船载天线视角计算方法研究

天线视角是航天测量船的一个重要指标,通过分析各种视角遮挡情况,列出相应的视角计算方法,为船用天线视角设计提供了依据。同时本文分析了针对视角遮挡问题在船舶设计阶段应采取的措施。     

The Surface of Mercury as Seen by Mariner 10

The Mariner 10 spacecraft made three flyby passes of Mercury in 1974 and 1975. It imaged a little less than half of the surface and discovered Mercury had an intrinsic magnetic field. This paper briefly describes the surface of Mercury as seen by Mariner 10 as a backdrop to the discoveries made since then by ground-based observations and the optimistic anticipation of new discoveries by MESSENGER and BepiColombo spacecraft that are scheduled for encounter in the next decade.     

推进剂液位检测技术研究及仪器设计

通过对多种液位检测技术对比分析 ,提出一种利用超声波技术由储罐底部直接测量的方法 ,介绍了基于该方法的测量原理和仪器实现。此方法能够较好解决分界面明显的液位检测问题 ,但是对于一些气 -液界面模糊的介质的液位检测存在一定的问题 。     

Observations of supergiant fast X-ray transients with LOFT

Supergiant fast X-ray transients are a subclass of high mass X-ray binaries displaying a peculiar and still poorly understood extreme variability in the X-ray domain. These sources undergo short sporadic outbursts (_LX∼$L_{\text{X}}\sim$ 10³⁶–10³⁷ erg s⁻¹), lasting few ks at the most, and spend a large fraction of their time in an intermediate luminosity state at about _LX∼$L_{\text{X}}\sim$ 10³³–10³⁴ erg s⁻¹. The sporadic and hardly predictable outbursts of supergiant fast X-ray transients were so far best discovered by large field of view (FOV) coded-mask instruments; their lower luminosity states require, instead, higher sensitivity focusing instruments to be studied in sufficient details. In this contribution, we provide a summary of the current knowledge on supergiant fast X-ray transients and explore the contribution that the new space mission concept LOFT, the Large Observatory for X-ray Timing, will be able to provide in the field of research of these objects.     

天基与地基测量数据融合技术在靶场的应用

随着GPS技术的发展,靶场的测控也在逐步由地基测控网过渡到天地结合的一体化综合测控网。如何将天基测量数据同靶场现有的高精度测量带测量数据融合处理,近年成为数据处理的热点话题。本文就某具体任务,对天基和地基测量数据融合技术的方法和工程应用作了详细介绍,给出了初步的结论,提出了天基测量数据在工程应用时应注意的问题和有待进一步分析的问题。     

面向测控IP网的测量船测控信息交换模式研究

对基于消息中间件的测量船测控信息交换模式进行研究,首先对消息中间件技术进行探讨,然后基于测量船应用需求,从测控信息交换体系结构、测控软件系统软件部署、测控消息流管理3个方面展开基于消息中间件的测量船测控信息交换模式设计．最后对基于该模式的测控信息交换的可靠性、实时性以及易管理性等优势进行了分析。     

船载设备测量数据处理结果的综合分析方法

数据处理技术包括数据诊断与误差分析技术、数学建模与处理技术以及数值微分与弹（轨）道计算技术等,而测量误差分析与处理技术是数据处理技术的核心。如何分析和处理误差贯穿于数据处理的全过程,直接影响弹／轨道计算的精度。对误差的分析和处理是测量船数据处理工作中的重要内容。本文根据测量船数据处理实际情况介绍了测量船数据分析方法,并结合任务实例介绍了测量船误差分析和处理的详细过程。