Simulation of the Earth's radio-leakage from mobile towers as seen from selected nearby stellar systems
Simulation of the Earth's radio-leakage from mobile towers as seen from selected nearby stellar systems
复制标题
从选定的附近恒星系统观察到的移动塔对地球无线电泄漏的模拟
DOI：
10.1093/mnras/stad378
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发表时间：
2023
影响因子：
4.8
通讯作者：
Saide R
中科院分区：
文献类型：
--
作者：
Saide R
移动的通信塔是一个相对较新的，但不断增长的贡献者总的无线电泄漏与行星地球。我们调查的整体功率贡献的移动的通信塔地球的无线电泄漏预算，从不同的附近恒星系统的选择。我们使用移动的塔位置的公开数据创建了这种泄漏的模型。该模型网格的行星表面成小，计算管理的地区，假设一个简单的集成传输模式的移动的天线。在这个模型中，这些移动的塔区域随着地球的旋转而上升和下降。通过这种方式，确定了地球的动态功率谱，在所有蜂窝频带上求和。我们从三个不同的观测点-- HD 95735、巴纳德星星和半人马座阿尔法A--计算出了这个动态功率谱。我们的初步结果表明，从移动的塔泄漏到空间的峰值功率为104 GW。这与从HD 95735看到的源自中国东海岸的长期演进（LTE）移动的塔技术相关联。我们证明，移动的塔泄漏是周期性的，方向相关的，目前无法检测到附近的文明位于10光年的地球，使用仪器与灵敏度类似的绿色银行望远镜。我们计划扩展我们的模型，以包括更强大的5G移动的系统，雷达装置，地面上行链路（包括深空网络）和各种类型的卫星服务，包括低地球轨道星座，如Starlink和OneWeb。
Mobile communication towers represent a relatively new but growing contributor to the total radio-leakage associated with planet Earth. We investigate the overall power contribution of mobile communication towers to the Earth’s radio leakage budget, as seen from a selection of different nearby stellar systems. We created a model of this leakage using publicly available data of mobile tower locations. The model grids the surface of the planet into small, computationally manageable regions, assuming a simple integrated transmission pattern for the mobile antennas. In this model, these mobile tower regions rise and set as the Earth rotates. In this way, a dynamic power spectrum of the Earth was determined, summed over all cellular frequency bands. We calculated this dynamic power spectrum from three different viewing points – HD 95735, Barnard’s star, and Alpha Centauri A. Our preliminary results demonstrate that the peak power leaking into space from mobile towers is ∼4GW. This is associated with Long Term Evolution (LTE) mobile tower technology emanating from the East Coast of China as viewed from HD 95735. We demonstrate that the mobile tower leakage is periodic, direction dependent, and could not currently be detected by a nearby civilization located within 10 light-years of the Earth, using instrumentation with a sensitivity similar to the Green Bank Telescope. We plan to extend our model to include more powerful 5G mobile systems, radar installations, ground based up-links (including the Deep Space Network), and various types of satellite services, including low-Earth orbit constellations, such as Starlink and OneWeb.