UVCS MISSION LOG ---------------- Date: 04 June 2003 ----- Last revision: 05 June 2002 (Wu) -------------- File Name: 2003.06.04.a.log ----------- Compiled by: R. Wu, M. Uzzo ------------ UVCS Activity: Place UVCS into Hard Safe Configuration for SOHO -------------- Offpoint Manuever of 04 June 2003 UVCS in Hard Safe Configuration UVCS Recovery to Soft Safe Configuration UVCS in Soft Safe Configuration SOHO Activity: Received via email from SOC on 30 May 2003 -------------- @ 18:46:33 UT We had the offpoint SORR today and it looks like we will go ahead with the maneuver (unless the Mars Express mission launch slips from Monday until Wednesday). The final experiment timeline is below and also at: http://sohowww.nascom.nasa.gov/soc/offpoint_jun2003 4 JUNE 2003 OFFPOINT TIMELINE ----------------------------- Last Update: 30 May 18:30 UT Standard Disclaimer: All times are in UT and are estimates NOTES: SWAN will be observing in a safe direction during the maneuver UVCS will do star observations before safing EIT will do calibrations during maneuvers TUESDAY -- 3 June 2003 ---------------------- 11:40-00:20 D27 Limit sheets for safing are due by 3pm WEDNESDAY -- 4 June 2003 ------------------------ 02:10-04:15 D34 04:55-16:30 D66 NRT Available 12:00 LASCO safing (~40 minutes) 13:00 CDS safing (~20 minutes) 13:45 SVM Reserved time 14:15 UVCS safing (~45 minutes) 15:30 FOT will begin Profile in NM/RMW script (steps 1-3) FOT will open MDI loop with permission FOT will disable offpoint flag function FOT will disable ESR flag to UVCS, LASCO 16:15-00:25 D16 16:20 FOT will go to SSR record FOT will resume Profile in NM/RMW script (at Step 4) Duration: approximately 4 hours FOT will enable offpoint flag function FOT will close MDI loop with permission FOT will enable ESR flag to UVCS, LASCO FOT will dump the SSR then go to VC2 20:30 NRT available CDS recovery (~15 minutes) UVCS recovery (~1 hour) LASCO recovery (~45 minutes) CDS & LASCO loads EOF Staff: L. Gardner: Lead Scientist ---------- M. Uzzo: Commander Y.-K. Ko R. Wu Command file: 03.06.04.12:31:56.cmd.log Activity: --------- 1) Place UVCS in Hard Safe Configuration Sequence: Manual SCI_SPEC: Following completion of Tau Tau observation for 04 June 2003, UVCS is placed into a Hard Safe configuration in preparation for the SOHO Offpoint Manuever of 04 June 2003. Detector High Voltage is then ramped down and turned off, OVI Slit is closed from 150 microns to 100 microns, instrument is rolled to the nominal East (35156 Engineering Units), and Mirror / Occulter is moved to 1.5 Solar Radii with 1.5 mm overocculting. UVCS Aperture Door is also closed 708 steps, Internal Mirror / Occulter Heater set to 100% duty cycle, and Internal Spectrometer Heater set to 60% duty cycle. Expected Limit Violation sheets submitted to FOT via SOC for any expected limit violations during this time. FOT additionally told to use UVCS Hard Safe (or "Door Closed") Limit Table, and to ignore glitching UTMTLMON mnemonic. Experiment Offpoint, and ESR Flags disabled for Manuever. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2003.06.04.14:11 end: 2003.06.04.14:56 ONUMs = 19924 Instrument configuration: - Pointing: Sun center - Roll: 90 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 100 um - LYA GRTPOS: 128000 - OVI GRTPOS: 175604 - LYA HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - OVI HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - VLD HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - LYA mask: LYA_93_1sec in slot 2 - OVI mask: OVI_str_175 in slot 1 Fits Files: 2) UVCS in Hard Safe Configuration Sequence: None SCI_SPEC: Following completion of Tau Tau observation for 04 June 2003, UVCS is placed into a Hard Safe configuration in preparation for the SOHO Offpoint Manuever of 04 June 2003. Detector High Voltage is then ramped down and turned off, OVI Slitwidth is 100 microns, 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 also closed 708 steps, Internal Mirror / Occulter Heater set to 100% duty cycle, and Internal Spectrometer Heater set to 60% duty cycle. Expected Limit Violation sheets submitted to FOT via SOC for any expected limit violations during this time. FOT using UVCS Hard Safe (or "Door Closed") Limit Table, and told to ignore glitching UTMTLTDC mnemonic (already ignoring UTMTLMON). Experiment Offpoint, and ESR Flags disabled for Manuever. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2003.06.04.14:56 end: 2003.06.04.21:20 ONUMs = 19924 Instrument configuration: - Pointing: +/- 2 degrees about SOHO Z-axis - Roll: 90 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 100 um - LYA GRTPOS: 128000 - OVI GRTPOS: 175604 - LYA HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - OVI HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - VLD HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - LYA mask: LYA_93_1sec in slot 2 - OVI mask: OVI_str_175 in slot 1 Fits Files: 3) UVCS Recovery from Hard Safe to Soft Safe Configuration Sequence: Manual SCI_SPEC: Following completion of SOHO Offpoint Manuever for 04 June 2003, 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 OVI Slitwidth is 100 microns, 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 opened at this time. Internal Mirror / Occulter Heater and Internal Spectrometer Heater set to 0% duty cycle. Expected Limit Violation sheets submitted to FOT via SOC for any expected limit violations during this time. FOT told to use UVCS Hard Safe (or "Door Closed") Limit Table and told to continue to ignore glitching UTMTLTDC and UTMTLMON mnemonics until full recovery tomorrow. Experiment Offpoint and ESR Flags enabled prior to recovery. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2003.06.04.21:20 end: 2003.06.04.21:32 ONUMs = 19924 Instrument configuration: - Pointing: Sun Center - Roll: 90 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 100 um - LYA GRTPOS: 128000 - OVI GRTPOS: 175604 - LYA HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - OVI HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - VLD HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - LYA mask: LYA_93_1sec in slot 2 - OVI mask: OVI_str_175 in slot 1 Fits Files: 4) UVCS in Soft Safe Configuration Sequence: None SCI_SPEC: Following completion of SOHO Offpoint Manuever for 04 June 2003, 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 OVI Slitwidth is 100 microns, 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 and Internal Spectrometer Heater set to 0% duty cycle. Expected Limit Violation sheets submitted to FOT via SOC for any expected limit violations during this time. FOT told to use UVCS Hard Safe (or "Door Closed") Limit Table and told to continue to ignore glitching UTMTLTDC and UTMTLMON mnemonics until full recovery tomorrow. Experiment Offpoint and ESR Flags enabled prior to recovery. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2003.06.04.21:32 end: 2003.06.05.12:40 ONUMs = 19924 Instrument configuration: - Pointing: Sun Center - Roll: 90 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 100 um - LYA GRTPOS: 128000 - OVI GRTPOS: 175604 - LYA HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - OVI HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - VLD HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF - LYA mask: LYA_93_1sec in slot 2 - OVI mask: OVI_str_175 in slot 1 Fits Files: