The Planck-LFI instrument: analysis of the 1/f noise and implications for the scanning strategy

The Planck-LFI instrument: analysis of the 1/f noise and implications for the scanning strategy
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Planck-LFI 仪器:1/f 噪声分析及其对扫描策略的影响

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发表时间:
1999
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通讯作者:
E. Hivon
E. Hivon
中科院分区:
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文献类型:
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作者:
D. Maino;C. Burigana;M. Maltoni;B. Wandelt;K. Gorski;M. Malaspina;M. Bersanelli;N. Mandolesi;A. Banday;E. Hivon

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我们研究了噪声对普朗克低频仪器(LFI)观测的影响(Mandolesi等人, ),并描述了一种简单的方法,可以在一些不同的扫描策略下从地图上消除条带效应。当望远镜光轴与自旋轴的夹角小于90°(即)时,对焦平面内的所有接收器都有较好的去条纹效率,且残留噪声有所降低。在这种配置中,每个通道可以单独实现全天空覆盖,并具有5°的自旋轴进动,以保持恒定的太阳方位角。
We study the impact of noise on the Planck Low Frequency Instrument (LFI) observations (Mandolesi et al.  ) and describe a simple method for removing striping effects from the maps for a number of different scanning strategies. A configuration with an angle between telescope optical axis and spin-axis just less than 90° (namely ) shows good destriping efficiency for all receivers in the focal plane, with residual noise degradation . In this configuration, the full sky coverage can be achieved for each channel separately with a 5° spin-axis precession to maintain a constant solar aspect angle.