SOHO Recovery Updates

On Sunday afternoon we had two more successful telemetry sessions, both with PRTU ON. To preserve resources, the first session was terminated through ground commands after 4 min 15 sec, in the second session telemetry was switched off after 5 min 1 sec. Experts at GSFC, ESA/ESTEC and MMS are analyzing the data. As expected, the spacecraft in general is cold. Of course, some units are warmer than normal. The tank is around 1 deg C, so the hydrazine probably is partially frozen.

Attached you can find temperatures for the PLM units. Those annotated with a star have no meaning (out of sensor measurement range).

Presently we are charging both batteries. As a safety precaution, charging of the batteries has been limited to 45 V.

Propulsion, power, and AOCS experts are expected to arrive at GSFC later this week.

PLM Temperatures on 9 August 1998

MNEMONIC	Limit		Temperature [deg C]

		CDS
		
QTCI1A		10/30		78.57
QTCI1B		10/30		78.57
QTCR1		5/35		1.91
QTCR2		6/30		35.28
QTCR3		6/34		41.92


		CELIAS

QTFI1A		-15/35		42.78
QTFI1B		-15/35		41.91
QTFI2A		-40/40		35.37
QTFI2B		-40/40		34.93
QTFI3A		-15/35		41.91
QTFI3B		-15/35		41.91
QTFR1		5/35		3.35
QTFR2		5/35		3.92
QTFR3		5/35		9.96
QTFR4		7/30		16.74
QTFR5		8/36		-5.65
Q11		5/35		10.54
	

		CEPAC

QTHI1A		10/25		-21.40*
QTHI1B		10/25		-21.40*
QTHI2		-13/21		-21.67
QTHI3		0/30		-19.57
QTHR1		5/35		-11.10
QTHR2		8/31		-4.47
QTHR3		-3/34		-21.40*
QTHR4		4/33		-11.10
QTHR5		5/35		-7.43


		GOLF

QTGI1A		5/40		-21.40*
QTGI1B		5/40		-21.40*
QTGR1		5/35		3.64
QTGR2		10/25		39.39
QTGR3		5/35		40.03


		LASCO/EIT

QTLI1A		5/30		33.19
QTLI1B		5/30		33.62
QTLI2A		10/30		-49.20*
QTLI2B		10/30		-49.20*
QTLI3A		-10/20		-49.20*
QTLI3B		-10/20		-49.20*
QTLR1		5/35		-3.58
QTLR2		5/35		-15.26
QTLR3		5/35		4.21


		MDI

QTMI1A		10/35		-21.40*
QTMI1B		10/35		-21.40*
QTMI1C		10/41		-21.40*
QTMI1D		-105/40		-53.33
QTMI2		0/40		-22.15
QTMR1		5/35		-2.40
QTMR2		5/35		-3.58


		SUMER

QTSI1A		15/27		-21.40*
QTSI1B		15/27		-21.40*
QTSI2A		5/25		-21.40*
QTSI2B		5/25		-21.40*
QTSR1		5/35		-0.96
QTSR2		5/34		-16.27
QTSR3		2/27		-13.98


		SWAN

QTNI1A		5/30		44.45
QTNI1B		5/30		45.71
QTNI2A		5/30		-21.40*
QTNI2B		5/30		-21.40*
QTNR1		5/35		29.34
QTNR2		5/35		-21.40*
QTNR3		6/31		-13.66


		UVCS

QTUI1A		0/40		-5.65
QTUI1B		0/40		-5.36
QTUR1		5/35		-5.06
QTUR2		5/30		37.13


		VIRGO

QTVR1		3/30		-9.50
QTVR2		5/33		-18.83		


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Note: * means: end of sensor measurement range