The Solar Orbiter Heliospheric Imager (SoloHI) is one of the six remote-sensing instruments on Solar Orbiter, which was launched 9 February 2020. SoloHI is designed, built, and operated by the U.S. Naval Research Laboratory (NRL). It will image the inner heliosphere over a wide FOV by observing visible photospheric light scattered by electrons in the solar wind and interplanetary dust. It builds on the success of the Heliospheric Imagers in the SECCHI suite of telescopes on the STEREO mission launched in 2006.
This movie illustrates the changing field-of-view (FOV) of the SoloHI instrument on the Solar Orbiter for a period of time near perihelion. The FOV is shown as it will appear when Solar Orbiter traverses the portion of an orbit inside 0.5 solar radii in 2025. The corresponding orbits of the Solar Orbit and Earth are shown in the upper right. The FOV is shown on data from the SECCHI instrument on STEREO-A for the same length of time and the dates for both Solar Orbiter and the STEREO-A data are shown in the lower right. The actual FOV is composed of four tiles within the circular FOV.
You can download this movie directly as a 6.8MB mp4 file.
SoloHI will perform remote observations of the Thomson-scattered white light from the solar wind plasma of the outer corona. It is a single, white-light telescope of 20° half angle with the inner… more