Physics – Optics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.354..177c&link_type=abstract
In ESA, Targets for Space-Based Interferometry p 177-181 (SEE N93-31750 12-89)
Physics
Optics
Astrometry, Astronomical Interferometry, Space Observations (From Earth), Spaceborne Astronomy, Adaptive Optics, Comparison, Imaging Techniques, Telescopes
Scientific paper
The potential imaging performance of large telescopes using adaptive optics with laser guide stars, and of interferometers using laser phased subapertures are considered. The potential astrometric performance from the ground is also discussed. For each case the implications for a space interferometry mission are considered. The advantages of the space environment for optical and infrared astronomical interferometry are: transparency at all wavelength bands, no atmospheric turbulence, and the ability to cool optics for observation in the thermal infrared. However, ground based interferometry also has important advantages: the availability of large apertures and long baselines and generally lower costs. While transparency and thermal emission are fundamental, adaptive optics aided by laser guide stars shows promise to eliminate some of the effects of turbulence for ground based imaging. Other techniques such as phase referencing and closure phase can also be used to circumvent some of the effects of atmospheric turbulence. While it is a long step from the theoretical performance predictions for a ground based instrument to their attainment, a future space imaging interferometer must emphasize those capabilities which are impossible or at least very difficult from the ground: UV observations, very high dynamic range measurements, or high resolution measurements of faint, extended objects. The case for space astrometry is more clear: while ground interferometry can offer high accuracies over very small fields, a space interferometer can offer more than two orders of magnitude better performance over wide fields than that achievable with groundbased systems.
No associations
LandOfFree
Prospects for imaging and astrometry on the ground and implications for space interferometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Prospects for imaging and astrometry on the ground and implications for space interferometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Prospects for imaging and astrometry on the ground and implications for space interferometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1114353