%0 Journal Article %T Characteristics of the local interstellar hydrogen determined from PROGNOZ 5 and 6 interplanetary Lyman-alpha line profile measurements with a hydrogen absorption cell %+ Service d'aéronomie (SA) %+ Space Research Institute of the Russian Academy of Sciences (IKI) %A Bertaux, Jean-Loup %A Lallement, Rosine %A Kurt, V. G. %A Mironova, E., N. %< avec comité de lecture %@ 0004-6361 %J Astronomy and Astrophysics - A&A %I EDP Sciences %V 150 %N 1 %P 1-20 %8 1985 %D 1985 %K Hydrogen Atoms %K Interstellar Gas %K Interstellar Radiation %K Lyman Alpha Radiation %K Spaceborne Astronomy %K Ultraviolet Absorption %K Line Shape %K Prognoz Satellites %K Solar Activity Effects %K Solar System %K Astrophysics %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles %X The flow of interstellar H atoms in the solar system was observed through resonance scattering of solar Lyman-alpha protons with two Lyman-alpha photometers on the Prognoz 5 and 6 satellites. Data collected at five different locations in the solar system were compared with a model of the interstellar H flow, modified by solar interaction. Five parameters describing atomic hydrogen of the local interstellar medium and two parameters describing the solar interaction were derived simultaneously to give a good fit of the upwind hemisphere. The solar Lyman-alpha flux at line center was determined along with the ionization rate of H atoms. %G English %2 https://insu.hal.science/insu-03168777/document %2 https://insu.hal.science/insu-03168777/file/1985A%2BA___150____1B.pdf %L insu-03168777 %U https://insu.hal.science/insu-03168777 %~ INSU %~ UPMC %~ CNRS %~ UVSQ %~ AERONOMIE %~ SORBONNE-UNIVERSITE %~ SU-TI %~ ALLIANCE-SU