obsid   target                  start time      int time    inst    ccd     grat    drop rate(%)
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5162	Cas_A[I3,-120,-     	75:78079.699		 2.0	ACIS-I	I6		NONE	4.6
5163	Cas_A[S3,-120,-     	75:81766.244		 2.0	ACIS-S	S6		NONE	7.7
5155	Cas_A[I3,-120,-     	303:14578.962		 2.2	ACIS-I	I6		NONE	4.6
5156	Cas_A[S3,-120,-     	303:18528.005		 2.0	ACIS-S	S6		NONE	9.5