:59 Reconfigure PCAD 03:05 NPNT 03:08 Return to format 2 03:50 LOS Notes/Issues/Problems --------------------- - Procedure was successful and HETG is retracted - The HETG enable logic status monitor (4HENLBX) showed ENAB prior to retraction. This was unexpected and not completely understood, but it was decided this posed no problem for continuing the procedure - The HETG retract limit switch never indicated RETR, not even momentarily. This was the case for both the long move and the one second move. Based on the telemetered back EMF, it was roughly estimated that the grating movement was about 0.25 deg during the one second move. This was apparently insufficient to trip the limit switch. Snapshot -------- UTC 2000:172:03:50:01 (Jun20) f_ACE 4.26e+02 F_ACE 4.97e+08 Kp 1.3 R km 123325D OBT 2000:172:03:49:29 CTUVCDU 7947903 OBC s/w NRML FMT2_NORM CPEstat OBT 77860169.36 ONLVCDU 7947888 OBC Errs 0 OBSID 882 EPState SUN SIM TTpos 75623 HETG Angle 80.2 PCADMODE NPNT RA 186.442 Bus V 31.49 SIM FApos -467 LETG Angle 78.3 PCONTROL NPNT Dec 33.564 Bus I 24.17 AOFSTAR GUID Roll 253.638 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang -0.85 Yaw Rate -0.24 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang -3.46 Pitch Rate -0.18 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.09 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -7.46 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta 6.76 Batt 2 SOC 100.00% ACIS Stat7-0 64 Avg OBA Temp 50.97 SA Resolv 83.10 Batt 3 SOC 100.00% Cold Rad -127.9 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -82.0 OBA Trng Fault NFLT +Y SA Amps 11.21 HRMA power 62.20 SCS 128 -Y SA Amps 12.95 EPHIN Geom LARG OBA power 61.30 SCS 129 +Y SA Temp 107.37 E150 81 SCS 130 -Y SA Temp 107.64 E300 22 Roll Mom. -6.102 E1300 2 Pitch Mom. -8.142 UpL Cmd Acc 20001 EPH A-Leak 0.4400 P4GM 1 Yaw Mom. 4.736 Cmd Rej A 89 EPH B-Leak 0.0720 P41GM 0