UVCS MISSION LOG ---------------- Date: 08 July 2003 ----- Last revision: 11 July 2003 (Wu) -------------- File Name: 2003.07.09.a.log ----------- Compiled by: R. Wu ------------ UVCS Activity: UVCS in Modified Hard Safe Configuration at New -------------- Nominal Spacecraft Roll Recovery of UVCS from Modified Hard Safe Configuration to Soft Safe Configuration UVCS Stimulus Pulse Test Thermal Equilibration of UVCS in Soft Safe Configuration SOHO Activity: -------------- EOF Staff: M. Uzzo: Lead Scientist ---------- M. Uzzo: Commander Y.-K. Ko R. Wu Command file: 03.07.09.11:46:51.cmd.log Activity: --------- 1) UVCS in Modified Hard Safe Configuration at New Nominal Roll Sequence: None SCI_SPEC: Following completion of Coronal Jets Study for 24 June 2003, UVCS is placed into a modified Hard Safe configuration in preparation for the SOHO HGA Blackout Period. 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. Internal Spectrometer Heater is not turned on. In addition to "traditional" Hard Safe configuration, UVCS Detector Power is turned off. FOT Monitoring UVCS using ESR Limit Table, TSU Substitution Heater (Circuit #84) and set duty cycle to 60%. Expected Limit Violation sheets submitted to FOT via SOC for any expected limit violations during this time. FOT told to ignore USDR = MOVING condition, but to notify UVCS representative should this condition change for more than two minutes. Experiment Offpoint and ESR Flags enabled. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2003.07.08.13:42 end: 2003.07.09.12:00 ONUMs = 20026 Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 270 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 100 um - LYA GRTPOS: 128000 - OVI GRTPOS: 192000 - 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 DETECTOR POWERED OFF - OVI DETECTOR POWERED OFF - VLD DETECTOR POWERED OFF - LYA mask: LYA_93_1sec in slot 2 - OVI mask: OVI_Syn_192 in slot 2 Fits Files: 2) UVCS Recovery from Modified Hard Safe to Soft Safe Configuration Sequence: Manual SCI_SPEC: Following completion of SOHO ESR Recovery, Roll Manuever, Momentum Mangement, and Station Keeping for 08 July 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 new nominal Wast (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 Heater set to 0% duty cycle. XDL Detector Thresholds set. 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. FOT told to ignore USDR = MOVING condition, but to notify UVCS representative should this condition change for more than two minutes. Experiment Offpoint and ESR Flags enabled. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2003.07.09.12:00 end: 2003.07.09.12:30 ONUMs = 20026 Instrument configuration: - Pointing: Sun Center - Spacecraft Roll: 180 Degrees - Roll: 270 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 100 um - LYA GRTPOS: 128000 - OVI GRTPOS: 192000 - 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_Syn_192 in slot 2 Fits Files: 3) UVCS Stimulus Pulse Test Sequence: Manual SCI_SPEC: OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2003.07.09.12:32 end: 2003.07.09.12:56 ONUMs = 20028 (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 Slits: 50 um - OVI Slits: 150 um - LYA GRTPOS: 128000 - OVI GRTPOS: 192000 - 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 mask: msk_000303 in slot 3 - OVI mask: msk_000303_OVI in slot 3 Fits Files: q03.07.09.12:33:08.lya.dat q03.07.09.12:33:08.ovi.dat 4) UVCS in Soft Safe Configuration Sequence: None SCI_SPEC: Following completion of SOHO ESR Recovery, Roll Manuever, Momentum Mangement, and Station Keeping for 08 July 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 new nominal Wast (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 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. FOT told to ignore USDR = MOVING condition, but to notify UVCS representative should this condition change for more than two minutes. Experiment Offpoint and ESR Flags enabled. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2003.07.09.12:56 end: 2003.07.10.16:20 ONUMs = 20028 Instrument configuration: - Pointing: Sun Center - Spacecraft Roll: 180 Degrees - Roll: 270 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 100 um - LYA GRTPOS: 128000 - OVI GRTPOS: 192000 - 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: msk_000303 in slot 3 - OVI mask: msk_000303_OVI in slot 3 Fits Files: