Satellite positioning geodesy has been undergoing a major transformation in recent years. The arrival of new GNSS constellations, notably the European Galileo declared operational in 2016 and the Chinese Beidou in 2018, as well as the deployment of GPS Block III the same year, marks the availability of new signals that offer a host of new prospects in terms of localization accuracy and speed. However, these new observables must be appropriately integrated and archived for future use. This problem no longer necessarily arises for worldwide tracking networks: They usually use homogeneous hardware and are components of the unified IGS’s global network, benefiting from its well-established standards. However, correctly assimilating the new GNSS signals remains an issue for local and campaign-based network operators. Their networks are very often heterogeneous, comprising different generations of receivers from multiple manufacturers. This situation complicates a uniformized data workflow. At the same time, the end of support in 2019 of the teqc utility developed by UNAVCO (now EarthScope since 2023) is also changing the game regarding GNSS data pre-processing. teqc was massively used as a “Swiss army knife” for RINEX conversion from proprietary vendor formats, metadata edition and quality control, but since no similar unified utility will probably ever be developed, alternatives must be found to replace it effectively. Here, we present two acquisition and pre-processing tools designed to replace some teqc functionalities and enable new constellations and their associated signals’ observations to be adequately considered in a unified chain. The first tool is rinexmod, a RINEX header editing utility that substitutes teqc. It is compatible with versions 2 and 3/4, correctly handles the long naming convention, and can directly exploit station sitelogs as a source of metadata. The second tool is autorino (for Assisted Unloading, Treatment, and Organization of RINEX Observations), which is designed for automated download and conversion of raw data from the main manufacturers’ receivers (Leica, Septentrio, Topcon, Trimble, and BINEX) based on their respective official conversion utilities. A special focus is put on conversion to RINEX3/4 and near real-time capability (download frequency up to 5 min).

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

rinexmod & autorino: Two Tools to Enable Multi-GNSS and Near Real-Time Data Acquisition and Pre-processing

  • Pierre Sakic,
  • Patrice Boissier,
  • Jean-Marie Saurel,
  • Cyprien Griot,
  • Diane Pacaud,
  • Lorène Boulvais-Abbas

摘要

Satellite positioning geodesy has been undergoing a major transformation in recent years. The arrival of new GNSS constellations, notably the European Galileo declared operational in 2016 and the Chinese Beidou in 2018, as well as the deployment of GPS Block III the same year, marks the availability of new signals that offer a host of new prospects in terms of localization accuracy and speed. However, these new observables must be appropriately integrated and archived for future use. This problem no longer necessarily arises for worldwide tracking networks: They usually use homogeneous hardware and are components of the unified IGS’s global network, benefiting from its well-established standards. However, correctly assimilating the new GNSS signals remains an issue for local and campaign-based network operators. Their networks are very often heterogeneous, comprising different generations of receivers from multiple manufacturers. This situation complicates a uniformized data workflow. At the same time, the end of support in 2019 of the teqc utility developed by UNAVCO (now EarthScope since 2023) is also changing the game regarding GNSS data pre-processing. teqc was massively used as a “Swiss army knife” for RINEX conversion from proprietary vendor formats, metadata edition and quality control, but since no similar unified utility will probably ever be developed, alternatives must be found to replace it effectively. Here, we present two acquisition and pre-processing tools designed to replace some teqc functionalities and enable new constellations and their associated signals’ observations to be adequately considered in a unified chain. The first tool is rinexmod, a RINEX header editing utility that substitutes teqc. It is compatible with versions 2 and 3/4, correctly handles the long naming convention, and can directly exploit station sitelogs as a source of metadata. The second tool is autorino (for Assisted Unloading, Treatment, and Organization of RINEX Observations), which is designed for automated download and conversion of raw data from the main manufacturers’ receivers (Leica, Septentrio, Topcon, Trimble, and BINEX) based on their respective official conversion utilities. A special focus is put on conversion to RINEX3/4 and near real-time capability (download frequency up to 5 min).