UVCS MISSION LOG
                                ----------------

        Date:           26 Apr 2011
        -----

        Last revision:  8 Aug 2011 (RR)
        --------------

        File Name:      2011.04.26.a.log
        ----------

        Compiled by:    R. Rosati
        ------------

        UVCS Activity:  Turn off OVI detector 
	--------------	Turn on and ramp up LYA detector
			Conduct LYA Stimulus Pulse Test
			Conduct LYA detector dark rate diagnostic
			Load Suprathermal Seed Particle Population Observation


        SOHO Activity:    
        --------------

        EOF Staff:      A. Panasyuk: Lead Scientist
        ----------      R. Rosati: Commander


        Command file:   11.04.26.16:54:38.cmd.log


        Activity:
        ---------

        1) LYA detector turn on, LYA Stimulus Pulse Test conducted, HV ramped up 
   
        Sequence: Manual, TakeLYA_TxN 120 2

        SCI_SPEC: After OVI detector turned off, the LYA detector is turned on
                  and a stimulus pulse test is completed
                  

        OBS_PROG:


        SCI_OBJ:



        OBJ:

        CMP_NAME: 

        CMP_NUM:  

        Duration: start: 2011.04.26.12:59
                    end: 2011.04.26.13:41


        ONUMs = 26978 (2 exps)

        Instrument configuration:

                - Pointing:  Sun center

                - Spacecraft Roll:  180 Degrees

                - Roll: -87.7 Degrees (51119)

                - Mirror/Occulter:  5.0 Ro
                                    2.37 mm exposed mirror


                - LYA Slit:   50 um
                - OVI Slit:   50 um 

                - LYA GRTPOS: 83040
                - OVI GRTPOS: 98000

                - LYA MCP Voltage: 0

                - LYA mask: LYA_wing_100 in slot 5

        Fits Files:

q11.04.26.15:40:34.lya.dat




        2) LYA Detector Dark Rate Diagnostic
   
        Sequence: LYA_dark_chk 26979 50916

        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.

        OBS_PROG: Calibration


        SCI_OBJ:  Calibration



        OBJ:    Coronal Hole

        CMP_NAME: 

        CMP_NUM:  

        Duration: start: 2011.04.26.16:24
                    end: 2011.04.26.17:25

        ONUMs = 26979 (12 exps)

        Instrument configuration:

                - Pointing:  Sun center

                - Spacecraft Roll:  180 Degrees

                - Roll: -86.5 Degrees (50916)

                - Mirror/Occulter:  5.0 Ro
                                    0.8 mm exposed mirror


                - LYA Slit:   50 um
                - OVI Slit:   50 um 

                - LYA GRTPOS: 83040
                - OVI GRTPOS: 98000

                - LYA Filter Engaged

                - LYA MCP Voltage: 210

                - LYA mask: LYA_chk_1xfull in slot 6

        Fits Files:

q11.04.26.16:23:52.lya.dat




        3) Suprathermal Seed Particle Measurement. Script modified to
	   point at 1.8 Rsun while occulter is set to a position
	   corresponding to 0 mm overocculting for a mirror position of
	   1.5 Rsun.
   
        Sequence: Seed 26980 18085 17 10 0 0 0

        SCI_SPEC: 

        OBS_PROG: Primary: Spectral Resolution
                  Sub_Obj: Sensitivity


        SCI_OBJ:  Primary: Plasma Properties...Density
                  Sub_Obj: Plasma Properties...Proton Temperature



        OBJ:      Coronal Hole

        CMP_NAME: 

        CMP_NUM:  

        Duration: start: 2011.04.26.14:53
                    end: 2011.04.29.10:27

        ONUMs = 26980 (84 exps)
                26981 (39 exps)
                26982 (73 exps)
                26983 (86 exps)
                26984 (46 exps)


        Instrument configuration:

                - Pointing:  Sun center

                - Spacecraft Roll:  180 Degrees

                - Roll: 93.7 Degrees (18085)

                - Mirror/Occulter:  1.8 Ro
                                    0 mm overocculting for 1.5 Ro


                - LYA Slit:   50 um
                - OVI Slit:   50 um 

                - LYA GRTPOS: 83040
                - OVI GRTPOS: 98000

                - LYA MCP Voltage: 210

                - LYA mask: LYA_wing_100 in slot 5


        Fits Files:

q11.04.26.18:53:19.lya.dat
q11.04.27.08:23:59.lya.dat
q11.04.27.21:54:39.lya.dat
q11.04.28.11:25:19.lya.dat
q11.04.29.00:55:59.lya.dat