<p>Low Earth Orbit (LEO) satellite networks have reshaped broadband access by extending connectivity to regions where terrestrial infrastructure is limited or unavailable. In tropical mountainous environments characterized by dense vegetation and abrupt elevation changes, however, the behavior of mobile LEO connectivity remains insufficiently explored. This paper presents an empirical performance assessment of Starlink connectivity along a round-trip route in the sub-equatorial region of Rio de Janeiro, Brazil, encompassing urban, semi-urban, and forested segments. A drive-test campaign was conducted to collect throughput, latency, jitter, packet loss, altitude, antenna orientation, obstruction time, and power consumption data under real mobility conditions. Beyond descriptive and correlation analyses, multivariate regression was employed to investigate partial effects and assess potential confounding between altitude and antenna obstruction. Results show uplink rates around 30 Mb/s, stable latency between 20 and 40&#xa0;ms, and highly variable downlink throughput ranging from near-zero to peaks above 250 Mb/s. The findings provide practical insights into the performance limits and reliability of LEO connectivity in rugged sub-equatorial scenarios, contributing evidence on the operational challenges of mobile satellite access in complex topographies.</p>

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Starlink on the move: performance analysis and characterization of LEO connectivity in sub-equatorial environments

  • Ricardo A. Lundgren,
  • Ricardo A. S. Filho,
  • Lucca V. Chatack,
  • Guilherme N. N. Barbosa,
  • Igor M. Moraes,
  • Nicollas R. de Oliveira,
  • Diogo M. F. Mattos

摘要

Low Earth Orbit (LEO) satellite networks have reshaped broadband access by extending connectivity to regions where terrestrial infrastructure is limited or unavailable. In tropical mountainous environments characterized by dense vegetation and abrupt elevation changes, however, the behavior of mobile LEO connectivity remains insufficiently explored. This paper presents an empirical performance assessment of Starlink connectivity along a round-trip route in the sub-equatorial region of Rio de Janeiro, Brazil, encompassing urban, semi-urban, and forested segments. A drive-test campaign was conducted to collect throughput, latency, jitter, packet loss, altitude, antenna orientation, obstruction time, and power consumption data under real mobility conditions. Beyond descriptive and correlation analyses, multivariate regression was employed to investigate partial effects and assess potential confounding between altitude and antenna obstruction. Results show uplink rates around 30 Mb/s, stable latency between 20 and 40 ms, and highly variable downlink throughput ranging from near-zero to peaks above 250 Mb/s. The findings provide practical insights into the performance limits and reliability of LEO connectivity in rugged sub-equatorial scenarios, contributing evidence on the operational challenges of mobile satellite access in complex topographies.