Global empirical modelling of the total electron content of the ionosphere for satellite radio navigation systems

Ivanov, V. B.; Gefan, G.D.; Gorbachev, O. A.

doi:10.1016/j.jastp.2011.03.010

Cited by 28 publications

(17 citation statements)

References 3 publications

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“…In NTCM GL the root mean square deviation of the modeled TEC from the initial ones is 7.5 TECU. In the GEMTEC (not yet optimized) model (as it is shown in [3]) the deviation is 6.2 TECU. The fact that NTCN GL is presented with only 12 coefficients might be its advantage, whereas GEMTEC presents a whole numerical block with a dimension of several kilobytes.…”

Section: Discussionmentioning

confidence: 99%

“…In the initial version [3], the algorithm of model formation looks like the following. There are sets of measurements of value which depends on the x factor and on the conglomerate of other factors sym bolized by the number of the set In each set of measurements, the variable x takes values whereas other factors are unchangeable.…”

Section: The Gemtec Modelmentioning

confidence: 99%

“…The use of the method of expansion in terms of natural orthogo nal functions makes it possible, on the one hand, to substantially compress the initial data by volume, and, on the other hand, to filter out random noise in the initial data. It was shown in [3] that for achieving the two above indicated aims, the GEMTEC model reproduces the necessary information on TEC quite correctly. A preliminary testing of the model in order to enhance positioning accuracy as a result of the sub stitution of the Klobuchar model by the GEMTEC model was performed in [4].…”

Section: Introductionmentioning

confidence: 96%

“…Ideas immediately appeared to apply the expansion in terms of the natural orthogonal functions κ of TEC, itself presented by maps of the so called GIM model published on the Internet and being a processing of experimental data on total elec tron content. As a result, a model of the TEC, called GEMTEC (Global Empirical Model of Total Electron Content) by the authors of [3], was created. The use of the method of expansion in terms of natural orthogo nal functions makes it possible, on the one hand, to substantially compress the initial data by volume, and, on the other hand, to filter out random noise in the initial data.…”

Section: Introductionmentioning

confidence: 99%

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Optimization and testing of the GEMTEC model of total electron content in the ionosphere

et al. 2015

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A renewed version of the model of the total electron content in the ionosphere, GEMTEC, is pre sented, aimed at an increase in the accuracy of positioning of single frequency equipment of satellite radio navigation systems. The results of testing of this model in comparison with the standard method of compen sation of the ionospheric delay of radio signals using the Klobuchar model are presented. It is shown that the proposed model is much more accurate than the Klobuchar model.

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Section: Discussionmentioning

confidence: 99%

Section: The Gemtec Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Optimization and testing of the GEMTEC model of total electron content in the ionosphere

et al. 2015

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“…That is to say, the model in (3) includes modeling errors. Furthermore, to evaluate the effect of the error, assume that there is ℎ that meets the ellipsoid equation in (4). Consider the geometric constraint relationship of 2 and 1 , given ( , , ), and the following equations can be obtained:…”

Section: Approximate Ellipsoid Modelmentioning

confidence: 99%

Application of Baro-Altimeter Sensor in Emergency Positioning and Navigation Based on Compass GEO Satellites

Zhan

Pang

Zhang

et al. 2013

International Journal of Distributed Sensor Networks

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Frame synchronization time of geostationary Earth orbit (GEO) satellites is faster than that of incline geosynchronous satellite orbit and medium Earth orbit satellites in Beidou navigation satellite system (BDS). So time to first fix can be reduced greatly with GEO satellites (GEOs) to provide emergency positioning service during the cold start process. Meanwhile, GEOs can also be utilized to provide radio determination satellite services. Therefore, it is meaningful to research the emergency positioning algorithm based on GEOs. However, due to the poor geometry of the GEOs, the availability and accuracy degrade distinctly. To solve this problem, a low-cost high resolution MS5534B barometric (baro-) module is applied to BDS. Firstly, the principle of emergency positioning based on a baro-altimeter sensor and its performance such as the accuracy are elaborated. Then the effects of baro-altimeter sensor measurement error on positioning are analyzed. Finally, after analyzing the limitation of the conventional algorithms, a new highaccuracy emergency positioning algorithm with baro-altimeter sensor aiding is proposed, which is not limited by the integration and user's altitude. In comparison to the conventional algorithms, the stimulant and experimental results validate the effectiveness, robustness, and higher performance of the proposed algorithms incorporated with sensors.

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Real-Time Integrity Monitoring for Civil Aviation with Improved Navigation Performance

Chang

Zhan

Zhai

2020

Lecture Notes in Electrical Engineering

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Global empirical modelling of the total electron content of the ionosphere for satellite radio navigation systems

Cited by 28 publications

References 3 publications

Optimization and testing of the GEMTEC model of total electron content in the ionosphere

Optimization and testing of the GEMTEC model of total electron content in the ionosphere

Application of Baro-Altimeter Sensor in Emergency Positioning and Navigation Based on Compass GEO Satellites

Real-Time Integrity Monitoring for Civil Aviation with Improved Navigation Performance

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