应用于深空探测的VLBI技术

VLBI Technique Applied in Deep Space Exploration

分析了河外射电源与空间飞行器甚长基线干涉测量(VLBI)跟踪与资料解析的差异,包括信号波前形式、频谱特征、误差修正方式、解算参数类型和软件实时性需求等。讨论了应用于深空探测的包括宽带、窄带、同波束、多频点、多基线相位参考、连线干涉和局部参考架等多种差分VLBI技术,可作为VLBI技术在我国深空探测应用中技术设计参考。

The differences in the VLBI tracking and data analysis between extragalactic radio sources and spacecraft are analyzed concerning shape of wave front of signals,frequency spectrum characteristics,way of error correction in observations,type of unknown parameters,real-time requirements of software and so on.The various differential VLBI techniques applied in deep space exploration are discussed,including broad and narrow bands,same beam,multi-frequency,multi-baseline phase referencing,connected antenna array and local reference frame,which could be as reference in the technical design and data analysis of the application of VLBI technique to the deep space exploration of China.