Spectrum Management for the Protection of Radio Astronomy

这项建议包括两个领域的工作，一是了解无线电频率干扰(RFI)对宇宙学实验的影响，特别是卫星等星载通信平台的RFI；二是在国内和国际上开展频谱管理活动。这一为期两年的项目的重点是寻求电磁频谱的主动和被动利用共存，包括两个主要方面。第一个研究重点是测量和分析卫星下行链路对宇宙微波背景(CMB)天文学的影响，特别是与单盘CMB实验有关的类。另一个主要推动力是国内和国际频谱管理，进行技术研究和参与射电天文保护工作，特别是CMB实验。技术研究将包括一个带有频率发生器的试点部分，以便以预期的卫星下行链路频率发送信号，以观察对类别数据管道的影响。这位飞行员随后将对卫星进行实际观测，利用遥测来协调观测。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小组提供技术专门知识：研究小组7(科学服务)、研究小组3(传播模型)和研究小组4(卫星)。PI将评估是否可以修改无线电静默区规则，以改善对射电天文的保护(在美国和智利)，并参加许多国际电信会议和会议。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势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.