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ASCA operation status
Dear ASCA users:
In the last several days, we have been bothering by troubles in ground support
equipments for ASCA operation at KSC; one a problem of the cooling system
of the antenna drivers, another problem the power drop of command transponder.
Last night we at last failed to rewrite and update onboard memories for
attitude control parameters. As results, it is certain that we can get
no exposure for EQ PEG (USJ; Pri-B, Linsky) and will get very small amount of
exposure for HCG 94 (ESJ;Pri-A, Voges), assuming that we recover to normal
operation during the time of KSC aquisitions of ASCA in this night.
Next window of EQ Peg starts from November 27 and that of HCG 94 starts from
November 23. I will allocate supplemental observations for those two targets
in late November.
We are working to repaire the degraded equipments and get stable operation
as early as possible. Yet we are forced to operate ASCA under
somehow unstable condition of ground support equipments.
Unfortunately, we ISAS have no dual-line backup system, but a single
dish and single operation system at KSC.
I wish your cooperation for this inconvenience.