Level 0 (Uncalibrated SOT-FG Data)
SOT-FG Observing Modes, GenIDs, and ObsIDs
SOT-FG data are contained in self-describing FITS files. The filenames have
the format <Mode>YYYYMMDD_HHMMSS.S.fits, where <Mode> is a string that
identifies the FG observing mode. The remainder of the filename is the
timestamp at which the image(s) were taken. The processing level is
identified by the DATA_LEV keyword in the FITS header.
Files associated with simple filtergrams, or on-board processed Dopplergram or magnetogram data, typically contain single images (i.e., two dimensional arrays), whereas files associated with multiple Stokes parameters contain multiple image (i.e., three-dimensional arrays).
The table below lists all SOT observing modes that are found in the files in the SOT-FG archive. (Please note that there are several files in the SOT-FG archive containing images taken prior to the opening of the SOT door on 2006 October 25. The images taken in the few days after the door opened did not have the image stabilization system engaged.)
The "GenID", "ObsID", and "String Description" columns of the table represent
the values of the GEN_ID, OBS_ID, and OBS_TYPE keywords found in the
FITS headers of files in the SOT-FG archive, and together identify the
particulars of the observing mode. (ObsIDs that were never used in flight do
not appear in the table.) Most GenIDs are associated with multiple
ObsIDs. Additionally, modes FGDG and FGMG are associated with multiple
GenIDs. GenIDs with an asterisk appear in very few files, and are referenced
in the list of notes following the table.
| Mode | GenID | ObsID(s) | String Description | Description |
|---|---|---|---|---|
FG | 1 | 1, 22, 24, 26, 71 | FG (simple) | basic filtergram |
FGIV | 2 | 2, 40, 41, 42, 61, 62, 63, 64, 65, 66, 67 | FG shuttered I and V | Stokes \(IV\) images |
FGIQUV | 3 | 3, 57, 59, 60, 68, 69, 70, 76, 77 | FG shuttered Stokes | Stokes \(IQUV\) images |
FGMG | 4 | 4, 83, 85 | FG MG4 V/I | magnetogram (Stokes \(V/I\) image), summed 4×4 |
FGMG | 5* | 5 | FG MG4 V and I | Stokes \(I\) and Dopplergram images, summed 4×4 |
FGMG | 6 | 81, 82, 84 | FG MG2 V/I | magnetogram (Stokes \(V/I\) image), summed 2×2 |
FGMG | 7 | 73 | FG MG2 V and I | Stokes \(I\) and Dopplergram images, summed 2×2 |
FGMG | 8 | 88, 89 | FG MG1 V/I | magnetogram (Stokes \(V/I\) image) |
FGDG | 9 | 78, 79, 80 | FG DG4 vel | Dopplergram image, summed 4×4 |
FGDG | 10* | 10 | FG DG4 2v | Dopplergram image, summed 4×4 |
FGDG | 11* | 11 | FG DG2 | Dopplergram image, summed 2×2 |
FGFOCUS | 12 | 12 | FG focus scan | one filtergram of a set of filtergrams, each having different focus settings |
FGIVDG | 18 | 86, 87 | FG shuttered IV+DG | Stokes \(IV\) and Dopplergram images |
FGSIV | 32 | 32, 44 | FG shutterless I and V | Stokes \(IV\) images |
FGSIQUV | 33 | 33, 43, 54 | FG shutterless Stokes | Stokes \(IQUV\) images |
FGSIQ | 34* | 34 | FG shutterless I and Q | Stokes \(IQ\) images |
FGSIUV | 36* | 36 | FG shutterless IUV | Stokes \(IUV\) images |
FGSIV200 | 38 | 38, 55 | FG shutterless I and V with 0.2s intervals | shutterless Stokes \(IV\) images |
FGSIV100 | 39 | 39, 56 | FG shutterless I and V with 0.1s intervals | shutterless Stokes \(IV\) images |
Notes regarding the above table:
-
The SOT-FG data archive contains only two files having mode
FGMGwith GenID=5. These images were taken before the SOT door had opened. -
The SOT-FG data archive contains only one file having mode
FGDGwith GenID=10. This image was taken before the SOT door had opened. -
The SOT-FG data archive contains only two files having mode
FGDGwith GenID=11. These images were taken on 2008 March 3 as part of a test. -
The SOT-FG data archive contains only 12 files having mode
FGSIQwith GenID=34. These images were taken on 2008 May 3 as part of a test. -
The SOT-FG data archive contains only 12 files having mode
FGSIUVwith GenID=36. These images were taken on 2008 May 3 as part of a test.