论文标题
丽莎测量和仪器模拟的统一模型
Unified model for the LISA measurements and instrument simulations
论文作者
论文摘要
丽莎（Lisa）是一个基于空间的MHz引力波观测站，计划于2034年推出。它有望成为同类探测器的第一个检测器，并将在仪器和数据分析中提出独特的挑战。对LISA数据的准确飞行前模拟是仪器和分析方法开发的重要组成部分。模拟必须包括完整测量和分析链的详细模型，并捕获影响仪器性能和处理算法的主要特征。在这里，我们提出了一个新模型，该模型首次包括对具有现实轨道的参考框架的适当相对论处理；机载时钟和时钟同步测量的模型；正确建模总激光频率，包括激光锁定，频率计划和多普勒偏移；更好地处理机载处理和更新的噪声模型。然后，我们介绍了该模型Lisanode和Lisa仪器的两个实现。我们证明，TDI处理成功地从明显更现实和复杂的模拟数据中恢复了重力波信号。丽莎社区已经广泛使用了Lisanode和Lisa仪器，例如，目前为LISA数据挑战提供了模拟数据。
LISA is a space-based mHz gravitational-wave observatory, with a planned launch in 2034. It is expected to be the first detector of its kind, and will present unique challenges in instrumentation and data analysis. An accurate preflight simulation of LISA data is a vital part of the development of both the instrument and the analysis methods. The simulation must include a detailed model of the full measurement and analysis chain, capturing the main features that affect the instrument performance and processing algorithms. Here, we propose a new model that includes, for the first time, proper relativistic treatment of reference frames with realistic orbits; a model for onboard clocks and clock synchronization measurements; proper modeling of total laser frequencies, including laser locking, frequency planning and Doppler shifts; better treatment of onboard processing and updated noise models. We then introduce two implementations of this model, LISANode and LISA Instrument. We demonstrate that TDI processing successfully recovers gravitational-wave signals from the significantly more realistic and complex simulated data. LISANode and LISA Instrument are already widely used by the LISA community and, for example, currently provide the mock data for the LISA Data Challenges.
