基于硬件相关处理机的高速实时动态多目标条纹搜索技术研究

Very long baseline interferometry(VLBI) , which is an important radio astronomy technology with a high spatial resolution and an international high-precision measurements used in deep-space probes, can improve deep space targets orbit determination accuracy greatly when combined with traditional techniques. Precise orbit and models is a prerequisite for the implementation of the VLBI technique. Prediction error of the track system and the observation system errors may cause it hard to obtain the relevant fringe when using the calculated model directly. The fringe search must now be constructed for more accurate delay model and dalay rate model to complete satellite signal correlate and obtain a high-quality interference fringes. The project plans to achieve the high speed and real time fringe search of dynamic multi-object technology base on the Uniboard which was developed by Joint Institute for VLBI in Europe (JIVE). The fringe search module will supply more precise delay and delay rate for hardware correlator to complete the detector signal processing in order to obtain high-quality interference fringes and get accurate measurement results.

甚长基线干涉测量（VLBI）是重要的射电天文技术，具有极高的空间分辨率，是国际上广泛采用的深空探测器高精度测量手段，与传统技术的结合可以大大提高深空目标的定轨精度。精确的轨道和模型是VLBI技术实施的先决条件。轨道预报值误差以及观测系统存在误差都可能导致相关处理机在直接利用预报轨道计算的模型值进行相关处理时很难获得相关条纹。本项目计划在欧洲VLBI联合研究所（JIVE）已经开发完成的Uniboard开发板上利用其高性能的处理单元实现高速实时动态多目标的条纹搜索功能，利用条纹搜索模块构造更精确的时延、时延率模型，用于硬件相关处理机完成探测器的信号处理，从而获得优质的干涉条纹，得到高精度的测量结果。

甚长基线干涉测量（VLBI）是重要的射电天文技术，具有极高的空间分辨率，是国际上广泛采用的深空探测器高精度测量手段，与传统技术的结合可以大大提高深空目标的定轨精度。精确的轨道和模型是VLBI技术实施的先决条件。轨道预报值误差以及观测系统存在误差都可能导致相关处理机在直接利用预报轨道计算的模型值进行相关处理时很难获得相关条纹，此时必须进行条纹搜索，构造较精确的时延、时延率模型，引导处理机完成卫星信号处理，从而获得优质的干涉条纹。本项目在欧洲VLBI联合研究所（JIVE）已经研制完成的Uniboard开发板上利用其高性能的处理单元实现高速实时动态多目标的条纹搜索功能，利用条纹搜索模块构造更精确的时延、时延率模型，用于硬件相关处理机完成对探测器的信号处理，从而获得了优质的干涉条纹，得到高精度的测量结果。