Instant: An Innovative L5 Small Mission Concept for Coordinated Science with Solar Orbiter and Solar Probe Plus
Benoit Lavraud1, Ying D. Liu2, Richard Anthony Harrison3, William Liu2, F Auchere4, Weiqun Gan5, Philippe L Lamy6, Lidong Xia7, Jonathan P Eastwood8, Robert F Wimmer-Schweingruber9, Qiugang Zong10, Pierre Leon Rochus11, Milan Maksimovic12, Manuela Temmer13, C Philippe Escoubet14, K Emilia J Kilpua15, Alexis P Rouillard16, Jackie A Davies17, Jean-Claude Vial18, Nat Gopalswamy19, Stuart D Bale20, Gang Li21, Timothy A Howard22 and Craig E DeForest22, (1)Laboratoire d'astrophysique de Bordeaux, Pessac, France, (2)NSSC National Space Science Center, CAS, Beijing, China, (3)United Kingdom Research and Innovation - Science & Technology Facilities Council - Rutherford Appleton Laboratory, RAL Space, Didcot, United Kingdom, (4)Université Paris-Saclay, CNRS, Institut d'Astrophysique Spatiale, Orsay, France, (5)Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China, (6)Lab Astrophysique Marseille, Marseilles Cedex 13, France, (7)Shandong Univ. at Weihai, Weihai, China, (8)Imperial College London, Physics, London, United Kingdom, (9)University of Kiel, Institute for Experimental and Applied Physics, Kiel, Germany, (10)Peking University, Institute of Space Physics and Applied Technology, Beijing, China, (11)Centre Spatial de Liege, Liege, Belgium, (12)LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, Meudon, France, Meudon, France, (13)University of Graz, Graz, Austria, (14)ESTEC, Noordwijk, 2201, Netherlands, (15)University of Helsinki, Department of Physics, Helsinki, Finland, (16)Université Toulouse III - Paul Sabatier, Observatoire Midi–Pyrénées, CNRS, CNES, IRAP, Toulouse, France, (17)United Kingdom Research and Innovation - Science & Technology Facilities Council, Rutherford Appleton Laboratory, RAL Space, Didcot, United Kingdom, (18)IAS Institut d'Astrophysique Spatiale, Orsay Cedex, France, (19)NASA Goddard SFC, Greenbelt, United States, (20)University of California Berkeley, Berkeley, United States, (21)University of Alabama in Huntsville, Department of Space Sciences and CSPAR, Huntsville, AL, United States, (22)Southwest Research Institute Boulder, Boulder, CO, United States
Abstract:
We will present both the science objectives and related instrumentation of a small solar and heliospheric mission concept, INSTANT: INvestigation of Solar-Terrestrial Activity aNd Transients. It will be submitted as an opportunity to the upcoming ESA-China S-class mission call later this year. This concept was conceived to allow innovative measurements and unprecedented, early determination of key properties of Earthbound CMEs from the L5 vantage point. Innovative measurements will include magnetic field determination in the corona thanks to Hanle measurement in Lyman-α and polarized heliospheric imaging for accurate determination of CME trajectories. With complementary in situ measurements, it will uniquely permit solar storm science, solar storm surveillance, and synergy with Solar Orbiter and Solar Probe Plus (the ESA-China S2 mission launch is planned in 2021).
