This page (revision-7) was last changed on 18-Apr-2021 19:18 by MichaelMarsh

This page was created on 14-Jun-2007 12:02 by PeterYoung

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 18-Apr-2021 19:18 1 KB MichaelMarsh to previous
6 31-Jul-2009 14:01 1 KB MichaelMarsh to previous | to last
5 31-Jul-2009 13:57 1 KB MichaelMarsh to previous | to last
4 31-Jul-2009 13:27 1 KB MichaelMarsh to previous | to last
3 14-Jun-2007 12:04 960 bytes PeterYoung to previous | to last
2 14-Jun-2007 12:03 812 bytes PeterYoung to previous | to last
1 14-Jun-2007 12:02 794 bytes PeterYoung to last

Page References

Incoming links Outgoing links
PointingStability
PointingStability

Version management

Difference between version and

At line 1 removed 2 lines
[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
At line 13 changed one line
''Note that this means sit-and-stare observations with EIS are not recommended!'' It is preferably that you use small rasters (5-10 mirror positions) so that you generate small images that can be cross-correlated with each other.
''Note that this means sit-and-stare observations with EIS are not recommended!''
At line 17 removed 14 lines
----
! EIS Pointing Jitter
Following on from what was mentioned at the EIS UK meeting in July...
Here is an example of the apparent pointing jitter that appears in the y-axis. The effect of the orbital pointing drift appears visible as a slow variation throughout the observations. However, an additional jitter appears as a kind of "sawtooth" oscillation in the y-axis with a period of around 3-4 minutes. This could have a big effect on sit-and-stare Doppler observations, where there is a velocity gradient across the slit.
These pointing offsets were produced by performing a 2D cross-correlation on a Mg VII 278 slot movie, and the x-axis has units of seconds.
[y_cc_offset_r00-02.pdf]
Mike Marsh
This page (revision-7) was last changed on 18-Apr-2021 19:18 by MichaelMarshTop