UVCS MISSION LOG ---------------- Date: 01 March 2006 ----- Last revision: 10 March 2006 (Wu) -------------- File Name: 2006.03.03.a.log ---------- Compiled by: R. Wu ------------ UVCS Activity: UVCS in Modified Hard Safe Configuration -------------- SOHO Activity: -------------- EOF Staff: R. Wu: Lead Scientist ---------- Y.-K. Ko M. Uzzo Command file: No Commanding 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 50% (128). For the first part of the keyhole prior to 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: 2006.03.03.17:00 end: 2006.03.04.17:00 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 03/03/06|12:04:42( 7375) and 03/03/06|18:31:50(11796)