UVCS MISSION LOG ---------------- Date: 08 May 2009 ----- Last revision: 19 May 2009 (Wu) -------------- File Name: 2009.05.14.a.log ---------- Compiled by: M. Uzzo, R. Wu ------------ UVCS Activity: Recover UVCS from Modified Hard Safe Configuration -------------- Conduct LYA Stimulus Pulse Test Thermal Equilibration of UVCS in Soft Safe Configuration SOHO Activity: MANEUVER TIMELINE FOR 12 MAY 2009 SK/MM/Roll -------------- Standard Disclaimer: All times are in UT and are estimates. Total Fuel Usage: ~32 grams OCD (offpoint flag, SVM times, ESR flags) due Wednesday 6 May SORR on Thursday 7 May Limit violation sheets for safing due: Friday WEDNESDAY 13 MAY 2009 --------------------- D43/D46 04:10 - 06:25 D54 10:10 - 15:25 D24 23:45 - 02:20 SOCs here at 8am SVM 12:00 Submode Change to Submode 6 ~13:00 (if not done yesterday) NRT for ~2 hours if CDS crashes THURSDAY 14 MAY 2009 -------------------- D43/D46 04:25 - 06:25 D65 14:45 - 19:00 LASCO safes ~15:00 CDS recovery (use TSTOL c_fl_opendoors from Maneuver End Script) at ~15:15 UVCS recovery, UVCS part at ~15:30 UVCS recovery, FOT part at ~16:00 SVM Reserve Time ~16:30 LASCO recovery (~30 minutes) at ~17:30 CDS & LASCO load ~18 EOF Staff: M. Uzzo: Lead Scientist ---------- M. Uzzo: Commander, Planner R. Wu Command file: 09.05.14.13:47:58.cmd.log Activity: --------- 1) Recover UVCS from Modified Hard Safe Configuration Sequence: Manual SCI_SPEC: UVCS is recovered from Hard Safe Configuration into a Soft Safe configuration in order to allow UVCS temperatures to return to nominal. Detector High Voltage remains ramped down and turned off instrument is rolled to nominal East (35156 Engineering Units). The Mirror stays at 1.5 Solar Radii with 1.5 mm overocculting. UVCS Aperture Door is opened at this time, Internal Mirror / Occulter Heater set to 0% duty cycle (255). OVI Detecor Timing and Charge Thresholds set. FOT told to continue to use UVCS ESR Limit Set. FOT component of UVCS recovery, including enabling of the ESR Warning at 15:51 UT and Experiment Offpoint Flags (at, 15:54 UT, and the TSU Substitution Heater (Circuit #84) OFF completed at approximately 15:57 UT UVCS NRT portion of recovery begins at approximately 15:25 UT. Note: Recovery times (below) are approximate. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2009.05.14.15:25 end: 2009.05.14.15:41 ONUMs = 25435 Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 270 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 100 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 210000 - LYA HIGH VOLTAGE RAMPED DOWN AND POWERED OFF - OVI HIGH VOLTAGE RAMPED DOWN AND POWERED OFF - VLD HIGH VOLTAGE RAMPED DOWN AND POWERED OFF - LYA DETECTOR POWERED OFF - OVI DETECTOR POWERED ON - VLD DETECTOR POWERED OFF - LYA mask: LYA_VEX_4x1 in slot 2 - OVI mask: OVI_chk_1xfull in slot 6 Fits Files: 2) LYA Stimulus Pulse Test Sequence: TakeUV_TxN.tcl SCI_SPEC: OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2009.05.14.15:41 end: 2009.05.14.15:45 ONUMs = 25436 (2 exps) Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 270 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 100 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 210000 - LYA MCP Voltage: 0 - OVI MCP Voltage: 0 - LYA mask: LYA_303_8x2 in slot 3 Fits Files: q09.05.14.15:39:36.lya.dat 3) Thermal Equilibration of UVCS in Soft Safe Configuration Sequence: none SCI_SPEC: UVCS is recovered from Hard Safe Configuration into a Soft Safe configuration in order to allow UVCS temperatures to return to nominal. Detector High Voltage remains ramped down and turned off. Instrument is rolled to the nominal East (35156 Engineering Units), and Mirror / Occulter is set at 1.5 Solar Radii with 1.5 mm overocculting. UVCS Aperture Door is open. Internal Mirror / Occulter Heater set to 0% duty cycle. FOT told to continue to use UVCS ESR Limit Table. Expected Limit Violation sheets submitted to FOT via SOC for any expected limit violations during this time. New Business: DAWN spacecraft emergency has caused the loss of DSS-24 pass for 19 February, resulting in a 20 hour, 25 minute gap in contact with SOHO. Decision is made to re-safe UVCS on DSS-54 pass, 19 February. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2009.05.14.15:45 end: 2009.05.15.13:57 ONUMs = 25436 Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 270 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 100 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 210000 - LYA HIGH VOLTAGE RAMPED DOWN AND POWERED OFF - OVI HIGH VOLTAGE RAMPED DOWN AND POWERED OFF - VLD HIGH VOLTAGE RAMPED DOWN AND POWERED OFF - LYA DETECTOR POWERED ON - OVI DETECTOR POWERED OFF - VLD DETECTOR POWERED OFF - LYA mask: LYA_303_8x2 in slot 3 Fits Files: