Satélite de calibración para experimentos ultrasensibles de la polarización del fondo cósmico de microondas desde tierra
ABSTRACT: In this work, the implementation of a calibration satellite called CalSat is proposed. This mission will be flying in a low earth orbit (LEO) in a sun-synchronous orbit (SSO), and is designed to support ground-based experiments looking for Bmodes polarization signals in the cosmic microwav...
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| Formato: | tesis de maestría |
| Fecha de publicación: | 2022 |
| País: | España |
| Recursos: | Universidad de Cantabria (UC) |
| Repositorio: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unican.es:10902/29426 |
| Acesso em linha: | https://hdl.handle.net/10902/29426 |
| Access Level: | acceso abierto |
| Palavra-chave: | CMB polarization Calibration Micro-satellite B-modes |
| Resumo: | ABSTRACT: In this work, the implementation of a calibration satellite called CalSat is proposed. This mission will be flying in a low earth orbit (LEO) in a sun-synchronous orbit (SSO), and is designed to support ground-based experiments looking for Bmodes polarization signals in the cosmic microwave background (CMB). CalSat will emit a series of known polarized signals in order to calibrate experiments looking for the CMB polarization B-modes. Given their weakness, these experiments need a robust calibration processes in order to detect them. The celestial sources utilized nowadays to these calibrations, are not well characterized, which has direct impact on measurement uncertainties. The proposed calibration source on CalSat will be composed of three center frequencies, at 40, 90 and 150 GHz, which are frequencies of interest in the search of the expected B-modes. CalSat will improve the instrumental accuracy, which will facilitate the detection of the expected B-mode polarized signals, for instance reducing the polar angle error to the level of 1 arc-minute. In addition, given the proposed calibration strategy, CalSat will count with optimal visibility for ground-based experiments located in Atacama and Tenerife. Finally, our results about the thermal control, determine that CalSat will not saturate any studied experiment due to the thermal emission. |
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