Low Earth Orbit Satellite Networks such as Starlink promise to provide world-wide Internet access. While traditionally designed for stationary use, a new dish, released in April 2023 in Europe, provides mobile Internet access including in-motion usage, e.g., while mounted on a car. In this paper, we design and build a mobile measurement setup. Our goal is to fully autonomously conduct continuous Starlink measurements while the car is in motion. We share our practical experiences, including challenges regarding the permanent power supply. We measure the Starlink performance over the span of two months from mid-January to mid-March 2024 when the car is in motion. The measurements consist of all relevant network parameters, such as the download and upload throughput, the RTT, and packet loss, as well as detailed power consumption data. We analyze our dataset to assess Starlink's mobile performance in Central Europe, Germany, and compare it to stationary measurements in proximity. We find that the mobile performance is significantly worse than stationary performance. The power consumption of the new dish is higher, but seems to be more correlated to the heating function of the dish than to the speed of the vehicle.

翻译：低地球轨道卫星网络（如星链）承诺提供全球互联网接入。尽管传统上为固定使用而设计，但2023年4月欧洲发布的新型天线支持包括移动中（例如安装在汽车上）在内的移动互联网接入。本文设计并搭建了一套移动测量装置，旨在实现汽车行驶过程中完全自主的连续星链测量。我们分享了实践经验，包括永久性电源供应方面的挑战。我们测量了2024年1月中旬至3月中旬两个月间汽车行驶时的星链性能。测量涵盖了所有相关网络参数，如下行与上行吞吐量、往返时延、丢包率以及详细的功耗数据。我们通过数据集分析评估了星链在德国中欧地区的移动性能，并将其与附近的固定测量结果进行对比。研究发现移动性能显著低于固定性能。新型天线的功耗更高，但其与天线加热功能的关联性似乎强于与车速的关联性。