Techniques to improve the GPS precision

Acosta, Nelson; Toloza, Juan Manuel

doi:10.14569/ijacsa.2012.030820

Cited by 23 publications

(14 citation statements)

References 13 publications

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“…Various positioning methods are use like differential GPS (DGPS), the RTK-GPS positioning, and the virtual reference point method…etc. [14], [15].…”

Section: Types Of Gps Positioning Methodsmentioning

confidence: 99%

The Possibility of Using Navigation GPS Devices in the Survey Engineering

dami¹,

Abdulridha²

2018

IJET

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As a result of the tremendous development in the field of computer technologies, communications and information revolution, new applications which has seen a tremendous development in terms of devices and technologies used in various applications such as a device Electronic Distance Measurement (EDM), Total Station, GPS (Surveyor and Navigational)… etc. In this study, five-ground control points (BM) were made to provide traverse, and these points observed by using three different navigation GPS devices, and observed by using TOTALSTATION device, and using spatial and statistical analysis functions in GIS. The study showed that the error in these devices is a random error varies from one device to another. In addition, it showed that the error varies from time to time. Cannot be determined the spread of readings to the observed point (by navigation GPS) in a particular direction or specific frame, as well as the central distance of the readings are changing from one device to another and from point to point.The study recommends that should not be used navigation GPS devices in the survey work. In addition, re-survey all areas are observed or defined its borders by using this device (navigation GPS) by serving GPS devices with the required accuracy.

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“…Various positioning methods are use like differential GPS (DGPS), the RTK-GPS positioning, and the virtual reference point method…etc. [14], [15].…”

Section: Types Of Gps Positioning Methodsmentioning

confidence: 99%

The Possibility of Using Navigation GPS Devices in the Survey Engineering

dami¹,

Abdulridha²

2018

IJET

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“…Its main mission is to acquire high accurate DEM and support some civil applications, such as biomass inversion, disaster forecasting, and climate and environmental monitoring [22]. The GNSS disciplining module in LuTan-1 mission employs a disciplined rubidium clock to provide a time-frequency signal for the SAR systems with high accuracy [24,[27][28][29][30]. However, the oscillator noise between the two satellites will severely degrade the performance of the LuTan-1 imaging and interference processing [13].…”

Section: Phase Synchronization Scheme Of Lutan-1mentioning

confidence: 99%

The Synchronization Transceiver Design and Experimental Verification for the LuTan-1 SAR Satellite

Jiao

Liang

Liu

et al. 2020

Sensors

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The deviation between the two oscillators in BiSAR systems will cause a residual modulation of echo signal. Therefore, the phase synchronization is an important issue that must be addressed for BiSAR systems. An advanced non-interrupted phase synchronization scheme is used for the LuTan-1 SAR satellite. The synchronization transceiver (STR) is designed for transmitting and receiving synchronization signals. In addition, STR mainly consists of master and auxiliary transceivers and switch module. Furthermore, the function and working principle of STR are introduced, and the detailed design of each part is described. The measured results are also evaluated to prove the performance of the STR. In addition, the phase synchronization accuracy is also demonstrated to verify the effectiveness of the non-interrupted synchronization scheme. The standard deviation (STD) of the residual phase is less than 0.3 degrees. The results have guiding significance for the synchronization unit design of LuTan-1 and the future BiSAR system.

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“…• DGPS (Differential GPS): network of reference stations helps the positioning up to 10 cm (requires DGPS station closer than 1000 km to the receiver) • AGPS (Assisted GPS): uses auxiliary software in order to know the exact positions of the satellites, requires active data connection • RTK (Real Time Kinematic): it provides cm-level precision by measuring the phase of the carrier wave of the signal • e-Dif (extended Differential): useful at regions where differential corrections are not available ensuring 1 m accuracy • other augmentation systems (Acosta and Toloza, 2012) There are algorithms also for successful data analysis, combining GPS signal with external aids including Wiener filter, Kalman filter, neural networks, etc. Kalman filter which is an improvement of the Wiener one has the advantage of requiring only the current measurement and state compared to Wiener filter.…”

Section: About Vts and Avl In Generalmentioning

confidence: 99%

Survey on Vehicle/Fleet Tracking Methods Applied in the Transportation and Construction Industry

Kovács¹,

Rózsa²

2015

Period. Polytech. Transp. Eng.

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The need for monitoring vehicles and equipment during their activity is growing as the globalization spreads. The companies require distinct information about their machines which can operate in various locations in large numbers for different purposes. Beside that information demand also appeared at the client side which has to be satisfied by the firms. This paper summarize the present possibilities and recent researches for gathering and distributing the necessary data first at the transportation then in the construction industry.

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Techniques to improve the GPS precision

Cited by 23 publications

References 13 publications

The Possibility of Using Navigation GPS Devices in the Survey Engineering

The Possibility of Using Navigation GPS Devices in the Survey Engineering

The Synchronization Transceiver Design and Experimental Verification for the LuTan-1 SAR Satellite

Survey on Vehicle/Fleet Tracking Methods Applied in the Transportation and Construction Industry

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