P3: A Public Precise Positioning Service based on a national GNSS network

Kirkko-Jaakkola, Martti; Saarimäki, Jarno; Söderholm, Stefan; Guinness, Robert; Ruotsalainen, Laura; Koivula, Hannu; Mattila, Tuukka; Nyberg, Sonja

doi:10.1109/icl-gnss.2014.6934161

Cited by 10 publications

(9 citation statements)

References 10 publications

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“…It is also seen that these two receivers produced a significantly skewed C/N 0 distribution as opposed to the smartphone whose distribution is quite symmetric. The phone's histograms include both GPS and GLONASS signals and its mean is approximately 10 dB lower than that of the dashboard-mounted U-Blox, which conforms with the observation made in [9] that the noise level is considerably higher in the smartphone's GNSS measurements than in the U-Blox. However, the histograms for the urban test show remarkably similar distributions for the dashboard U-Blox and the smartphone around the 20 dBHz region.…”

Section: B Measurement Availabilitysupporting

confidence: 86%

“…For instance, the International GNSS Service (IGS) [13] provides precise satellite ephemerides, ionosphere maps, and other products free of charge. Recently, national services providing countrywide state-space representation error models [14], [15] have been developed. Although PPP has traditionally been a postprocessing technique, it is today feasible in real time as the correction data can be streamed, e.g., using the NTRIP protocol.…”

Section: B Precise Point Positioningmentioning

confidence: 99%

“…In this paper, a commercial smartphone model running a custom firmware is used in order to access the raw pseudorange and carrier phase measurements made by the internal GNSS receiver of the smartphone, and these measurements are processed using the same software that is used for the other receivers. It has been shown that precise GNSS positioning is possible using the antenna of a smartphone [8], but it is not straightforward to implement using the actual measurements made by the integrated GNSS chip [9].…”

Section: Introductionmentioning

confidence: 99%

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Effect of antenna location on GNSS positioning for ITS applications

Kirkko-Jaakkola

Feng

Xue

et al. 2016

2016 European Navigation Conference (ENC)

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Abstract-The proliferation of GNSS-receiving mobile devices in the consumer market and the growth of the Intelligent Transportation Systems sector have raised a lot of interest in low-cost precise positioning. However, GNSS signal quality is degraded inside the metal body of a vehicle, which is where the antenna of a portable device is to be located. This article investigates the effect of antenna location on precise low-cost GNSS positioning for a road vehicle. We compare a roof-mounted GNSS receiver with an identical receiver having the antenna on the dashboard and a tailored smartphone also located inside the cabin; both the availability of raw carrier phase measurements and the resulting horizontal precise point positioning accuracy are evaluated. The test results show that the 90 % circular error probable is degraded by several meters inside the vehicle. Moreover, most of the evaluated accuracy metrics indicate that the low-cost GNSS receiver with antenna inside the cabin achieved a positioning accuracy at least 50 % better than the smartphone located next to it when using the same satellite systems.

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Section: B Measurement Availabilitysupporting

confidence: 86%

Section: B Precise Point Positioningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of antenna location on GNSS positioning for ITS applications

Kirkko-Jaakkola

Feng

Xue

et al. 2016

2016 European Navigation Conference (ENC)

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“…[1][2][3][4][5][6][7][8][9][10] who have performed numerous tests in a variety of static and kinematic environments. However, there is a growing demand for the surveying community to ensure that the emerging technology of low-cost HS receivers can meet standards that guarantee reliable geodetic control work.…”

Section: Introductionmentioning

confidence: 99%

Compliance of low-cost, single-frequency GNSS receivers to standards consistent with ISO for control surveying

Tsakiri

Sioulis

Piniotis

2017

Int. J. Metrol. Qual. Eng.

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Abstract. The emergence of single-frequency, navigation-type Global Navigation Satellite System receivers capable to provide carrier phase data [the so-called high sensitivity (HS) carrier phase positioning] has been steadily growing over the recent years. The main purpose of this study is to metrologically evaluate two low-cost, HS receivers, namely the u-blox LEA-6T and NEO-7P, in control surveying specifications. The evaluation was carried out within a published framework of standards and associated guidelines that are consistent with standards from the International Standards Organisation. The survey results were obtained from sufficient independent testing and proof and achieved an accuracy classification of '1 cm' at 95% confidence level. This indicates that the particular type of receiver used with geodetic antennas can provide positioning results for general purpose control surveying applications that are comparable to using geodetic receivers and with a significantly lower cost.

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“…Miniaturized and low-cost inertial measurement system (IMU) and GNSS sensors have entered to the market and being used in drone applications. Network based positioning, specifically with the Virtual Reference Station (VRS) concept, has been established in many countries, for example the Finnish network (Kirkko-Jaakkola et al, 2014). VRS technique enables few centimetre accuracy level in real-time without the high correlation between the distance of a rover and the closest reference station as in current single base real-time kinematic (RTK) systems (Rizos, 2003).…”

Section: Introductionmentioning

confidence: 99%

Real-Time and Post-Processed Georeferencing for Hyperpspectral Drone Remote Sensing

Oliveira

Khoramshahi

Suomalainen

et al. 2018

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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The use of drones and photogrammetric technologies are increasing rapidly in different applications. Currently, drone processing workflow is in most cases based on sequential image acquisition and post-processing, but there are great interests towards real-time solutions. Fast and reliable real-time drone data processing can benefit, for instance, environmental monitoring tasks in precision agriculture and in forest. Recent developments in miniaturized and low-cost inertial measurement systems and GNSS sensors, and Real-time kinematic (RTK) position data are offering new perspectives for the comprehensive remote sensing applications. The combination of these sensors and light-weight and low-cost multi- or hyperspectral frame sensors in drones provides the opportunity of creating near real-time or real-time remote sensing data of target object. We have developed a system with direct georeferencing onboard drone to be used combined with hyperspectral frame cameras in real-time remote sensing applications. The objective of this study is to evaluate the real-time georeferencing comparing with post-processing solutions. Experimental data sets were captured in agricultural and forested test sites using the system. The accuracy of onboard georeferencing data were better than 0.5&thinsp;m. The results showed that the real-time remote sensing is promising and feasible in both test sites.

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P3: A Public Precise Positioning Service based on a national GNSS network

Cited by 10 publications

References 10 publications

Effect of antenna location on GNSS positioning for ITS applications

Effect of antenna location on GNSS positioning for ITS applications

Compliance of low-cost, single-frequency GNSS receivers to standards consistent with ISO for control surveying

Real-Time and Post-Processed Georeferencing for Hyperpspectral Drone Remote Sensing

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