Timeline for If you focus in on one image, is combining two telescopes really equivalent to a larger mirror?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Apr 11, 2012 at 16:11 | comment | added | Martin Beckett | @DanNeely - you get a double slit pattern for each pair of dishes - all superimposed (in time or space - depending on your detector system). You normally arrange the dish pattern so that each pairwise combination is at a different spacing and/or angle so you can capture more of the fourier plane in each 'shot' and con unravel the individual pairs | |
| Apr 11, 2012 at 15:56 | comment | added | Dan Is Fiddling By Firelight | Is the double slit fringe pattern the result for any interferometer, or only a two element one? If the latter, how are the patterns for more complex designs described? | |
| Aug 10, 2011 at 15:22 | comment | added | Martin Beckett | @strmqm - the interferometer gives you a fourier transform of the image. But not the entire UV plane, just a few lines, points and curves in it (depending on how many baselines you have). You try to recreate an image that matches this transform. The main algorithms are called "memsys" and "clean" | |
| Aug 10, 2011 at 9:18 | comment | added | strmqm | +1, good answer. The details of the iterative process of matching the fringe pattern to the model is the bit that I find very hard to get my head around. | |
| Aug 10, 2011 at 2:24 | history | answered | Martin Beckett | CC BY-SA 3.0 |