Modelling ground pickup for microwave telescopes
| العنوان: | Modelling ground pickup for microwave telescopes |
|---|---|
| المؤلفون: | Alexandre E. Adler, Adriaan J. Duivenvoorden, Jon E. Gudmundsson |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | Microwave telescopes require an ever-increasing control of experimental systematics in their quest to measure the Cosmic Microwave Background (CMB) to exquisite levels of precision. One important systematic for ground and balloon-borne experiments is ground pickup, where beam sidelobes detect the thermal emission of the much warmer ground while the main beam is scanning the sky. This generates scan-synchronous noise in experiment timestreams, which is difficult to filter out without also deleting some of the signal from the sky. Therefore, efficient modelling of pickup can help guide the design of experiments and of analysis pipelines. In this work, we present an extension to the beamconv algorithm that enables us to generate time-ordered data (TOD) from beam-convolved sky and ground maps simultaneously. We simulate ground pickup for both a ground-based experiment and a telescope attached to a stratospheric balloon. Ground templates for the balloon experiment are obtained by re-projecting satellite maps of the Earth's microwave emission. 10 pages, 6 figures, paper 12190-165 for the "SPIE AT+I 2022 mm, sub-mmm, and Far-Infrared Detectors and Instrumentation for Astronomy XI" conference |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::314785026a0b98e79e96cb93e168e160 http://arxiv.org/abs/2207.05662 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....314785026a0b98e79e96cb93e168e160 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |