Simulating instrumental phase errors for SIM

T. Boker, R. J. Allen, J. Rajagopal, Olivier Guyon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The Space Interferometer Mission (SIM) has considerable capabilities for imaging of complex targets with the resolution of a diffraction-limited 12 m telescope. The exact performance of SIM in this regard depends-among other factors - critically on its mechanical stability. For example, structural vibrations will lead to errors in the in the delay line position and thus in the derived phase of the incoming wavefront. Depending on the time constants of such vibrations and on whether or not they are random in nature, image reconstruction can be affected in different ways. In order to estimate the impact of such instrumental imperfections, we have improved our simulation code SIMSIM in a number of ways. For example, in order to develop the code further towards a possible analysis tool for real aperture synthesis data, the new version - SIMSIM-II-allows (u,v)-datapoints which are sampled on a non-regular grid. In addition, the user can choose between various models for phase and amplitude errors. Using these capabilities, we have modeled aperture synthesis observations with SIM with varying degrees of error in the visibility data. Simple metrics such as dynamic range or image fidelity are used to quantify the degradation of the reconstructed image. We demonstrate that SIMSIM-II is a suitable analysis tool for deriving hardware specifications and to optimize the stategy for imaging observations with SIM.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Volume4006
StatePublished - 2000
Externally publishedYes
EventInterferometry in Optical Astronomy - Munich, Ger
Duration: Mar 27 2000Mar 29 2000

Other

OtherInterferometry in Optical Astronomy
CityMunich, Ger
Period3/27/003/29/00

Fingerprint

phase error
Interferometers
interferometers
apertures
Imaging techniques
structural vibration
Mechanical stability
Electric delay lines
delay lines
Wavefronts
synthesis
image reconstruction
Image reconstruction
visibility
Visibility
Telescopes
time constant
dynamic range
specifications
hardware

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Boker, T., Allen, R. J., Rajagopal, J., & Guyon, O. (2000). Simulating instrumental phase errors for SIM. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4006). Society of Photo-Optical Instrumentation Engineers.

Simulating instrumental phase errors for SIM. / Boker, T.; Allen, R. J.; Rajagopal, J.; Guyon, Olivier.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4006 Society of Photo-Optical Instrumentation Engineers, 2000.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Boker, T, Allen, RJ, Rajagopal, J & Guyon, O 2000, Simulating instrumental phase errors for SIM. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 4006, Society of Photo-Optical Instrumentation Engineers, Interferometry in Optical Astronomy, Munich, Ger, 3/27/00.
Boker T, Allen RJ, Rajagopal J, Guyon O. Simulating instrumental phase errors for SIM. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4006. Society of Photo-Optical Instrumentation Engineers. 2000
Boker, T. ; Allen, R. J. ; Rajagopal, J. ; Guyon, Olivier. / Simulating instrumental phase errors for SIM. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4006 Society of Photo-Optical Instrumentation Engineers, 2000.
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