Improvements for group delay fringe tracking
Astrophysics
2009-11-10 v1
Abstract
Group delay fringe tracking using spectrally-dispersed fringes is suitable for stabilising the optical path difference in ground-based astronomical optical interferometers in low light situations. We discuss the performance of group delay tracking algorithms when the effects of atmospheric dispersion, high-frequency atmospheric temporal phase variations, non-ideal path modulation, non-ideal spectral sampling, and the detection artifacts introduced by electron-multiplying CCDs (EMCCDs) are taken into account, and we present ways in which the tracking capability can be optimised in the presence of these effects.
Keywords
Cite
@article{arxiv.astro-ph/0411787,
title = {Improvements for group delay fringe tracking},
author = {A. G. Basden and D. F. Buscher},
journal= {arXiv preprint arXiv:astro-ph/0411787},
year = {2009}
}
Comments
15 pages, accepted for publication in MNRAS