Spectrum Management for the Protection of Radio Astronomy

该建议包含两个工作领域，一是努力了解无线电频率干扰对宇宙学实验的影响，特别是来自卫星等星载通信平台的无线电频率干扰，二是在国内和国际上开展频谱管理活动。 这个为期两年的项目的重点是追求电磁频谱的主动和被动使用之间的共存，包括两个主要方面。第一个是研究重点，侧重于测量和分析卫星下行链路对宇宙微波背景天文学的影响，特别是与单碟宇宙微波背景实验CLASS有关的影响。 另一个主要目标是国内和国际频谱管理，开展技术研究，并参与射电天文学保护工作，特别是CMB实验。 该技术研究将包括一个试点部分，其中包括一个频率发生器，以预期的卫星下行链路频率传输信号，以观察对CLASS数据管道的影响。 在这一试验之后，将利用遥测技术对卫星进行实际观测，以协调观测。 国际频谱管理工作将侧重于向国际电信联盟的三个主要研究组提供技术专门知识：第7研究组（科学服务）、第3研究组（传播模型）和第4研究组（卫星通信）。 PI将评估无线电静区规则是否可以修改以改善射电天文学的保护（在美国和智利），并参加众多的国际电信会议和大会。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This proposal contains two areas of work, one in pursuing understanding of the impact from radio frequency interference (RFI) to cosmological experiments, especially RFI from spaceborne communication platforms such as satellites, and second to engage in spectrum management activities domestically and internationally. This two-year project focuses on the pursuit of coexistence between active and passive uses of the electromagnetic spectrum, including two main aspects. The first is a research thrust focused on measurements and analysis of impact of satellite downlinks to cosmic microwave background (CMB) astronomy, especially related to the single-dish CMB experiment, CLASS. The other main thrust is domestic and international spectrum management, to perform technical studies and to participate in work for the protection of radio astronomy, especially the CMB experiments. The technical study will include a pilot portion with a frequency generator to transmit signals at expected satellite downlink frequencies to observe the impact on the CLASS data pipeline. This pilot would be followed up by actual observations of satellites, utilizing telemetry to coordinate the observations. The international spectrum management work would focus on provision of technical expertise to three main study groups at the International Telecommunications Union: Study Group 7 (Science Services), Study Group 3 (Propagation Models), and Study Group 4 (Satellites). The PI would evaluate whether radio quiet zone rules could be amended to improve protection for radio astronomy (both in the U.S. and in Chile) and participate in the numerous international telecommunications meetings and conferences.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.