GASV：一种用于大地测量和天体测量的新型VLBI分析软件
GASV: A New VLBI analysis software for Geodesy and Astrometry
AI总结：
GASV是一种基于Python的新型VLBI分析软件，能够高效处理VLBI数据，实现高精度的大地测量和天体测量参数估计。
摘要：
我们介绍了GASV，一种基于Python的新型软件包，专门用于分析甚长基线干涉（VLBI）数据。该软件在设计时考虑了安装简便和用户友好性，支持管道和交互式处理模式。软件处理VLBI基线延迟和速率，采用标准格式如HOPS输出和NGS卡片文件，以估计关键的大地测量和天体测量参数，包括站坐标、地球定向参数、源坐标、钟参数和大气模型。我们评估了GASV的能力和性能，证明其对IVS INT、Regular和CONT会话的参数估计精度与BKG和USNO的VLBI分析中心相当。作为一项最先进的工具，GASV不仅能够实现高质量的单次会话数据处理，还支持长期SINEX文件的全球分析，生成天体参考框架和地面参考框架的解决方案，具有可靠的精度。
英文摘要：
We present GASV, a novel Python-based software package specifically designed for the analysis of Very Long Baseline Interferometry (VLBI) data. Developed with ease of installation and user friendliness in mind, GASV supports both pipeline and interactive processing modes. The software processes VLBI baseline delays and rates in standard formats such as HOPS outputs and NGS card files to estimate key geodetic and astrometric parameters, including station coordinates, Earth Orientation Parameters, source coordinates, clock parameters, and atmospheric models. We evaluate the capabilities and performance of GASV, demonstrating that its parameter estimation accuracy for IVS INT, Regular, and CONT sessions is comparable to that achieved by the VLBI analysis centers at BKG and USNO. As a state-of-the-art tool, GASV not only enables high-quality single-session data processing but also but also supports global analyses of long-term SINEX files, generating Celestial Reference Frame and Terrestrial Reference Frame solutions with reliable accuracy.
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