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

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At line 15 added 12 lines
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!! EIS Pointing Jitter
Following on from what was mentioned at the EIS UK meeting in June...
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.
This page (revision-7) was last changed on 18-Apr-2021 19:18 by MichaelMarshTop