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

	Date:		16 June 2004
	-----

 	Last revision:	02 July 2004 (Wu)
	--------------

	File Name: 	2004.06.30.a.log
	-----------

	Compiled by:	M. Uzzo, R. Wu
	------------

	UVCS Activity:	UVCS in Modified Hard Safe configuration for Keyhole
	--------------	UVCS Recovery from Hard Safe Configuration to Soft
			Safe Configuration
			UVCS in Soft Safe Configuration

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

	EOF Staff:	R. Wu: Lead Scientist
	----------	M. Uzzo: Commander, Planner
			Y.-K. Ko 

	Command file:	04.07.01.12:50:17.cmd.log

	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 Keyhole Period.  

		  Detector High Voltage is ramped down and then turned off, 
		  OVI Slit is set to 100 microns, instrument is rolled to 
		  the nominal East (35156 Engineering Units), and 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.  Internal
		  Spectrometer Heater is not turned on.  In addition to
		  "traditional" Hard Safe configuration, all UVCS 
		  detectors are powered off.

		  FOT use ESR Limit Table, and turn on TSU Substitution 
		  Heater (Circuit #84) and set duty cycle to default 60%. 
		  Experiment Offpoint, and ESR Flags disabled for Keyhole.

	OBS_PROG: 

	SCI_OBJ:  

	OBJ:      

	CMP_NAME: 

	CMP_NUM:  

	Duration: start: 2004.06.30.17:00
                    end: 2004.07.01.14:08

	ONUMs =	45489

	Instrument configuration:

		- Pointing:  Sun center

		- Spacecraft Roll:  0 Degrees

		- Roll: 90 Degrees (35156)
 
		- Mirror/Occulter:  1.5 Ro
                                    1.5 mm overocculting

		- LYA Slit:    50 um
		- OVI Slit:   100 um 

                - LYA GRTPOS: 128000
                - OVI GRTPOS: 229000

		- LYA HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF
		- OVI HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF
		- VLD HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF

		- LYA DETECTOR POWERED OFF
		- OVI DETECTOR POWERED OFF
		- VLD DETECTOR POWERED OFF

                - OVI mask:   OVI_Syn_230 in slot 1

	Fits Files:


	2) UVCS Recovery from Modified Hard Safe Configuration

	Sequence: Manual

	SCI_SPEC: UVCS is recovered from Hard Safe Configuration into a Soft 
		  Safe configuration in order to allow UVCS temperatures to 
		  return to nominal.  
		  
		  OVI Detector powered on.
		  
		  Detector High Voltage remains ramped down and turned off
		  OVI Slitwidth is 100 microns, instrument is rolled to the 
		  nominal WEST (35156 Engineering Units), and Mirror / 
		  Occulter is set at 1.5 Solar Radii with 1.5 mm 
		  overocculting.  UVCS Aperture Door is opened at this time.
		  Internal Mirror / Occulter Heater Heater set to 0% duty 
		  cycle.  XDL Detector Thresholds set.

		  FOT told to continue to use UVCS ESR Limit Table.

		  Expected Limit Violation sheets submitted to FOT via SOC
		  for any expected limit violations during this time.  

		  Experiment Offpoint and ESR Flags enabled.

	OBS_PROG: 

	SCI_OBJ:  

	OBJ:      

	CMP_NAME: 

	CMP_NUM:  

	Duration: start: 2004.07.01.14:08
                    end: 2004.07.01.14:21

	ONUMs =	45489

	Instrument configuration:

		- Pointing:  Sun center

		- Spacecraft Roll:  0 Degrees

		- Roll: 90 Degrees (35156)
 
		- Mirror/Occulter:  1.5 Ro
                                    1.5 mm overocculting

		- LYA Slit:    50 um
		- OVI Slit:   100 um 

                - LYA GRTPOS: 128000
                - OVI GRTPOS: 229000

		- LYA HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF
		- OVI HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF
		- VLD HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF

		- LYA DETECTOR POWERED OFF
		- VLD DETECTOR POWERED OFF

                - OVI mask:   OVI_Syn_230 in slot 1

	Fits Files:


	3) Thermal Equilibration of UVCS in Soft Safe Configuration

	Sequence: none

	SCI_SPEC: UVCS is recovered from Hard Safe Configuration into a Soft 
		  Safe configuration in order to allow UVCS temperatures to 
		  return to nominal.  
		  
		  Detector High Voltage remains ramped down and turned off
		  OVI Slitwidth is 100 microns, instrument is rolled to the 
		  nominal EAST (35156 Engineering Units), and Mirror / 
		  Occulter is set at 1.5 Solar Radii with 1.5 mm 
		  overocculting.  UVCS Aperture Door is opened at this time.
		  Internal Mirror / Occulter Heater Heater set to 0% duty 
		  cycle.		  

		  FOT told to continue to use UVCS ESR Limit Table.

		  Expected Limit Violation sheets submitted to FOT via SOC
		  for any expected limit violations during this time.  

		  Experiment Offpoint and ESR Flags enabled.

	OBS_PROG: 

	SCI_OBJ:  

	OBJ:      

	CMP_NAME: 

	CMP_NUM:  

	Duration: start: 2004.07.01.14:21
                    end: 2004.07.01.17:00

	ONUMs =	45489

	Instrument configuration:

		- Pointing:  Sun center

		- Spacecraft Roll:  0 Degrees

		- Roll: 90 Degrees (35156)
 
		- Mirror/Occulter:  1.5 Ro
                                    1.5 mm overocculting

		- LYA Slit:    50 um
		- OVI Slit:   100 um 

                - LYA GRTPOS: 128000
                - OVI GRTPOS: 229000

		- LYA HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF
		- OVI HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF
		- VLD HIGH VOLTAGE RAMPED DOWN DOWN AND POWERED OFF

		- LYA DETECTOR POWERED OFF
		- VLD DETECTOR POWERED OFF

                - OVI mask:   OVI_Syn_230 in slot 1

	Fits Files: