Characterization of Instrumental Phase Stability

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dc.creatorKubo, D. Y.
dc.creatorHunter, T. R.
dc.creatorChristensen, R. D.
dc.creatorYamaguchi, P. I.
dc.date2007-04-17
dc.date.accessioned2026-07-07T07:56:52Z
dc.date.available2026-07-07T07:56:52Z
dc.descriptionAtmospheric water vapor causes significant undesired phase fluctuations for the Submillimeter Array (SMA) interferometer, particularly in its highest frequency observing band of 690 GHz. One proposed solution to this atmospheric effect is to observe simultaneously at two separate frequency bands of 230 and 690 GHz. Although the phase fluctuations have a smaller magnitude at the lower frequency, they can be measured more accurately and on shorter timescales due to the greater sensitivity of the array to celestial point source calibrators at this frequency. In theory, we can measure the atmospheric phase fluctuations in the 230 GHz band, scale them appropriately with frequency, and apply them to the data in 690 band during the post-observation calibration process. The ultimate limit to this atmospheric phase calibration scheme will be set by the instrumental phase stability of the IF and LO systems. We describe the methodology and initial results of the phase stability characterization of the IF and LO systems.
dc.description10 pages, 12 figures, presented in poster form in May 2006 at the SPIE conference: Astronomical Telescopes and Instrumentation 2006, in the section on Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III
dc.identifierhttps://arxiv.org/abs/0704.2160
dc.identifierhttp://arxiv.org/abs/0704.2160
dc.identifierProceedings of the SPIE, Volume 6275 (2006)
dc.identifierdoi:10.1117/12.672927
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/127470
dc.subjectAstrophysics
dc.titleCharacterization of Instrumental Phase Stability
dc.typetext

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