Low Frequency Measurements of the Cosmic Microwave Background Radiation

宇宙微波背景辐射的低频测量

• 批准号: 8716548
• 负责人: George Smoot
• 金额: $ 16.85万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-01-15 至 1991-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8716548&HistoricalAwards=false
• 关键词: Low; Frequency; Measurements; Cosmic; Microwave

This project will measure the shape of the Cosmic Microwave Background Radiation (CMBR) at four frequencies, 1.5 GHz, 3.7 GHz, 10 GHz, and 90 GHz. Deviations from a blackbody spectrum have been reported, which if confirmed would alter our view of how the universe was formed. The South Pole is the best site for this measurement due to the extremly cold, and therefore dry, atmosphere, and the ability of the instruments to view one portion of the sky continuously through a constant thickness of the atmosphere. It is also the quietest spot on earth for the radio frequencies chosen. The project will also make quantitative measurements of atmospheric noise that will be of great value for future investigators.

该项目将在四个频率（1.5 GHz，3.7 GHz，10 GHz和90 GHz）下测量宇宙微波背景辐射（CMBR）的形状。 已经报道了与黑体频谱的偏差，如果确认会改变我们对宇宙的形成方式的看法。 由于极端寒冷，干燥的气氛，以及乐器通过大气的恒定厚度连续观察天空的一部分，南极是该测量的最佳地点。 对于选择的无线电频率，它也是地球上最安静的地方。 该项目还将对大气噪声进行定量测量，这对未来的研究人员将具有很大的价值。