Goldstone Apple Valley Radio Telescope (GAVRT) is a science education partnership among NASA, the Jet Propulsion Laboratory (JPL), and the Lewis Center for Educational Research (LCER), offering unique opportunities for K -12 students and their teachers. The GAVRT program operates a 34-m radio telescope with a wide-band, low noise receiver, which is tunable in four independent dual-polarization bands from 3 to 14 GHz. The annular eclipse of the Sun on 2012 May 20 was observed by GAVRT as part of education outreach. In this paper we present the results of this eclipse data and discuss the multi-wavelength strip scan brightness distribution across three active regions. We derive the source brightness temperatures and angular sizes as a function of frequency and interpret the results in terms of the gyroresonance mechanism. We show examples of the increasing brightness and widening of source size (isogauss surface) with wavelength as evidence for gyroresonance emission layers of broader (diverging ) isogauss surfaces of the magnetic field geometry in the corona above solar surface. We present an example how the derived frequency - brightness temperature relationship is translated to a magnetic field - brightness temperature relationship under the frame-work of gyroresonance emission. Our results demonstrate the usefulness of GAVRT bands as excellent probes to study the layers of the corona above the active regions (sun spots), in particular the prevalence of the gyroresonance mechanism. Our results provide a frame-work for multiwavelength cm-wavelength eclipse observations and illustrate how the GAVRT program and K- 12 student/teacher participation can produce science data useful to the scientific community and science missions.

中文翻译：

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金石苹果谷射电望远镜观测 2012 年日食：活动区域 cm-λ 回旋共振发射的多波长研究

金石苹果谷射电望远镜 (GAVRT) 是 NASA、喷气推进实验室 (JPL) 和刘易斯教育研究中心 (LCER) 之间的科学教育合作伙伴，为 K -12 学生及其老师提供独特的机会。GAVRT 计划运行一个 34 米射电望远镜，该望远镜带有宽带、低噪声接收器，可在 3 至 14 GHz 的四个独立双极化频段内进行调谐。GAVRT 在 2012 年 5 月 20 日观测了日环食，作为教育推广的一部分。在本文中，我们展示了日食数据的结果，并讨论了三个活动区域的多波长条带扫描亮度分布。我们推导出源亮度温度和角度大小作为频率的函数，并根据陀螺共振机制解释结果。我们展示了亮度增加和光源尺寸（等高斯表面）随波长变宽的例子，作为太阳表面上方日冕中磁场几何形状的更宽（发散）等高表面的陀螺共振发射层的证据。我们举例说明了如何在陀螺共振发射框架下将导出的频率-亮温关系转换为磁场-亮温关系。我们的结果证明了 GAVRT 波段作为研究活动区域（太阳黑子）上方日冕层的优秀探针的有用性，特别是陀螺共振机制的普遍性。