Solar Orbiter Heliospheric Imager (SoloHI)

Data recorded by the SoloHI instrument during the remote sensing windows of the science phase of the Solar Orbiter mission have been publicly released. The data are generally made public at most three months from the date that all telemetry from that period has been received on the ground. 

SoloHI Data User Guide

SoloHI IDL routines are available in SSW at $SSW/so/solohi/idl 

These routines allow for the reading in of SoloHI FITS files, combing of tiles into the full mosaic, and processing movie cubes.

Available Data

Data is currently available for RSWs 1-6. 
Future releases: In the near future, we will begin providing data from outside the RSW periods. 


Data Formats/Products

We are making several data products available including raw and processed images (science data and PNGs), and movies (animations) in different formats. The science data is provided in the FITS (Flexible Image Transport System), for which three different products are available: Level-1, Level-2 and Level-3, described below.

  • Level-1 (L1): de-compressed, uncalibrated image data with no correction applied, except for rectification, so that solar north is (approximately) up. Data units are DN.
  • Level-2 (L2): calibrated data in units of Mean Solar Brightness (MSB), with bias, stray light and vignetting corrections applied.
  • Level-3 (L3): L2 images with the F-corona removed to highlight solar transients. These files are currently under development. 
  • Summary Files: Daily files containing a list of observations and some basic information about each image.

Choosing your data product

In most circumstances, we recommend use of the Level-2 or Level-3 data products for essentially all scientific analyses, both qualitative and quantitative. The PNG and mpg movie formats are appropriate for browsing the data but should not be used as quantitative science tools.

Data Access

Direct access to L1 FITS files:

Direct access to L2 FITS files:

Direct access to Daily Summary files:


Data release history notes

Please refer to our SoloHI Data Release Notes page for descriptions of any data version releases/revisions we have made.


Solar Orbiter is a mission of international cooperation between the European Space Agency (ESA) and the National Aeronautics and Space Administration (NASA), operated by ESA. 

The Solar Orbiter Heliospheric Imager (SoloHI) instrument was designed, built, and is now operated by the US Naval Research Laboratory with the support of the NASA Heliophysics Division, Solar Orbiter Collaboration Office under DPR NNG09EK11I. The NRL effort was also supported by the Office of Naval Research.

Solar Orbiter has an open data policy. 

The appropriate journal reference to use for SoloHI data is Howard, R. et al. (2020), The Solar Orbiter Heliospheric Imager (SoloHI), A&A, 642, 23,


WISPR Pub Number 1