An ultra stable optical bench for the magnetic survey satellite

Wingate, C. A.; Coughlin, Thomas B.; Sullivan, R. M.

doi:10.1016/0094-5765(80)90014-4

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“…While careful system design and material selection may help, it is unlikely that relative alignment will stay truly fixed at the milliarcsecond level as the vehicle changes orientation relative to the Sun. Indeed, optical bench designs for past space missions [135,136] suggest that maintaining instrument alignment below the arcsecond level by passive means alone would be prohibitively difficult with conventional designs and materials. Therefore—since these thermal deformations cannot be eliminated, are difficult to model, and are not predictable in real-time with the requisite precision—the common solution is to have a metrology system to measure changes in the alignment between the various instruments.…”

Section: Preliminary Feasibility Assessment Of Starnav Measurementsmentioning

confidence: 99%

StarNAV: Autonomous Optical Navigation of a Spacecraft by the Relativistic Perturbation of Starlight

Christian

2019

Sensors

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Future space exploration missions require increased autonomy. This is especially true for navigation, where continued reliance on Earth-based resources is often a limiting factor in mission design and selection. In response to the need for autonomous navigation, this work introduces the StarNAV framework that may allow a spacecraft to autonomously navigate anywhere in the Solar System (or beyond) using only passive observations of naturally occurring starlight. Relativistic perturbations in the wavelength and direction of observed stars may be used to infer spacecraft velocity which, in turn, may be used for navigation. This work develops the mathematics governing such an approach and explores its efficacy for autonomous navigation. Measurement of stellar spectral shift due to the relativistic Doppler effect is found to be ineffective in practice. Instead, measurement of the change in inter-star angle due to stellar aberration appears to be the most promising technique for navigation by the relativistic perturbation of starlight.

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Section: Preliminary Feasibility Assessment Of Starnav Measurementsmentioning

confidence: 99%

StarNAV: Autonomous Optical Navigation of a Spacecraft by the Relativistic Perturbation of Starlight

Christian

2019

Sensors

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An ultra stable optical bench for the magnetic survey satellite

Cited by 1 publication

References 1 publication

StarNAV: Autonomous Optical Navigation of a Spacecraft by the Relativistic Perturbation of Starlight

StarNAV: Autonomous Optical Navigation of a Spacecraft by the Relativistic Perturbation of Starlight

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