UVCS MISSION LOG ---------------- Date: 10 March 2006 ----- Last revision: 17 March 2006 (Wu) -------------- File Name: 2006.03.10.a.log ---------- Compiled by: R. Wu ------------ UVCS Activity: UVCS in Modified Hard Safe Configuration -------------- Modify UVCS Hard Safe Configuration UVCS in Modified Hard Safe Configuration SOHO Activity: Received via email Friday, 03 March 2006, -------------- 18:23:57 GMT: 7 March 2006 SK/MM FINAL TIMELINE Last Update: 03 March 18:20 UT Standard Disclaimer: All times are in UT and are estimates. Total Fuel Usage = 0.014825 kg OCD (offpoint flag, SVM times, ESR flags) due 2 Mar 2006 SORR on 3 Mar 2006 18 UT Limit violation sheets for safing due 6 Mar 2006 Friday -- 10 Mar 2006 -------------------------- D43/46 01:45 - 05:45 D63/66 07:35 - 09:15 D24 20:05 - 00:00 LASCO recovery at ~03:30 LASCO load UVCS modifying safe configuration ~21:00 EOF Staff: R. Wu: Lead Scientist ---------- M. Uzzo: Commander Y.-K. Ko Command file: 06.03.10.20:16:49.cmd.log Activity: --------- 1) UVCS in Modified Hard Safe Configuration Sequence: None SCI_SPEC: Following completion of Science Observations, UVCS is placed into a modified Hard Safe configuration in preparation for the SOHO High Gain Antenna Keyhole Period of March 2006. OVI Slit is set to 100 microns, instrument is rolled to nominal North East (30475 Engineering Units) to protect OVI detector electronics. Detector High Voltage is ramped down and then turned off. The Mirror 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 (64). Internal Spectrometer Heater is 0% (255). For the second part of the keyhole for the 23.5 hour gap both OVI and LYA detectors are powered OFF. FOT use ESR Limit Set, and TSU Substitution Heater (Circuit #84) set to 50% duty cycle while both detectors are powered OFF. Experiment Offpoint and ESR Flags disabled for Keyhole. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2006.03.10.17:00 end: 2006.03.10.21:17 ONUMs = 22284 Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 244.3 Degrees (30475) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 100 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 164600 - 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 OFF - VLD DETECTOR POWERED OFF - LYA mask: Star_LYA_6x4 in slot 4 - OVI mask: OVI_JOP175 in slot 5 Fits Files: GAP between 03/10/06|14:00:10( 3862) and 03/10/06|20:07:55( 6424) 2) Modify Hard Safe Configuration Sequence: Manual SCI_SPEC: On DSS-24 pass the Hard Safe configuration was modified following the maneuver and 23.5 hour gap during the SOHO High Gain Antenna Keyhole Period of March 2006. The OVI and LYA detectors are powered ON and the Spectrometer Heater duty cycle is set to approximately 25% (192). Internal Mirror / Occulter Heater still set to 100% duty cycle (64). The FOT continue to use ESR Limit Set, and turn TSU Substitution Heater (Circuit #84) OFF at approximately 21:17 UT. All other settings remain the same. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2006.03.10.21:17 end: 2006.03.10.21:23 ONUMs = 22284 Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 244.3 Degrees (30475) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 100 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 164600 - 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 ON - VLD DETECTOR POWERED OFF - LYA mask: Star_LYA_6x4 in slot 4 - OVI mask: OVI_JOP175 in slot 5 Fits Files: 3) UVCS in Modified Hard Safe Configuration Sequence: None SCI_SPEC: Following completion of Science Observations, UVCS is placed into a modified Hard Safe configuration in preparation for the SOHO High Gain Antenna Keyhole Period of March 2006. OVI Slit is set to 100 microns, instrument is rolled to nominal North East (30475 Engineering Units) to protect OVI detector electronics. Detector High Voltage is ramped down and then turned off. The Mirror 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 (64). Internal Spectrometer Heater is approximately 25% (192). For the last part of the keyhole following the 23.5 hour gap both OVI and LYA detectors are powered ON to provide thermal energy. FOT use ESR Limit Set, and leave TSU Substitution Heater (Circuit #84) OFF while both detectors are powered ON. Experiment Offpoint and ESR Flags disabled for Keyhole. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2006.03.10.21:23 end: 2006.03.11.17:00 ONUMs = 22284 Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 244.3 Degrees (30475) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 100 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 164600 - 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 ON - VLD DETECTOR POWERED OFF - LYA mask: Star_LYA_6x4 in slot 4 - OVI mask: OVI_JOP175 in slot 5 Fits Files: GAP between 03/10/06|23:59:16(12271) and 03/11/06|03:23:28(15500) GAP between 03/11/06|06:04:29(14591) and 03/11/06|08:19:44(11194) GAP between 03/11/06|11:27:36(12859) and 03/11/06|11:28:53(12982)