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

	Date:		06 February 2002
	-----

 	Last revision:	06 February 2002 (Wu)
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	File Name: 	2002.02.05.a.log
	-----------

	Compiled by:	R. Wu
	------------

	UVCS Activity:	UVCS remains powered off until recovery plans can be
        --------------  solidified between SOC, FOT, other Science Teams
        		UVCS Recovery begins at ~ 20:12 UT
        		UVCS in Safe Configuration following Recovery

	SOHO Activity:	(See Below)
	--------------	

	From email from SOC at Wed, 6 Feb 2002 02:05:06 +0000 (GMT):
	------------------------------------------------------------

	Fuel estimate, from Craig Roberts:
	---------------------------------------------------------------
	From an initial look at the Doppler data, the ESR looked as
	follows:

	Through the major portion of the ESR, there was a slow rise in radial
	delta-V that amounted to approx. 0.088 m/sec.  Then there was a rapid 
	rise in radial delta-V over the final 70 or so minutes of the ESR that 
	added a further 0.118 m/sec.  The overall total radial delta-V observed 
	was thus 0.206 m/sec.  (The direction of this radial delta-V is away 
	from Earth because of the dominance of the aft jets 3B, 4B.)  I am 
	modeling the perturbations on the orbit in accord with this 2-stage 
	behavior displayed.

	Assuming a recovery delta-V burn to be performed the morning of the 7th
	(Thursday), my preliminary targeting results show the following:

	- Delta-V = 0.253 m/sec (antiSunward, 1A/2A)
	- Wall Time Duration = 36.7 min (5% duty cycle)
	- Fuel Usage = 0.2758 kg

	Momentum burn perturbations were included in the modeling.
	---------------------------------------------------------------

	Summary of ESR-18 day 1, from Helmut Schweitzer:
	(Note that "instruments ... will be recovered tomorrow" is a bit
	optimistic, from our standpoint. Many instruments have only been
	turned on from a similar state about 2 times during the mission, and
	that was with the relevant personnel present at the EOF).

	------------------------------------------------------------
	The spacecraft is recovered to CRP, the data handling is back to the
	normal branch, TM is in high rate and the pointing is nominal.
	The instruments are still off and will be recovered tomorrow.
	The reason for the reconfiguration is not clear. After TM was back on 
	Feb 5, 04:18, we found the spacecraft in the following condition:

	- DHS on the redundant side
	- AOCS in ESR
	- RF system on the redundant side
	- mainbus current 16A lower than normal
	- all instruments off, all substitution heaters off
	- recorder and antenna box off for no apparent reason
	- thermal control enabled
	- Undervoltage flag of the mainbus voltage set.

	It looks like the mainbus dropped momentarily and many LCL's went into 
	the selfswitch-off at 23.5V.

	With the upload of the gyroless patch, we stopped todays activities and
	the spacecraft will remain in CRP overnight.
	----------------------------------------------------------------

	EOF Staff:	Y.-K. Ko: Lead Scientist, Planner (Science)
	----------	M. Uzzo: Planner (Operations)
			R. Wu

	Command file:	No Commanding

	Activity:
	---------

	1) UVCS Powered Off by as yet Unknown Events

	Sequence: None

	SCI_SPEC: (See Above)  UVCS remains powered off at this time.  Only
		  Low Rate / Spacecraft Telemetry is available.  Only after
		  power on will telemetry received in Medium Rate become 
		  meaningful.

	OBS_PROG: 

	SCI_OBJ:  

	OBJ:      

	CMP_NAME:

	CMP_NUM:

	Duration: start: 2002.02.05.02:39
		    end: 2002.02.06.20:12

	ONUMs = N/A

	Instrument configuration:

		- Pointing:  Sun center

		- Roll: ??

		- Mirror/Occulter: ?.? Ro
 				   ?.? overocculting

		- LYA Slits:   ?? um
		- OVI Slits:   ?? um

		- LYA GRTPOS: ??
		- OVI GRTPOS: ??

		- LYA mask:   ??
		- OVI mask:   ??