Mr. Stephen J. Hagopian Profile

Stephen J. Hagopian

at NASA Goddard Space Flight Ctr.

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Proceedings Article | 24 August 2024 Presentation

Picometer-level metrology of test articles on the road to Habitable Worlds Observatory

Breann Sitarski, Babak Saif, Marcel Bluth, Peter Petrone, Perry Greenfield, Lee Feinberg, Sang Park, Michael Eisenhower, Thomas Zielinski, Ritva Keski-Kuha, Theodore Hadjimichael, Stephen Hagopian

Proceedings Volume 13092, 130921R (2024) https://doi.org/10.1117/12.3018843

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The Habitable Worlds Observatory will revolutionize our understanding of the universe by directly detecting biosignatures on extrasolar planets and allow us to answer the question if we are alone in the universe. To accomplish the tight science goals associated with this mission, the development of an ultrastable observatory with a coronagraphic instrument is necessary. The observatory itself may need to stay stable on the order of 10 picometers over a wavefront control cycle, orders of magnitude more stable than what is required on current space missions. The metrology to verify stability requirements must be roughly a factor of ten more stable. The ultrastable laboratory at NASA’s Goddard Space Flight Center has further stabilized its testbed to allow for dynamic measurements on diffuse and specular objects on the order of single picometers, and we are currently measuring drifts on the orders of tens of picometers over different temporal bands. This paper will discuss the mechanical updates to the testbed setup, the analysis performed on several test articles, and the path forward on the road to measuring achieving the required stability for Habitable Worlds Observatory.

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