Observing Strategies For Sihtf: Implications For Facility Chopping Requirements

Allan J. Mord

doi:10.1117/12.944978

1 February 1985 Observing Strategies For Sihtf: Implications For Facility Chopping Requirements

Allan J. Mord

Proceedings Volume 0509, Cryogenic Optical Systems and Instruments I; (1985) https://doi.org/10.1117/12.944978
Event: 28th Annual Technical Symposium, 1984, San Diego, United States

Abstract

It has long been baselined that the SIRTF facility must provide spatial chopping at all observing wavelengths. Requiring tnat the image be stabilized to a small fraction of the Airy disk then implies that the spatial chopping must be combined with high-accuracy image motion compensation. An earlier system study found that this requirement is a major driver of the SIRTF design. We have reviewed the underlying requirements for modulating the infrared signal and examined the various kinds of modulation tnat could be used, and find that spatial chopping is not needed simultaneously with the highest-accuracy image stability. Decision trees and calculations are presented to assist in tne development of the final SIRTF facility chopping requirements.

Citation Download Citation

Allan J. Mord "Observing Strategies For Sihtf: Implications For Facility Chopping Requirements", Proc. SPIE 0509, Cryogenic Optical Systems and Instruments I, (1 February 1985); https://doi.org/10.1117/12.944978

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