Usage of pre-flight data in short rendezvous mission of Soyuz-TMA spacecrafts |
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| Institution: | 1. University of Basilicata, School of Engineering, 10, Ateneo Lucano Street, 85100 Potenza, Italy;2. National Research Council, Institute of Methodologies for Environmental Analysis (IMAA), c/da S.Loja, 85050 Tito Scalo (PZ), Italy;1. Division of Sleep Medicine, Department of Medicine, Brigham and Women''s Hospital, Boston, MA 02115, USA;2. Division of Sleep Medicine, Harvard Medical School, Boston, MA 02115, USA;3. Sleep and Chronobiology Laboratory, Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA;1. Solar System Missions Division, ESA/ESTEC, Noordwijk, Netherlands;2. Office for Support to New Member States, ESA/ESTEC, Netherlands;3. Science Payload Instrument Section, ESA/ESTEC, Netherlands;1. Institute of Space and Astronautical Science, Sagamihara, Kanagawa 252 5210, Japan;2. Planetary Exploration Research Center, Chiba Institute of Technology, Chiba, Japan;3. Hokkaido University, Hokkaido, Japan;4. Senshu University, Tokyo, Japan;5. University of Tokyo, Tokyo, Japan;7. Okayama University, Okayama, Japan;1. Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russia;2. Research Centre for Astrophysics and Geophysics MAS, Ulaanbaatar, Mongolia;3. Irkutsk State Technical University, Irkutsk, Russia |
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| Abstract: | The paper describes the reduction of the vehicle autonomous flight duration before docking to the ISS. The Russian Soyuz-TMA spacecraft dock to the ISS two days after launch. Due to the limited volume inside Soyuz-TMA the reduction of time until docking to the ISS is very important, since the long stay of the cosmonauts in the limited volume adds to the strain of the space flight. In the previous papers of the authors it was shown that the existing capabilities of Soyuz-TMA, the ISS and the ground control loop make it possible to transfer to the five-orbit rendezvous profile. However, the analysis of the cosmonauts' schedule on the launch day shows that its duration is at the allowable limit and that is why it is necessary to find a way to further reduce the flight duration of Soyuz-TMA before docking to less than five orbits. In a traditional rendezvous profile, the calculation of rendezvous burns begins only after determination of the actual vehicle insertion orbit. The paper describes an approach in which the first two rendezvous burns are performed as soon as the spacecraft reaches the reference orbit and the values of the burns are calculated prior to the launch based on the pre-flight data for the nominal insertion. This approach decreases the duration of the rendezvous by one orbit. The demonstration flight of a Progress vehicle using the proposed profile was implemented on August 1, 2012 and completely confirmed the correctness of the imbedded principles. The paper considers the possible improvements of the proposed approach and recovery from the contingencies. |
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| Keywords: | Short rendezvous profile Human flight |
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