Inflight characterization and correction of Planck/HFI analog to digital converter nonlinearity

A. Sauvé; F. Couchot; G. Patanchon; L. Montier

doi:10.1117/12.2232671

19 July 2016 Inflight characterization and correction of Planck/HFI analog to digital converter nonlinearity

A. Sauvé, F. Couchot, G. Patanchon, L. Montier

Proceedings Volume 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII; 99143E (2016) https://doi.org/10.1117/12.2232671
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The Planck Satellite launched in 2009 was targeted to observe the anisotropies of the Cosmic Microwave Back-ground (CMB) to an unprecedented sensitivity. While the Analog to Digital Converter of the HFI (High Frequency Instrument) readout electronics had not been properly characterized on ground, it has been shown to add a systematic nonlinearity effect up to 2% of the cosmological signal. This was a limiting factor for CMB science at large angular scale. We will present the in-flight analysis and method used to characterize and correct this effect down to 0.05% level. We also discuss how to avoid this kind of complex issue for future missions.

Citation Download Citation

A. Sauvé, F. Couchot, G. Patanchon, and L. Montier "Inflight characterization and correction of Planck/HFI analog to digital converter nonlinearity", Proc. SPIE 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, 99143E (19 July 2016); https://doi.org/10.1117/12.2232671

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