{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/design-of-the-full-sky-scanning-strategy-and","title":"Design of the full-sky scanning strategy and systematic effect control in a cosmic microwave background probe","arxiv_id":"2503.03176","date":"2025-03-05","proceeding":null,"authors":["Yusuke Takase"],"abstract":"The quest for primordial $B$-mode polarization signatures in the Cosmic Microwave Background (CMB) is a major goal of contemporary cosmology. Detecting these signatures would confirm primordial gravitational waves and allow precise determination of the tensor-to-scalar ratio, $r$, which is crucial for distinguishing between inflationary models. This requires high-precision, full-sky observations from space-based platforms to avoid atmospheric fluctuations and windows. Since $B$-mode signatures are much fainter than CMB temperature anisotropies, their detection requires well-designed calibration and mitigation strategies. Next-generation space observatories such as LiteBIRD, which use Half-Wave Plate (HWP) modulation technology, represent a significant advance. This technology allows single-detector observations, eliminating the need for pair-differential detection and its associated systematic complexities. The study begins with the optimization of scanning strategy parameters for missions with HWP to improve in-flight calibration, suppress systematic effects, and develop robust null-test methods. In addition, we present a method for calculating the impact of systematic effects on the estimation of $r$ using the SBM (Spin-Based Map-making) software framework, which performs fast map-making in spin space. This method allows the decomposition and elimination of systematic effects in terms of spins, and we demonstrate the elimination of several systematic effects.","url_abs":"https://arxiv.org/abs/2503.03176v2","url_pdf":"https://arxiv.org/pdf/2503.03176v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"design-of-the-full-sky-scanning-strategy-and","repo_url":"https://github.com/yusuke-takase/SBM","is_official":1,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}