Science with the Space Interferometry Mission
The Space Interferometry Mission (SIM) will be NASA's first dedicated space-based optical interferometer.
Interferometry↗
Engineering topics
Shao, M.
Publications and source records attributed to Shao, M..
The Palomar Testbed Interferometer
The Palomar Testbed Interferometer (PTI) is a long-baseline infrared interferometer located at Palomar Observatory, California.
Palomar↗
An Interferometric Search for Bright Companions to 51 Pegasi
We report on a near-infrared, long-baseline interferometric search for luminous companions to the star 51 Pegasi conducted with the Palomar Testbed Interferometer. Our data is completely consistent with a single-star hypothesis.
binaries spectroscopy planetary systems stars 51 P↗
RADII and Effective Temperatures for G,K and M Giants and Supergiants
Interferometrically determined angular diameters obtained at the Palomar Testbed Interferometer (PTI) for 80 giant and supergiant stars are presented in this paper.
Temperatures Palomar Testbed Interferometer (PTI) ↗
Deep Space 3 Metrology System
A metrology subsystem on board the Deep Space 3, a separated interferometer mission, is used to determine stellar fringe delay jitter, delay rate, and intial delay.
Deep↗
Palomar Testbed Interferometer
The Palomar Testbed Interferometer (PTI) is an infrared, phase-tracking interferometer in operation at Palomar Mountain since July 1995. It was funded by NASA for the purpose of developing techniques and methodologies for doing narrow-angle astrometry for the purpose of detecting extrasolar planets.
optical↗
Science Goals for The Space Interferometry Mission
Explore the source record for details and available documents.
Space Interferometry Mission optical Interferomete↗
Astrometry with the Keck Interferometer
A key thrust of NASA's Origins program is the search for and detection of planetary systems about other stars.
astrometry↗
The Keck Interferometer
The Keck Interferometer is being developed by JPL and CARA as one of the ground-based components of NASA's Origins Program. The interferometer will combine the two 10-m Keck telescopes with four proposed 1.8-m outrigger telescopes located at the periphery of the Keck site on Mauna Kea.
optical↗
The Visual Orbit of Pegasi
Pegasi (HR 8430, HD 210027) is a nearby, short-period (10.2 d) binary system with a F5V primary and a ~ G8V secondary in a circular orbit.
Pegasi HR 8430↗
Global astrometry with the space interferometry mission
The prospects for global astrometric measurements with the space interferometry mission (SIM) are discussed. The SIM mission will perform four microarcsec astrometric measurements on objects as faint as 20 mag using the optical interferometry technique with a 10 m baseline. The SIM satellite will perform narrow angle astrometry and global astrometry by means of an astrometric grid. The sensitivities of the SIM global astrometric performance and the grid accuracy versus instrumental parameters and sky coverage schemes are reported on. The problems in finding suitable astrometric grid objects to support microarcsec astrometry, and related ground-based observation programs are discussed.
Boden, A.↗
Astrometric Detection of Planets
Astrometry is undergoing a rebirth. From modern photoelectric instruments on telescopes to the fine guidance sensors on HST to the Hipparcos mission, astrometric instruments have significantly increased in accuracy in the recent past.
Detection of Planets Astrometry photoelectric inst↗
The Distance of the Large Magellanic Cloud Global Astrometry with the Space Interferometry Mission (SIM)
In this paper we will discuss the prospects for global astrometric measurements with the Space Interferometry Mission (SIM). SIM will perform four microarcsecond astrometric measurements onpoint-like objects as dim as 20th magnitude using optical interferometric techniques with a 10m baseline.
astrometric Space Interferometry Mission↗
Astrometric Observation of MACHO Gravitational Microlensing
This paper discusses the prospects for astrometric observation of MACHO gravitational microlensing events. We derive the expected astrometric observables for a simple microlensing event assuming a dark MACHO, and demonstrate that accurate astrometry can determine the lens mass, distance, and proper motion in a very general fashion.
Astrometry MACHO Microlensing↗
Space Interferometry Mission
The Space Interferometry Mission (SIM) is NASA's first space science interferometer, and will enable fundamental new discoveries in both galactic and extra-galactic astronomy, including cosmic distance scale...It demonstrates several key technologies...
interferometry↗
Separated Spacecraft Interferometer Concept for the New Millenium Program
A separated spacecraft optical interferometer mission concept proposed for NASA'a New Millenium Program is described. The interferometer insturment is distributed over three small spacecraft: two spacecraft serve as collectors, directing starlight toward a third spacecraft which combines the light and performs the interferometric detection.
optical↗
Feedback shift register sequences versus uniformly distributed random sequences for correlation chromatography
Two alternative input sequences are commonly employed in correlation chromatography (CC). They are sequences derived according to the algorithm of the feedback shift register (i.e., pseudo random binary sequences (PRBS)) and sequences derived by using the uniform random binary sequences (URBS). These two sequences are compared. By applying the "cleaning" data processing technique to the correlograms that result from these sequences, we show that when the PRBS is used the S/N of the correlogram is much higher than the one resulting from using URBS.
NASA Discipline Exobiology↗