UVCS MISSION LOG ---------------- Date: 6 Aug 2012 ----- Last revision: 28 Jan 2013 (RR) -------------- File Name: 2012.08.06.a.log ---------- Compiled by: R. Rosati ------------ UVCS Activity: Attempting to free Lya grating that has become stuck -------------- while trying to move the 1216 A line from pixel 750 to pixel 825. We will check Lya grating mechanism by turning off mechanism power and make an observation while mech power is off to see if the Lya grating moves to its equilibrium postion. SOHO Activity: -------------- EOF Staff: R. Rosati: Commander ---------- Command file: 12.08.06.16:06:36.cmd.log Activity: --------- 1) Turn mechanism (mech) power off. Take a few Lya exposures while mech power is off to see if Lya grating moves to its equlibrium position. Examination of the exposure data showed that the grating did not move from the vicinity of pixel 750 while mech power was off. Sequence: Manual, TakeLYAexp 0 2 0 SCI_SPEC: OBS_PROG: Calibration SCI_OBJ: Calibration OBJ: Streamer CMP_NAME: CMP_NUM: Duration: start: 2012.08.06.14:00 end: 2012.08.06.14:50 ONUMs = 27511 (16 exps) Instrument configuration: - Pointing: Sun center - Spacecraft Roll: 0 Degrees - Roll: 20.0 Degrees (31513) - Mirror/Occulter: 2.2 Ro 1.5 mm overocculting - LYA Slit: 50 um - OVI Slit: 50 um - LYA GRTPOS: 68580 - OVI GRTPOS: 98000 - LyA MCP Voltage: 210 - LyA mask: Fits Files: q12.08.06.14:05:47.lya.dat