UVCS MISSION LOG ---------------- Date: 21 August 2006 ----- Last revision: 05 September 2006 (Wu) -------------- File Name: 2006.09.04.a.log ---------- Compiled by: M. Uzzo, 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 September 2006. OVI and LyA Slits are set to 100 and 75 microns, instrument is rolled to nominal East (35156 Engineering Units). 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). FOT using ESR Limit Set, TSU Substitution Heater (Circuit #84) powered on and set to 50% duty cycle. UVCS removed from Experiment Offpoint and ESR warning lists for Keyhole. OBS_PROG: SCI_OBJ: OBJ: CMP_NAME: CMP_NUM: Duration: start: 2006.09.04.16:00 end: 2006.09.05.16:00 ONUMs = 22721 Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 270 Degrees (35156) - Mirror/Occulter: 1.5 Ro 1.5 mm overocculting - LYA Slit: 75 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 210000 - 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: LYA_100_8x2 in slot 2 - OVI mask: OVI_chk_1xfull in slot 6 Fits Files: GAP between 09/05/06|05:53:45(14360) and 09/05/06|05:54:49(14464) GAP between 09/05/06|06:09:35(15887) and 09/05/06|17:03:11(13140)