Scholarlink

The ILRS (International Laser Ranging Service) regularly contributes to the maintenance of the most recent realization of ITRS, the International Terrestrial Reference Frame (ITRF), providing daily and weekly series of station coordinates and Earth Orientation Parameters (EOPs) estimated using LAGEOS-1/2 and Etalon-1/2 Satellite Laser Ranging (SLR) data. The products are computed at the ILRS primary Combination Center (CC) hosted by ASI, the Italian Space Agency, by combining the contributions from all the individual ILRS Analysis Centers (ACs). The inclusion of satellite LARES-2 SLR data, designed for high-accuracy satellite laser ranging, raises the opportunity to improve the quality of the geodetic products delivered by ILRS. To introduce the satellite in the operational products, the systematic errors for LARES-2 were characterized within a specific pilot project organized by the ILRS Analysis Standing Committee (ASC). An ad hoc model for long-term range bias, closely related to the target signature model, has been defined using the ACs and CC time series specifically prepared to monitor the systematic errors for all the satellites used, including LARES-2. The identified systematics errors are collected into an extended ILRS Data Handling File (DHF) that will enable the LARES-2 as the fifth satellite in all the ILRS operational products. The paper assesses the impact of the introduction of LARES-2 SLR data in daily and weekly ILRS test products with respect to the operational well-performing 4-satellite solutions, looking at station coordinates residuals and network results. The main results, making valuable the introduction of LARES-2 in ILRS official products and its contribution to ITRF2020 update, are the reduction of the 4-satellite root mean square error computed for the core station coordinates by approximatively 18% when LARES-2 is considered and the improvement of the RMS differences for X and Y components of polar motion and LOD observed with respect to 4-satellite, both in the case of daily and weekly products, considering as reference the values provided by USNO.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Strategy to Include a New Geodetic Target in ILRS Official Products: An Impact Assessment of LARES-2 Inclusion

  • 章节

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

查看全文
  • A. Basoni,
  • V. Luceri,
  • D. Sarrocco,
  • F. Vespe

摘要

The ILRS (International Laser Ranging Service) regularly contributes to the maintenance of the most recent realization of ITRS, the International Terrestrial Reference Frame (ITRF), providing daily and weekly series of station coordinates and Earth Orientation Parameters (EOPs) estimated using LAGEOS-1/2 and Etalon-1/2 Satellite Laser Ranging (SLR) data. The products are computed at the ILRS primary Combination Center (CC) hosted by ASI, the Italian Space Agency, by combining the contributions from all the individual ILRS Analysis Centers (ACs). The inclusion of satellite LARES-2 SLR data, designed for high-accuracy satellite laser ranging, raises the opportunity to improve the quality of the geodetic products delivered by ILRS. To introduce the satellite in the operational products, the systematic errors for LARES-2 were characterized within a specific pilot project organized by the ILRS Analysis Standing Committee (ASC). An ad hoc model for long-term range bias, closely related to the target signature model, has been defined using the ACs and CC time series specifically prepared to monitor the systematic errors for all the satellites used, including LARES-2. The identified systematics errors are collected into an extended ILRS Data Handling File (DHF) that will enable the LARES-2 as the fifth satellite in all the ILRS operational products. The paper assesses the impact of the introduction of LARES-2 SLR data in daily and weekly ILRS test products with respect to the operational well-performing 4-satellite solutions, looking at station coordinates residuals and network results. The main results, making valuable the introduction of LARES-2 in ILRS official products and its contribution to ITRF2020 update, are the reduction of the 4-satellite root mean square error computed for the core station coordinates by approximatively 18% when LARES-2 is considered and the improvement of the RMS differences for X and Y components of polar motion and LOD observed with respect to 4-satellite, both in the case of daily and weekly products, considering as reference the values provided by USNO.