منابع مشابه
Optical Aperture Synthesis
Optical aperture synthesis (OAS) from an aircraft platform is considered. Critical technical risks for implementation of OAS are examined for active and passive systems. The improved range for target recognition and identification makes OAS an attractive high-risk, high-payoff proposition.
متن کاملGPS Distributed Aperture Positioning (GDAP)
The GPS signal is subject to a variety of potential degradations, such as path loss (e.g., foliated or indoor environments), multipath (e.g., urban canyon or inbuilding), and interference (intentional or unintentional). There are many applications, both commercial and military, where a group of GPS users may operate together in a denied or degraded GPS environment. Using the traditional GPS rec...
متن کاملAntenna Array Design in Aperture Synthesis Radiometers 169 Antenna Array Design in Aperture Synthesis Radiometers
During the past few decades, there has been growing interest in the use of microwave and millimeter wave radiometers for remote sensing of the Earth. Due to the need of large antennas and scanning mechanism, the conventional real aperture radiometer becomes infeasible for high spatial resolution application. Interferometric aperture synthesis was suggested as an alternative to real aperture rad...
متن کاملChapter 9: Interferometry and Aperture Synthesis
How can we get higher angular resolution than the simple full width at half maximum of the Airy function,/D, where D is the largest that we can afford? One answer is indicated in the bottom panel of Figure 8.18. If we mask off all of our telescope mirror except two small apertures of diameter d at the edge, the “central peak” of our image becomes twice as sharp as the Airy function but with h...
متن کاملOptical aperture synthesis with electronically connected telescopes
Highest resolution imaging in astronomy is achieved by interferometry, connecting telescopes over increasingly longer distances and at successively shorter wavelengths. Here, we present the first diffraction-limited images in visual light, produced by an array of independent optical telescopes, connected electronically only, with no optical links between them. With an array of small telescopes,...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2010
ISSN: 1094-4087
DOI: 10.1364/oe.18.010334