This page (revision-7) was last changed on 07-Dec-2016 14:14 by David R Williams

This page was created on 16-May-2007 13:04 by David R Williams

Only authorized users are allowed to rename pages.

Only authorized users are allowed to delete pages.

Page revision history

Version Date Modified Size Author Changes ... Change note
7 07-Dec-2016 14:14 3 KB David R Williams to previous
6 11-May-2010 12:39 3 KB David R Williams to previous | to last
5 16-Mar-2010 15:38 3 KB PeterYoung to previous | to last
4 19-May-2009 11:31 2 KB David R Williams to previous | to last
3 16-May-2007 13:14 2 KB David R Williams to previous | to last
2 16-May-2007 13:12 2 KB David R Williams to previous | to last
1 16-May-2007 13:04 1 KB David R Williams to last

Page References

Incoming links Outgoing links
EclipseEffects
EclipseEffects

Version management

Difference between version and

At line 1 added 2 lines
[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
At line 20 added 8 lines
!3. How much time is available for observing during eclipse season?
The eclipses have their maximum duration around 20 June each year. The EIS CO is provided with the times for "X-ray twilight" each orbit and, for 20 June 2009, the duration of XRT twilight was 30 minutes. The guideline for EIS COs is to schedule the next observation no less than 2 minutes after exiting XRT twilight. (N.B. This is now factored into the planning tool buffers which allow observing windows to be calculated).
There is also often minimal overlap with SAA passes, though, which also curtail the useful observing time. There is more information at [SbandObservingInfo] on this, but the minimum useful duration is as small as 44 minutes, and as large as 62 minutes outside the SAA-free "Golden Period", and 65 minutes during the Golden period.
See [the discussion on this|SbandObservingInfo] for more details.
This page (revision-7) was last changed on 07-Dec-2016 14:14 by David R WilliamsTop