This tool is meant to assist mission planners and guest observers in determining the best time to observe targets. It reads a 12-month ephemeris file and creates output listing the predicted observing efficiency and sun angle. This ephemeris is good for one year from its creation date, and there are two updates per year, in December and June.

The RXTE SOF does not guarantee that objects will always be scheduled during the week of peak efficiency, due to Targets of Opportunity and coordinated observations.

Dates outside the Ephemeris ranges below will give unpredictable results!!!

Ephemeris Files available

Ephemeris file	Start Time(Local Time)	End Time(Local Time)	Interval(minutes)
/home/mosaic/htdocs/cgi-bin/X2003305XLNG.02.out	November 1, 2003 00:00	March 2, 2005 00:00	10
/home/mosaic/htdocs/cgi-bin/X2004236XLNG.01.out	March 1, 2005 00:00	March 2, 2006 00:00	10
/home/mosaic/htdocs/cgi-bin/X2006060XEPHYR.01.out	March 1, 2006 10:00	March 1, 2007 00:00	10

Please select an Ephemeris file: X2006060XEPHYR.01.outX2004236XLNG.01.outX2003305XLNG.02.out

Starting Date: (format is DDMMYYYY)

RA: (J2000, decimal deg)

Dec: (J2000, decimal deg)

Number of months after starting date to report: (max and default = 12)

Resolution(d=Daily, w=Weekly):

Due to the nature of this utility, the program will not display results until it has finished running. This program will take between 60 and 600 seconds. It will run faster if you select fewer months to report.