Hinode Yohkoh Hinotori Trace Rhessi


HINODE SOT-SP Level-2 data

SOT-SP Level-2 data is the vector (three-component) magnetograms and a set of related variables. They are outputs from spectral line inversions using the HAO "MERLIN" inversion code developed under the Community Spectro-polarimetric Analysis Center (CSAC) initiative. Each Level 2 dataset is stored in a FITS file containing 42 extensions, one per inversion parameter or ancillary data product. These FITS files are stored grouped into directories for each commanded SP operation.

The Level 2 FITS extensions are organized as follows:

Extension Quantity
1 Magnetic field strength
2 Magnetic field inclination angle, in [0°, 180°]
3 Magnetic field azimuth angle, in [0°, 180°]
4 Doppler shift of 6301.5 Å line
5 Doppler shift of 6302.5 Å line
6 Doppler width
7 Line strength
8 Damping parameter
9 Source function
10 Source function gradient
11 Macroturbulence
12 Stray light fraction
13 Stray light shift
14 Magnetic field strength error
15 Magnetic field inclination error
16 Magnetic field azimuth error
17 Doppler shift error of 6301.5 Å line
18 Doppler shift error of 6302.5 Å line
19 Doppler width error
20 Line strength error
21 Damping parameter error
22 Source function error
23 Source function gradient error
24 Macroturbulence error
25 Stray light fraction error
26 Stray light shift error
27 χ2 for Stokes I
28 χ2 for Stokes Q
29 χ2 for Stokes U
30 χ2 for Stokes V
31 Total χ2
32 Continuum intensity
33 Original continuum intensity
34 Polarization degree
35 Magnitude of Stokes V
36 Final status of inversion
37 Number of iterations
38 x coordinate (at each slit position)
39 y coordinate (at each slit position)
40 Observation time (at each slit position)
41 Mechanical slit position
42 Scattered light profile

Please see also the general description of Level-2 data and a more detailed description at HAO and LMSAL.

Data archives

Last Modified: 04 July 2022