TY - JOUR
T1 - VENµS mission
T2 - 73rd International Astronautical Congress, IAC 2022
AU - Raynaud, Jean Louis
AU - Dick, Arthur
AU - Rolland, Amandine
AU - Michel, Julien
AU - Moreau, Agathe
AU - Hagolle, Olivier
AU - Dedieu, Gerard
AU - Karnieli, Arnon
AU - Binet, Renaud
AU - Pelou, Sophie
AU - Salvoldi, Manuel
N1 - Publisher Copyright:
Copyright © 2022 by the International Astronautical Federation (IAF). All rights reserved.
PY - 2022/1/1
Y1 - 2022/1/1
N2 - Vegetation and Environment New Micro Satellite(VENµS) is an ISRAELI-FRENCH Earth observation satellite that provides optical time series, from Level-1 up to Level-3 products (bi-monthly syntheses of surface reflectances), over a selection of 186 specific sites worldwide. Launched on August 2nd, 2017, on a polar sun-synchronous orbit, this mission provides a unique combination of high spatial, spectral, and especially revisit frequency characteristics with 12 spectral bands imagery. After three years of 2-day revisit scientific mission on Earth resources monitoring, thanks to the good health of the mission, CNES and ISA decided to extend the mission to take benefit of this satellite and explore a new unique feature in Earth observation: a 1-day revisit period associated with a 4-m spatial resolution. This phase, named VENµS Mission 5(VM5), began in March 2022 and should last two years. After a brief description of the VENµS specifications, this paper overviews this new mission phase in VENµS life. It describes how the ground and board segments have been adapted to manage these new temporal revisit specificities. The selected sites are also introduced concerning the acquisitions, and the first results concerning radiometric and geometric performances are presented. Moreover, considering these new characteristics, VENµS role as a demonstrator in preparing new missions is emphasized. Indeed, this new 1-day revisit orbit at 560 km provides data that may simulate future high revisit and high-resolution sensors, such as the next generations of Sentinel-2 or Landsat. It also allows to accurately benchmark spatio-temporal fusion methods dedicated to merge Sentinel-2 and future metric resolution and lower revisit period missions, such as the Sentinel-HR mission currently studied by CNES. By merging Sentinel-2 and Sentinel-HR data, it will be possible to get a high resolution and high revisit time series.
AB - Vegetation and Environment New Micro Satellite(VENµS) is an ISRAELI-FRENCH Earth observation satellite that provides optical time series, from Level-1 up to Level-3 products (bi-monthly syntheses of surface reflectances), over a selection of 186 specific sites worldwide. Launched on August 2nd, 2017, on a polar sun-synchronous orbit, this mission provides a unique combination of high spatial, spectral, and especially revisit frequency characteristics with 12 spectral bands imagery. After three years of 2-day revisit scientific mission on Earth resources monitoring, thanks to the good health of the mission, CNES and ISA decided to extend the mission to take benefit of this satellite and explore a new unique feature in Earth observation: a 1-day revisit period associated with a 4-m spatial resolution. This phase, named VENµS Mission 5(VM5), began in March 2022 and should last two years. After a brief description of the VENµS specifications, this paper overviews this new mission phase in VENµS life. It describes how the ground and board segments have been adapted to manage these new temporal revisit specificities. The selected sites are also introduced concerning the acquisitions, and the first results concerning radiometric and geometric performances are presented. Moreover, considering these new characteristics, VENµS role as a demonstrator in preparing new missions is emphasized. Indeed, this new 1-day revisit orbit at 560 km provides data that may simulate future high revisit and high-resolution sensors, such as the next generations of Sentinel-2 or Landsat. It also allows to accurately benchmark spatio-temporal fusion methods dedicated to merge Sentinel-2 and future metric resolution and lower revisit period missions, such as the Sentinel-HR mission currently studied by CNES. By merging Sentinel-2 and Sentinel-HR data, it will be possible to get a high resolution and high revisit time series.
KW - Earth observation
KW - VENµS
KW - fusion
KW - revisit
KW - vegetation
UR - http://www.scopus.com/inward/record.url?scp=85167605186&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85167605186
SN - 0074-1795
VL - 2022-September
JO - Proceedings of the International Astronautical Congress, IAC
JF - Proceedings of the International Astronautical Congress, IAC
Y2 - 18 September 2022 through 22 September 2022
ER -