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Space Interferometry Mission (SIM) Flight System
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Polarization Effects Aboard the Space Interferometry Mission
For precision displacement measurements, laser metrology is currently one of the most accurate measurements. Often, the measurement is located some distance away from the laser source, and as a result, stringent requirements are placed on the laser delivery system with respect to the state of polarization. Such is the case with the fiber distribution assembly (FDA) that is slated to fly aboard the Space Interferometry Mission (SIM) next decade. This system utilizes a concatenated array of couplers, polarizers and lengthy runs of polarization-maintaining (PM) fiber to distribute linearly-polarized light from a single laser to fourteen different optical metrology measurement points throughout the spacecraft. Optical power fluctuations at the point of measurement can be traced back to the polarization extinction ration (PER) of the concatenated components, in conjunction with the rate of change in phase difference of the light along the slow and fast axes of the PM fiber.
The Space Interferometry Mission (SIM): technology development progress and plans
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Technology development for the Space Interferometry Mission (SIM) - status and plans
Optical and infrared interferometry will open new vistas for astronomy over the next decade. The Interferometry Technology Program at NASA's Jet Propulsion Laboratory is addressing these challenges with a development program that plans to establish technology readiness for the Space Interferometry Mission by end of 2001.
Precision Distance Measurement with the Space Interferometry Mission
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Space interferometry mission spacecraft pointing error budgets
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The Space Interferometry Mission (SIM)-- revolutionary astronomy, breakthrough technology
optical and infrared interferometry will open new vistas for astronomy over the next decade. space based interferometers, operating unfettered by the Earth's atmosphere, will offer the greatest scientific payoff
The Space Interferometry Mission
In this paper we will present selected topics from the SIM science program focusing on some specific astronomical questions to be addressed.
On Multidisciplinary Modeling of the Space Interferometry Mission
This paper provides an overview of the multidisciplinary integrated modeling methodology for SIM that encompasses the optics, structures, dynamics and control disciplines within a common software environment.
High speed interconnect for the Space Interferometry Mission
This paper describes a high-speed avionics interconnect for a space-borne stellar interferometer.
Space Interferometry Mission Science Overview
Conclusions: SIM is on track for a launch in 2010. Project 'Phase C' start in October 2005. SIM is a flexibly-pointed instrument Astrometric capability (wide angle) a) 4 pas parallax precision on targets down to V = 20 = Stellar and Galactic astrophysics; and b) 1 pas single measurement accuracy. Sensitive to terrestrial-mass planets around the nearest stars New proposal opportunities are: a) AO-2 for new (large) Key projects - 2005; and b) General Observer program, for smaller proposals - 2006.
The Practice of Astrometry in Space with the Space Interferometry Mission Instrument
A short tutorial covering the basics of astrometry and interferometry relating to the SIM mission is presented.
Space interferometry mission system testbed 3: external metrology
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The Space Interferometry Mission (SIM): technology development progress and plans
Optical and infrared interferometry will open new vistas for astronomy over the next decade. Space based interferometers, operating unfettered by the Earth's atmosphere, will offer the greatest scientific payoff. They also present the greatest technological challenge: laser metrology systems must perform with sub-nanometer precision; mechanical vibrations must be controlled to nanometers requiring orders of magnitude distrubance rejection; a multitude of actuators and sensors must operate flawlessly and in concert.