ESA presses ahead on EnVision Venus mission as NASA drops radar instrument
NASA is unlikely to deliver the VenSAR radar it committed to ESA's EnVision Venus orbiter, per Ars Technica; ESA says it's pressing ahead.
what happened
NASA officials determined they are unlikely to fulfill a 2024 commitment to supply a US-built synthetic aperture radar instrument, VenSAR, for ESA's EnVision Venus orbiter, the mission's project scientist said, per Ars Technica. ESA said it is moving "full steam ahead" with EnVision's development regardless. Under the 2024 memorandum of understanding, NASA had agreed to supply VenSAR, EnVision's primary surface-mapping instrument, plus Deep Space Network tracking and communications support, in exchange for US researchers joining the science team; ESA is building the spacecraft, its other instruments, and providing the Ariane 6 launch.
why it matters
Losing VenSAR forces ESA to develop or source a European radar instrument on a tight schedule: EnVision must launch by 2033 or wait years for the next Venus transfer window, and the funding retreat is the latest instance of NASA science-budget cuts unwinding an international mission partnership, a pattern European instrument and spacecraft suppliers are weighing in future collaborations.