This page (revision-8) was last changed on 07-Dec-2016 14:14 by Peter Young

This page was created on 31-Jan-2013 01:04 by Peter Young

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
8 07-Dec-2016 14:14 4 KB Peter Young to previous
7 08-Apr-2013 15:51 4 KB Peter Young to previous | to last
6 01-Feb-2013 22:39 4 KB Peter Young to previous | to last
5 01-Feb-2013 22:29 4 KB Peter Young to previous | to last
4 01-Feb-2013 22:08 4 KB Peter Young to previous | to last
3 01-Feb-2013 22:01 4 KB Peter Young to previous | to last
2 01-Feb-2013 21:32 4 KB Peter Young to previous | to last
1 31-Jan-2013 01:04 3 KB Peter Young to last

Page References

Incoming links Outgoing links
IRISTechnical...nobody
IRISTechnical

Version management

Difference between version and

At line 1 added 2 lines
[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
At line 3 changed one line
%%(color:red;)__WARNING__%%: the information given below was obtained from notes taken by Peter Young at an IRIS meeting, and it may not be up-to-date or accurate.
%%(color:red;)__WARNING__%%: the information given below was obtained from notes taken by Peter Young at an IRIS meeting in January 2013, and it may not be up-to-date or accurate.
At line 9 added 2 lines
IRIS will be launched on %%strike 28 April 2013/% %%strike sometime in May/% 26 June 2013. The commissioning phase will last about 30 days, and then the 30 day science plan will start.
At line 9 changed one line
The slitjaw imager has a single CCD and a filter wheel. The filter wheel is used to select C II, Si IV and Mg II line core and wing (four filters). The FOV is 175" x 175".
The slitjaw imager has a single CCD and a filter wheel. The filter wheel is used to select C II, Si IV and Mg II line core and wing (four filters). The FOV is 175" x 175". Note that images and spectra will be obtained simultaneously.
At line 15 removed one line
The spacecraft can roll from -90 to +90 degrees, thus allowing the slit to be pointed at any angle. The default slit position will be north-south. At certain times of year certain roll angles are not allowed based on the position of the Moon. The roll angles that are ruled out are between 60 and 90 degrees.
At line 17 removed one line
Any pointing up to 4 arcmin off-limb is allowed.
At line 25 changed one line
!!Instrument "features"
!!Pointing
At line 29 added 13 lines
Any pointing up to 4 arcmin off-limb is allowed.
The guide telescope has a an offset relative to the main telescope and it varies with temperature. An offset look-up table will be used to make sure the telescope pointing is correct.
The spacecraft can roll from -90 to +90 degrees, thus allowing the slit to be pointed at any angle. The default slit position will be north-south. At certain times of year certain roll angles are not allowed based on the position of the Moon. The roll angles that are ruled out are between 60 and 90 degrees. The roll is performed by using a star tracker.
For feature tracking, the PZT mechanism (mirror tip-tilt used for rastering) will be used to track a solar feature across the field-of-view. When the feature reaches the edge of the field of view, the telescope will be re-pointed. This jump will not be completely accurate, leading to a jump in the position of the feature.
!!Instrumental features
At line 33 removed one line
The guide telescope has a an offset relative to the main telescope and it varies with temperature. There is also a star tracker that is used for getting the spacecraft roll
At line 41 changed one line
The slit spectra show intensity variations along the slit (due to non-uniform slit width?). Burn-in of the emission lines is expected.
The slit spectra show intensity variations along the slit (due to non-uniform slit width?). Burn-in of the emission lines with time is expected.
This page (revision-8) was last changed on 07-Dec-2016 14:14 by Peter YoungTop