CLASP1 Data Access via the VSO

Chromospheric LAyer SpectroPolarimeter (CLASP1)

September 3rd 2015


CLASP, the Chromospheric LAyer SpectroPolarimeter, is a sounding rocket instrument providing polarization measurements of ultraviolet light emitted from the sun's atmosphere. Flight data was taken 2015-09-03 from 17:02:59 - 17:09:18 UT. The context Slit Jaw imager observes in a bandpass centered on 121.6nm (Lyman-α) with ~3.5 nm full width half maximum. The two spectro-polarimetric imagers observe in a wavelength range around Lyman-α at 121.6 nm with different, but overlapping wavelength windows for the two cameras. Both cameras observe Lyman-α at 121.6nm and an O V line at 121.83 nm. SP2 additionally observes the Si III line at 120.65 nm. The data released here are calibrated (see user's guide), and both polarization-modulated (for higher cadence) and demodulated data (Stokes parameters) are provided. Questions about CLASP can be directed to Amy Winebarger (amy.r.winebarger@nasa.gov). See CLASP Sounding Rocket Mission Opens New Research Window in Solar Physics for more information. 
Icon  Name                              Last modified      Size  Description
[PARENTDIR] Parent Directory                                       -   
[   ] CLASP_SP_ALL.tar.gz               2026-02-16 05:06  142M  Gzipped TAR of all combined SP1 and SP2 SpectroPolarimetric FITS images
[   ] CLASP_SJ_ALL.tar.gz               2026-02-16 05:06  924M  Gzipped TAR of all CLASP1 Slit-Jaw FITS images
[   ] CLASP_ALL.tar.gz                  2026-02-19 13:50  2.9G  Gzipped TAR of all CLASP1 FITS files
[   ] CLASP_SP2_ALL.tar.gz              2026-02-16 05:15  935M  Gzipped TAR of all CLASP1 Camera SP2 SpectroPolarimetric FITS images
[   ] CLASP_SP1_ALL.tar.gz              2026-02-16 05:09  962M  Gzipped TAR of all CLASP1 Camera SP1 SpectroPolarimetric FITS images
[   ] CLASP_SP_level2.tar.gz            2026-02-16 05:12   71M  Gzipped TAR of Level 2 combined SP1 and SP2 SpectroPolarimetric FITS images
[   ] CLASP_SJ_level2.tar.gz            2026-02-16 05:10  462M  Gzipped TAR of Level 2 CLASP1 Slit-Jaw FITS images
[   ] CLASP_SP2_level2.tar.gz           2026-02-16 05:14  115M  Gzipped TAR of Level 2 CLASP1 Camera SP2 SpectroPolarimetric FITS images
[   ] CLASP_SP1_level2.tar.gz           2026-02-16 05:13  121M  Gzipped TAR of Level 2 CLASP1 Camera SP1 SpectroPolarimetric FITS images
[   ] CLASP_SP_level1.tar.gz            2026-02-16 05:11   71M  Gzipped TAR of Level 1 combined SP1 and SP2 SpectroPolarimetric FITS images
[   ] CLASP_SJ_level1.tar.gz            2026-02-16 05:10  462M  Gzipped TAR of Level 1 CLASP1 Slit-Jaw FITS images
[   ] CLASP_SP2_level1.tar.gz           2026-02-16 05:14  115M  Gzipped TAR of Level 1 CLASP1 Camera SP2 SpectroPolarimetric FITS images
[   ] CLASP_SP1_level1.tar.gz           2026-02-16 05:13  121M  Gzipped TAR of Level 1 CLASP1 Camera SP1 SpectroPolarimetric FITS images
[   ] CLASP_SP2_level0.5.tar.gz         2026-02-16 05:14  704M  Gzipped TAR of Level 0.5 CLASP1 Camera SP2 SpectroPolarimetric FITS images
[   ] CLASP_SP1_level0.5.tar.gz         2026-02-16 05:13  720M  Gzipped TAR of Level 0.5 CLASP1 Camera SP1 SpectroPolarimetric FITS images
[DIR] coordinated_observations/         2026-02-18 18:22    -   Directory containing IRIS coordinated observation files
[   ] coordinated_observations.tar      2026-02-18 18:29  6.1G  Directory containing IRIS coordinated observation files
[   ] CLASP_Data_Levels_User_Guide.docx 2026-02-19 13:10  1.5M  CLASP 1 User Guide

Please let us know if you have any problems or questions: help@virtualsolar.org
Image: NASA and a global science team have used observations from CLASP sounding rocket mission to provide the first ultraviolet polarization measurements of the sun's outer atmosphere.
Image Credit: NAOJ, JAXA, NASA/MSFC; background solar image: NASA/SDO
Last updated: 2022-05-03 12:44 MDT Alisdair Davey