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分析和实现了基于单基线的GPS实时姿态测量系统。通过对姿态参数的精度分析,得出了姿态测量精度同基线长度和相对精度因子的关系;分析了姿态测量系统中单点定位对相对定位精度的影响;最后对姿态测量系统的实时性和姿态测量的结果进行了分析。本文的研究对GPS姿态测量技术的工程应用和理论研究具有一定的参考价值。 相似文献
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本文论述3DF GPS接收机测定姿态角的原理。内容包括接收机的基本结构、测定姿态角的原理、误差源和精度分析。初期结果表明,测定姿态角的精度约为0.02°—0.05°。 相似文献
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提出了一种利用GPS进行船只姿态测量的新方法。该方法利用接收机之间的波程差并结合当地水平坐标系与载体坐标系的转换关系来进行载体姿态的解算,从而避开了对整周模糊度的求解,具有很高的计算效率及较好的稳定性。通过对计算结果的分析,证明了该算法的有效性,其测姿精度优于0.5°。 相似文献
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姿态测量中GPS双频观测的应用 总被引:1,自引:0,他引:1
随着GPS定位技术的发展和完善,利用GPS进行动态载体的姿态测量具有广阔的发展前景.姿态测量问题中,实时、高精度的解算整周模糊度是关键.利用双频观测、RATI0检验等方法进行单历元整周模糊度的解算,得到较好的结果.因此,这一方法可以应用到动态载体姿态测量当中去. 相似文献
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描述一种基于非专用接收机的GPS实时定姿算法,主要工作可以分为两个部分:第一,采用最小二乘方法和乔里斯基分解,基于基线长度约束压缩整周模糊度搜索空间,以达到实时计算的目的;第二,结合姿态角约束,使用金字塔算法提高了整周模糊度求解效率.经过实验,算法在基线长度为3 m的条件下,航向角精度优于0.1°. 相似文献
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GPS接收机工作原理及发展现状 总被引:1,自引:0,他引:1
根据GPS接收机的工作原理,分为连续接收机、序贯接收机和多元接收机。讨论了接收机的应用分类,分别为高精度测量型接收机,导航接收机及授时型接收机。根据GPS卫星信号的情况,介绍了GPS接收机的性能指标。根据GNSS的发展现状和卫星信号的实施论述了新一代多模双频接收机指标,根据测试结果证明:这种接收机将是未来GPS接收机的发展方向。 相似文献
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乔天荣 《测绘与空间地理信息》2012,35(4):97-99
通过在矿区施测的静态GPS控制测量,根据实际不同的坐标系工程用图需要,在矿区内均匀选择三个以上公共点的两套坐标,探讨对手持式GPS接收机求取其转换参数的方法,采用五参数转换法,求出转换参数,然后在手持GPS接受机上设置五参数来提高定位精度. 相似文献
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Lars E. Sjöberg 《Journal of Geodesy》1991,65(4):209-217
In October 1987 a four day satellite GPS campaign was performed over the Åland archipelago to test the possibility of connecting the Swedish and Finnish national height systems. This paper summarizes the gained experiences using 5 WM 101 GPS receivers and the PoPS software.The computing results for the connection between the two height systems are considerably dependent on the choice of geoidal undulation model and systematic error parameter model. Using the NKG Scandinavian geoid 1989, which is probably the most accurate geoid available for the region, and a bias and tilt parameter model the difference between the Swedish RH70 system and the Finnish N60 system is estimated to 11.4 ± 4.0 cm. An independent check is provided by two connecting border bench marks in northern Scandinavia yielding the difference 19.2 ± 4.2 cm. In view of that merely single frequency GPS receivers were used together with the PoPS software, we consider this result most satisfactory. 相似文献
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GPS technology will face not one but two critical rollover dates over the next eight months. One is the millennium (Y2K) rollover.
The other is the GPS week 1024 rollover also known as the GPS End of the Week (EOW). Each rollover dat has the potential to
cause severe problems in GPS receivers and related software. This article expolres the reasons why these dates are a problem
and describes choices that must be made as to their solution. The paper also describes some verification methods that may
be used to test GPS receivers and software. ? 1999 John Wiley & Sons, Inc. 相似文献
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随着科学技术和数字化技术的发展,GPS越来越多的应用于各种测量。GPS测量所获得的成果属于WGS—84空间直角坐标系,而有时我们要使用的坐标为高斯平面直角坐标。因此需要把GPS测量成果通过一定的转换模型转换为高斯平面直角坐标,本文就此内容进行分析探讨。 相似文献
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Heading and Pitch Determination Using GPS/GLONASS 总被引:1,自引:0,他引:1
This article describes a single difference approach to estimate heading and pitch with a twin global positoning system (GPS)/GLONASS
(GG) receiver system. Augmentation of GPS with GLONASS is not straightforward, however, because the latter system employs
the frequency division multiple access technique to distinguish the signals form different satellites, rather than the code
division multiple access technique used by GPS. The fact that each GLONASS signal has its own slightly different frequency
makes the double difference (DD) of carrier phase observables no longer possible without modification. To get around this
problem, the use of the between-receiver single difference (SD) of the carrier phase observables is proposed. In this case,
however, receiver clock and other errors do not cancel out. The possibility of using a common external oscillator for the
two receivers is explored. Remaining time and other biases are estimated using a low-pass averaging filter. The single difference
integer ambiguities can then be resolved and the heading and pitch can be determined with a relatively good level of accuracy.
Static and kinematic tests conducted with a pair of GPS/GLONASS receivers are used to validate the approach. Under reduced
visibility, the combined GPS/GLONASS approach is shown to yield superior availability. ? 2000 John Wiley & Sons, Inc. 相似文献
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By the beginning of 1996 the Russian Global Navigation Satellite System (GLONASS) constellation was completely deployed,
although several satellites have already been decommissioned since then. With 17 satellites in operation (status as of 21
December 1997, although two of them are unusable and one is a non-operative spare), GLONASS is now an alternative and a complement
to GPS. We present an evaluation of the current status of the GLONASS system, paying particular attention to its possible
geodetic applications. Data from several receivers were used for this evaluation, including data from GPS receivers in order
to allow for a comparison between GLONASS and GPS. We tested the quality of the geodetic observables, the consistency of the
broadcast orbits, the single-point positioning results, and we also looked at multipath errors and cycle slips in our GLONASS
data. In general the GLONASS performance has been found to be very satisfactory, even better than GPS in aspects such as single-receiver
positioning or in the quality of the second-frequency pseudo-ranges due to the degradation of the GPS measurement quality
under selective availability and anti-spoofing.
Received: 26 November 1996 / Accepted: 16 January 1998 相似文献
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徐丹龙 《测绘与空间地理信息》2020,(2):128-131
随着北斗卫星导航定位系统(BDS)的日趋完善和成熟,基于BDS与GPS和GLONASS的多星座动态测量技术得到广泛应用,显著提升了困难区域的动态测量效率和精度。因此,本文探讨了BDS/GPS组合系统,介绍了BDS/GPS及后差分动态测量(PPK)基本原理及数据处理模型,而且通过在某大学进行的两组动态测量实验中,进行PPK处理得到BDS和GPS的单系统动态测量结果,以及BDS/GPS组合系统的动态测量结果,两组实验数据表明:BDS或GPS单系统与BDS/GPS组合系统相比,BDS/GPS组合系统的动态测量效果优于BDS或GPS任一单系统动态测量的效果,且测量结果更为可靠。 相似文献