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随着测绘事业的蓬勃发展,GPS技术给测绘事业带来了一场技术革命,为了使GPS接收机这一划时代的先进测量仪器在测绘领域中产生更大的经济效益,除正确使用外,还要精心的保养和及时维护,这对保持好仪器的性能、精度和寿命都是非常重要的。 相似文献
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介绍了 GPS接收机的正确使用方法 ,以及如何进行保养和及时维护 ,这对保持好仪器的性能、精度和寿命都非常重要 相似文献
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本文提出将多副天线连接到一台公共接收机的GPS测量方法、此法的目的是为了改善几公里基线的高程测定精度,这一技术的优点在于消除两天线之间单差观测值的相对钟参数,因为单差观测值不受钟差影响,对测定基线分量能保持更好的几何强度,只要各电缆之间的偏差能被小心地检验,则这一陈述就是有效的,在这一假定之下,同标准的GPS数据处理相比较,总的说高程标准偏差要改善的二倍,使用本文提出的方法,和标准数据处理方法相比 相似文献
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This paper discusses the approaches of software GPS receiver. First, the definition of a software receiver, its difference
from a conventional receiver, and the data collection hardware employed is presented. Then the acquisition and tracking algorithm
is discussed. The transition from acquisition to tracking for a real time operation is presented. The navigation data decoding,
the calculation of satellite position, and user position are discussed briefly. Finally, the advantages of a software receiver
is presented. ? 2001 John Wiley & Sons, Inc. 相似文献
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GPS接收机校准对于保证测绘成果质量是十分重要的。从实践出发探讨了GPS接收机的校准内容及方法,对测前准备、测量过程及影响GPS基线解算质量的因素进行了分析,采取了有效措施,提高了检测质量,从而更好地提高了GPS校准精度。 相似文献
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根据多年GPS接收机检验工作实践经验,详细论述了GPS接收机天线相位中心一致性检测方法、原理和具体步骤,并对测地型GPS静态测量和RTK测量精度检测和计算方法、导航型GPS接收机的定位误差检测和计算方法作了阐述。 相似文献
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GPS接收机性能之我见 总被引:2,自引:1,他引:1
对GPS接收机的硬件性能,软件功能,单频接收机与双频接收机,单星座接收机与双星座接收机,静/动态接收机与RTK接收机,部件的通用型与专用型,固定型接收机与升级型接收机及售后服务等问题用了扼要分析。 相似文献
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A new computer-aided design (CAD) program called Falcon 3.0 has been created to simulate and evaluate receiver designs. This
CAD tool aims to solve tasks at the design stage of navigation receivers that operate with signals from Navigational Satellite
Time and Ranging (NAVSTAR) and Global Navigational Satellite System (GLONASS). Specific tasks include:
· Defining the receiver frequency plan (frequencies of oscillators and filters that guarantee accuracy of the receiver)
· Specifying parameters for the digital processing of received signal
· Computing interpath and interchannel biases
· Computing statistical characteristics of correlation signals I, Q, dl, and dQ
· Calculating noise and multipath errors of measurements
· Determeining energy losses
This CAD tool has been used in the design of receivers such as Javad Positioning Systems (JPS) Legacy, Regency, Odyssey, and
Eurocard and in the prediction of their accuracy. It has been shown that experimental and predicted data agree well. ? 2000
John Wiley & Sons, Inc. 相似文献