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

	Date:		28 April 2004
	-----

 	Last revision:	06 july 2004 (Wu)
	--------------

	File Name: 	2004.04.28.a.log
	-----------

	Compiled by:	M. Uzzo
	------------

	UVCS Activity:	First half of UVCS recovery from Safe Mode due to 
	--------------	SOHO ESR to Soft Safe Configuration
			UVCS Stimulus Pulse Test
			UVCS Thermal Equilibration in Soft Safe Configuration
			with VLD detector powered off

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

	EOF Staff:	L. Strachan: Lead Scientist
	----------	M. Uzzo: Planner, Commander
			Y.-K. Ko

	Command file:	04.04.28.13:55:24.cmd.log

	Activity:
	---------

	1) UVCS Recovery from ESR Safe to Soft Safe Configuration

	Sequence: Manual

	SCI_SPEC: Following completion of SOHO ESR Recovery, Roll Manuever, 
		  Momentum Mangement, and Station Keeping for 27 April 2004, 
		  UVCS is recovered from ESR 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 Wast (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.
		  Experiment Offpoint and ESR Flags enabled.

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

		  
	OBS_PROG: 

	SCI_OBJ:  

	OBJ:      

	CMP_NAME: 

	CMP_NUM:  

	Duration: start: 2004.04.28.16:00
                    end: 2004.04.28.16:30

	ONUMs =	21147

	Instrument configuration:

		- Pointing:  Sun center

		- Spacecraft Roll:  0 Degrees

		- Roll: 270 Degrees (35156)
 
		- Mirror/Occulter:  1.5 Ro
                                    1.5 mm overocculting

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

		- LYA GRTPOS: 128000
		- OVI GRTPOS: 188310

		- LYA HIGH VOLTAGE POWERED OFF
		- OVI HIGH VOLTAGE POWERED OFF
		- VLD HIGH VOLTAGE POWERED OFF

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

		- OVI mask:   OVI_str_188_225 in slot 5

	Fits Files:

q04.04.21.04:34:53.ovi.dat

	2) UVCS Stimulus Pulse Test

	Sequence: Manual

	SCI_SPEC: 

	OBS_PROG: 

	SCI_OBJ:  

	OBJ:     

	CMP_NAME:

	CMP_NUM:

	Duration: start: 2004.04.28.16:30
                    end: 2004.04.28.17:00

	ONUMs =	21148 (2 exps)

	Instrument configuration:

		- Pointing:  Sun center

		- Spacecraft Roll:  0 Degrees

		- Roll: 90 Degrees (35156)

		- Mirror/Occulter: 1.5 Ro 
                  		   1.5 mm overocculting 
 
		- LYA Slits:   50 um
		- OVI Slits:  100 um  

		- LYA GRTPOS: 128000
		- OVI GRTPOS: 188310

		- LYA HIGH VOLTAGE POWERED OFF
		- OVI HIGH VOLTAGE POWERED OFF
		- VLD HIGH VOLTAGE POWERED OFF

		- LYA DETECTOR POWERED OFF
		- VLD DETECTOR POWERED OFF

		- OVI mask:   msk_000303_OVI in slot 3

	Fits Files:

q04.04.28.17:05:47.ovi.dat

	3) UVCS in Soft Safe Configuration

	Sequence: Manual

	SCI_SPEC: Following completion of SOHO ESR Recovery, Roll Manuever, 
		  Momentum Mangement, and Station Keeping for 27 April 2004, 
		  UVCS is recovered from ESR 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 Wast (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.
		  Experiment Offpoint and ESR Flags enabled.

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

	OBS_PROG: 

	SCI_OBJ:  

	OBJ:     

	CMP_NAME:

	CMP_NUM:

	Duration: start: 2004.04.28.17:05
                    end: 2004.04.29.19:23

	ONUMs =	21148 

	Instrument configuration:

		- Pointing:  Sun center

		- Spacecraft Roll:  0 Degrees

		- Roll: 90 Degrees (35156)

		- Mirror/Occulter: 1.5 Ro 
                  		   1.5 mm overocculting 
 
		- LYA Slits:   50 um
		- OVI Slits:  100 um  

		- LYA GRTPOS: 128000
		- OVI GRTPOS: 188310

		- LYA HIGH VOLTAGE POWERED OFF
		- OVI HIGH VOLTAGE POWERED OFF
		- VLD HIGH VOLTAGE POWERED OFF

		- LYA DETECTOR POWERED OFF
		- VLD DETECTOR POWERED OFF

		- OVI mask:   msk_000303_OVI in slot 3

	Fits Files: