UVCS MISSION LOG ---------------- Date: 01 April 2005 ----- Last revision: 01 April 2005 (Wu) -------------- File Name: 2005.03.10.a.log ---------- Compiled by: M. Uzzo, R. Wu ------------ UVCS Activity: Place UVCS into Modified Hard Safe Configuration -------------- UVCS in Modified Hard Safe configuration for Keyhole SOHO Activity: -------------- EOF Staff: R. Wu: Lead Scientist ---------- M. Uzzo: Commander, Planner Y.-K. Ko Command file: No Commanding Activity: --------- 1) Place UVCS in Modified Hard Safe Configuration Sequence: Manual SCI_SPEC: Following completion of Science Observations, UVCS is placed into a modified Hard Safe configuration in preparation for the SOHO Keyhole Period. Detector High Voltage is ramped down and then turned off, OVI Slit is set to 100 microns, instrument is rolled to the nominal East (35156 Engineering Units), and 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. Internal Spectrometer Heater is not turned on. In addition to "traditional" Hard Safe configuration, all UVCS detectors are powered off. FOT use ESR Limit Table, and turn on TSU Substitution Heater (Circuit #84) and set duty cycle to 50%. Experiment Offpoint, and ESR Flags disabled for Keyhole. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2005.03.10.12:31 end: 2005.03.10.12:59 ONUMs = 22203 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: 223500 - 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 - OVI mask: OVI_str_164_225 in slot 6 Fits Files: 2) UVCS in Modified Hard Safe Configuration Sequence: SCI_SPEC: Following completion of Science Observations, UVCS is placed into a modified Hard Safe configuration in preparation for the SOHO Keyhole Period. Detector High Voltage is ramped down and then turned off, OVI Slit is set to 100 microns, instrument is rolled to the nominal East (35156 Engineering Units), and 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. Internal Spectrometer Heater is not turned on. In addition to "traditional" Hard Safe configuration, all UVCS Detector Power are turned off. FOT use ESR Limit Table, TSU Substitution Heater (Circuit #84) powered on. Experiment Offpoint, and ESR Flags disabled for Keyhole. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2005.03.10.12:59 end: 2005.03.11.17:00 ONUMs = 22203 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: 223500 - 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 - OVI mask: OVI_str_164_225 in slot 6 Fits Files: