VenSpec-H Spectrometer Design

 The VenSpec-H spectrometer is a critical instrument on board the ESA EnVision mission to Venus, scheduled for launch in November 2031. As part of the VenSpec suite, which includes VenSpec-M and VenSpec-U, VenSpec-H is designed to operate in the near-infrared wavelength range (1.15 to 2.5 μm) and aims to map the atmosphere of Venus, particularly focusing on volcanic gases and surface changes. The instrument will perform observations both during the day, above the cloud deck, and at night, close to the planet’s surface.

VenSpec-H's optical system utilizes a nadir-viewing approach, employing an echelle grating as the diffractive element and a unique filter combination for precise spectral band selection. The instrument’s design and development have been undertaken through a collaboration involving Belgian leadership, with significant contributions from Swiss, Spanish, Dutch, and Belgian research institutes and industries.

This paper details the design requirements, mathematical modeling, analysis, and prototyping carried out during the instrument’s feasibility study (Phase A) and preliminary definition (Phase B1).

website: popularscientist.com

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