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With the Global Positioning System (GPS), it is possible to estimate the baseline vectors between several GPS antennas (with fixed positions on a vehicle) and so, the attitude can be determined. To achieve this, the precise carrier phase measurements are used, however, these measurements have the so called phase ambiguities (integer number of cycles) that need to be solved. When only single-frequency...
The Global Positioning System (GPS) can be used to estimate the attitude of a vehicle. To do this, multiple receivers should be used with the antennas in known fixed positions in the vehicle body frame. Since the estimation of the attitude angles needs high precision, the carrier phase measurements (with millimeter precision) are used in combination with the pseudorange measurements. Nevertheless,...
The Global Positioning System can be used to determine the attitude of a vehicle by using multiple receivers in fixed positions. The carrier phase measurements, which have millimetric precision, can be used for this purpose. However, these measurements have an unknown number of integer cycles named phase ambiguities, which have to be determined. Of all the methods known, LAMBDA is currently acknowledged...
The microwave link planning tool described in this paper, named as Smart Link Planning Tool (SLPT), is a wireless communication planning tool for radio point-to-point communications, using microwave links (ML). This tool was firstly developed with the aim of helping telecommunication students, on their procedures to study and plan a ML and it was developed in a modern programming language, Java, to...
This paper proposes a weighted total least squares approach based on both pseudorange and carrier phase measurements. The paper makes use of the weighted total least squares solution to solve the global positioning system (GPS) navigation equation determining the user position. The total least squares estimation considers both measurements vector and observable data matrix errors which common least...
The use of GPS carrier-phase measurements from multiple receivers can be used in the determination of multiple baseline vectors. This can be used for the high precision determination of a vehicle attitude. The use of these measurements requires the determination of the integer carrier phase ambiguities, which is a problem usually addressed with dual-frequency receivers. However, the high cost of these...
GPS based techniques allow a highly accurate attitude determination when using carrier phase measurements. However, these techniques require the determination of the integer carrier phase ambiguities. This is a problem that is usually addressed in a context of dual frequency receivers. Due to the high cost of these receivers, strong motivation exists to explore these techniques with cheaper L1 single...
When using the signal from the Global Positioning System (GPS) for precise estimation of a vehicle’s heading, the main challenge is finding the integer ambiguities in the carrier phase measurements. If the distance between the receiver’s antennas, also known as baseline length, is used in the process of solving that challenge, the resulting solution’s stability and precision can be enhanced, particularly...
In situations of natural disasters or similar, people involved in civil protection operations need the highest degree of coordination. When resorting to digital means of coordination like positioning applications that rely on the Global Positioning System (GPS) to show users their position on digitalized cartography, users expect their position to be shown as accurately as possible. To achieve this,...
When using the signal from the Global Positioning System for precise estimation of the heading of a vehicle, the main challenge is finding the integer ambiguities that the carrier phase measurements contain. Using the known distance between the antennas, this process may return improved results, which can be even further enhanced if careful selection of observable data, the measurement from each satellite,...
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