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This paper examines recent enhancements to the infrastructure of the Satellite Laser Ranging (SLR) Station 1884 in Riga. In 2024–2025, substantial repairs were made to the clock cellar, improving insulation to control relative humidity and equipping it for the potential permanent deployment of measurement apparatus, such as a gravimeter, GNSS receivers, and an additional GNSS-based time and frequency source. New meteorological equipment was deployed in October 2024, comprising a weather station, an absolute barometer, an upgraded groundwater-level measurement device, and a soil moisture sensor. All sensor metadata and corresponding measurements are systematically recorded and archived in a relational database and in log files. On August 5, 2025, the GNSS geodetic reference receiver was upgraded to the latest available model. In 2024, the gravimetric underground site was assessed as a prospective site for a seismic monitoring station. Preliminary findings indicate that seismic measurements were of acceptable quality at night; however, traffic noise from an adjacent street significantly affects measurements during daylight hours.

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Recent Geodetic Infrastructure Improvements in the Satellite Laser Station Riga

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  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • K. Salmins,
  • J. Kaulins,
  • S. Melkov

摘要

This paper examines recent enhancements to the infrastructure of the Satellite Laser Ranging (SLR) Station 1884 in Riga. In 2024–2025, substantial repairs were made to the clock cellar, improving insulation to control relative humidity and equipping it for the potential permanent deployment of measurement apparatus, such as a gravimeter, GNSS receivers, and an additional GNSS-based time and frequency source. New meteorological equipment was deployed in October 2024, comprising a weather station, an absolute barometer, an upgraded groundwater-level measurement device, and a soil moisture sensor. All sensor metadata and corresponding measurements are systematically recorded and archived in a relational database and in log files. On August 5, 2025, the GNSS geodetic reference receiver was upgraded to the latest available model. In 2024, the gravimetric underground site was assessed as a prospective site for a seismic monitoring station. Preliminary findings indicate that seismic measurements were of acceptable quality at night; however, traffic noise from an adjacent street significantly affects measurements during daylight hours.