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首页> 外文期刊>The Astrophysical Journal. Supplement Series >Three-year Wilkinson Microwave Anisotropy Probe (WMAP)(1) observations: Beam profiles, data processing, radiometer characterization, and systematic error limits
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Three-year Wilkinson Microwave Anisotropy Probe (WMAP)(1) observations: Beam profiles, data processing, radiometer characterization, and systematic error limits

机译：三年威尔金森微波各向异性探测器（WMAP）（1）观测：光束剖面，数据处理，辐射计表征和系统误差极限

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摘要

The WMAP satellite has completed 3 years of observations of the cosmic microwave background radiation. The 3 year data products include several sets of full sky maps of the Stokes I, Q, and U parameters in five frequency bands, spanning 23-94 GHz, and supporting items such as beam window functions and noise covariance matrices. The processing used to produce the current sky maps and supporting products represents a significant advancement over the first-year analysis and is described herein. Improvements to the pointing reconstruction, radiometer gain modeling, window function determination, and radiometer spectral noise parameterization are presented. A detailed description of the updated data processing that produces maximum likelihood sky map estimates is presented, along with the methods used to produce reduced resolution maps and corresponding noise covariance matrices. Finally, two methods used to evaluate the noise of the full resolution sky maps are presented along with several representative year-to-year null tests, demonstrating that sky maps produced from data from different observational epochs are consistent.
机译：WMAP卫星已经完成了对宇宙微波背景辐射的三年观测。三年的数据产品包括在23-94 GHz范围内的五个频段上的Stokes I，Q和U参数的几套全天候地图，并支持波束窗函数和噪声协方差矩阵等支持项目。用于生成当前天空图和支持产品的处理代表了第一年分析的重大进步，并在此处进行了描述。提出了对指向重建，辐射计增益建模，窗口函数确定以及辐射计频谱噪声参数化的改进。给出了产生最大似然天空图估计值的更新数据处理的详细说明，以及用于生成降低的分辨率图和相应的噪声协方差矩阵的方法。最后，介绍了两种用于评估全分辨率天空图噪声的方法，以及几种具有代表性的逐年空值测试，这表明由不同观测时期的数据生成的天空图是一致的。

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