UVCS MISSION LOG ---------------- Date: 23 December 2008 ----- Last revision: 29 December 2008 (Wu) -------------- File Name: 2008.12.25.a.log ---------- Compiled by: R. Wu ------------ UVCS Activity: OVI Detector Dark Rate Diagnostic for 25 December 2008 -------------- South Polar Coronal Hole OVI Observation for 25 - 26 December 2008 SOHO Activity: -------------- EOF Staff: M. P. Miralles: Lead Scientist ---------- R. Wu: Commander M. Uzzo: Planner Command file: 08.12.23.15:11:00.cmd.log Activity: --------- 1) OVI Detector Dark Rate Diagnostic Sequence: OVI_dark_chk.tcl SCI_SPEC: Determine Dark count rate for OVI detector. Instrument rolled to coronal hole, 5.0 Ro with 0.8 mm exposed mirror. Script engages OVI filter and then disengages it at end. Note: New Nominal OVI MCP Voltage = 205 OBS_PROG: Calibration SCI_OBJ: Calibration OBJ: Coronal Hole CMP_NAME: CMP_NUM: Duration: start: 2008.11.25.15:19 end: 2008.11.25.16:20 ONUMs = 25021 (12 exps) Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 180 Degrees (18762) - Mirror/Occulter: 5.0 Ro 1.5 mm overocculting - LYA Slit: 100 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 210000 - OVI Filter Engaged - OVI MCP Voltage: 205 (Nominal) - OVI mask: OVI_chk_1xfull in slot 6 Fits Files: q08.12.25.15:19:01.ovi.dat 2) South Polar Coronal Hole Observations Sequence: 08.11_hole.tcl, n = 8, m = 1, p = 0, r = 1, e = 0 SCI_SPEC: Characterization of a polar coronal hole. Goal is to measure the properties of a polar coronal hole. In particular we are interested in the coronal conditions (intensities and line widths for HI Ly-alpha and OVI 1032/1037) as a function of height and latitude. We will compare these properties with the ones found in non-polar coronal holes. Roll positions are VL-corrected for PA=180 degrees. Note: New Nominal OVI MCP Voltage = 205 OBS_PROG: Primary: Sensitivity Sub Obj: Spatial Coverage SCI_OBJ: Plasma Properties...Proton and Ion Temperatures OBJ: Coronal Hole CMP_NAME: CMP_NUM: Duration: start: 2008.11.25.16:22 end: 2008.11.26.15:23 ONUMs = 25022 (320 exps) 25023 (348 exps) Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 180 Degrees - Roll: 174.38 Degrees (17739) - Mirror/Occulter: 2.4 Ro 1.5 mm overocculting - LYA Slit: 100 um - OVI Slit: 100 um - LYA GRTPOS: 100000 - OVI GRTPOS: 223500 - OVI MCP Voltage: 205 (Nominal) - OVI mask: OVI_EclipSyn_215 in slot 2 Fits Files: q08.12.25.16:22:08.ovi.dat q08.12.26.03:23:28.ovi.dat