Is Incoherent Scatter Feasible Using the UTR-2 Antenna and the SURA Transmitter?

9319919凯利探索性研究小额赠款的目的是利用位于乌克兰哈尔科夫附近的一台巨型射电望远镜，计划和实施首次在20-25兆赫频率范围内进行非相干散射观测的关键部分。这项工作与塔尔萨大学和下诺夫哥罗德无线电物理研究所(NIRFI)的联合提案密切相关。根据后一项提议，将在俄罗斯的Vasil“Sursk建造一个天线场。在完成三分之一的投影天线场后，将进行联合实验，以验证可以在这里描述的双基地模式下进行非相干散射的概念。该项目的结果将是评估整个系统性能的关键，整个系统将具有三倍的功率和三倍的天线尺寸。反过来，这些数据将使国家科学基金会能够衡量在一个可能的国际设施中采取下一步步骤的重要性，该设施用于探测具有非相干散射的内部磁层和具有相干散射的极光的来源。这项建议适用于SGER赠款，因为它显然是探索性的，风险很高。在这个频率上从未进行过非相干散射雷达测量，也没有办法用雷达方法确定等离子体层外边界的位置。这项实验将使地面系统能够清楚地评估跟踪这一重要边界的能力。此外，乌克兰科学家目前的处境非常困难，这使得这种合作努力在不久的将来变得非常重要。除其他外，需要立即支持大型UTR-2天线阵(射电望远镜)，它对世界射电科学界的价值是独一无二的，对这里所述的项目至关重要。***

9319919 Kelley The purpose of this Small Grant for Exploratory research (SGER) is to plan and carry out a key component to the first incoherent scatter observations in the frequency range 20-25 MHz by using a huge Radio Telescope located near Kharkov, Ukraine. The work is closely coupled to the joint proposal from Tulsa University and te Radiophysical Research institute (NIRFI) in Nizhny Novgorod. Under the latter proposal an antenna field will be constructed at Vasil"sursk in Russia. Upon completion of one-third of the projected antenna field, a joint experiment will be carried outto test the notion that incoherent scatter can be carried out in the bi-static mode described here. The results of the project will be crucial in assessing the performance of the full system which will have three times the power and three times the antenna size. In turn these data will allow the NSF to gauge the importance of taking the next steps in a possible International facility for probing the inner magnetosphere with incoherent scatter and the source of the aurora with coherent scatter. The proposal is appropriate for a SGER grant since it is clearly exploratory and high risk. There has never been an incoherent scatter radar measurement at this frequency nor has there been a way to determine the location of the outer boundary of the plasmasphere by radar methods. This experiment will allow a clear assessment of the ability of a ground based system to track this important boundary. In addition the very difficult present situation for scientists in the Ukraine makes such a cooperative effort very important in the nearest future. Among other things, immediate support is needed for the large UTR-2 antenna array (radio telescope) whose value for the world radio-scientific community is unique and which is critically important for the project described here. ***