Solar wind structure seen by IMAP/GLOWS

Space Research Centre, Polish Academy of Sciences, Warsaw, Poland GLOWS (GLObal solar Wind Structure) is one of the experiments on a NASA mission IMAP (Interstellar Mapping and Acceleration Probe). The objective of GLOWS is to investigate the global heliolatitude structure of the solar wind and its evolution during the solar cycle. Additionally, GLOWS investigates the distribution of interstellar neutral hydrogen (ISN H) and the solar radiation pressure acting on ISN H. The objectives of GLOWS are accomplished by observation of the heliospheric hydrogen backscatter glow (the helioglow). The helioglow is created by resonant excitation of ISN H atoms within several au from the Sun by the intense solar electromagnetic radiation in the Lyman-α waveband 121.567 nm. The H atoms move in this region collisionless, and thus immediately after excitation of the photons from the Sun, they re-emit them in random directions. Those re-emitted photons form the helioglow. The intensity of the helioglow observed at ∼1 au varies across the sky, dependent on the location of the observer; it is on the order of 300–1000 Rayleigh. We present an update on the GLOWS instrument observations, carried on since November 2025, and the first latitudinal profiles solar wind speed and density obtained on the orbit.