obsid   target                  start time      int time    inst    ccd     grat    drop rate(%)
-----------------------------------------------------------------------------------------------------------
17022	SDSS_J0936+0046     	75:49397.484		 3.1	ACIS-S	S3		NONE	15.9
17235	GRB150616A          	175:27374.220		15.0	ACIS-S	I6		NONE	13.3