This page (revision-10) was last changed on 07-Dec-2016 14:14 by David R Williams

This page was created on 15-Oct-2007 06:25 by David R Williams

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Page References

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InterInstrumentOffsets
InterInstrumentOffsets

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At line 1 removed 2 lines
[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
At line 7 changed one line
[Ken Dere|~KenDere] asked a fairly important question (comment moved here from [DataProAnalysis] ) :
[Ken Dere|~KenDere] asked a fairly important question (commend moved here from [DataProAnalysis] ) :
At line 13 changed one line
The rough number that we use here is that EIS's FOV centre is 50 arcseconds south of SOT's centre (assuming that they don't offset internally, though perhaps this is carried through their FITS files, as ours should be). Incidentally, space-craft centre is __defined__ so that it coincides with SOT FOV centre.
The rough number that we use here is that EIS's FOV centre is 50" below SOT's centre (assuming that they don't offset internally, though perhaps this is carried through their FITS files, as ours should be).
At line 15 changed one line
We assume that the telescope FOVs are co-centred in the east-west direction.
We assume that the telescope FOVs are co-centred in X.
At line 17 changed one line
These values are based on the alignment work done by Hiro Hara in February of this year, after the EIS coarse mirror was moved (it has only been moved once since science observations began).
--[Dave|DaveWilliams], 15-Oct-2007
At line 19 removed 6 lines
I have included an image taken from Hiro's slide presentation on this subject (larger image also attached).
[InterInstrumentOffsets/HH_Offsets_Feb07small.png]\\\
You can see the inter-instrument offsets. Note that although EIS's centre is measured to be 3" west of SOT's, the difference is so small that we assume it to be zero.
At line 27 changed 3 lines
As you can also see from the above image, XRT is centred about 43 arcseconds east of EIS, and 28 arcseconds north.
--[Dave Williams|~DavidRWilliams], 15-Oct-2007
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This page (revision-10) was last changed on 07-Dec-2016 14:14 by David R WilliamsTop