Regional ionospheric TEC modeling based on a two-layer spherical harmonic approximation for real-time single-frequency PPP

Z Li, N Wang, L Wang, A Liu, H Yuan, K Zhang - Journal of Geodesy, 2019 - Springer
The ionosphere has been considered as one of the major error sources in GNSS signal
propagation, and it is still difficult to be modeled precisely, especially for real-time …

Modeling regional ionospheric delay with ground-based BeiDou and GPS observations in China

R Zhang, W Song, Y Yao, C Shi, Y Lou, W Yi - GPS solutions, 2015 - Springer
Abstract The Compass/BeiDou system is currently being built as a navigation constellation
consisting of 16 navigation satellites. Construction of these satellites will significantly …

The GIVE ionospheric delay correction approach to improve positional accuracy of NavIC/IRNSS single-frequency receiver

MV Desai, SN Shah - Current Science, 2018 - JSTOR
The Navigation with Indian Constellation (NavIC)/Indian Regional Navigation Satellite
System (IRNSS) is an independent navigation system developed for the Indian subcontinent …

Estimation of ionospheric delay of NavIC/IRNSS signals using the Taylor Series Expansion

MV Desai, SN Shah - Journal of Space Weather and Space …, 2019 - swsc-journal.org
The delay in Navigation with Indian Constellation (NavIC)/Indian Regional Navigation
Satellite System (IRNSS) signals due to the ionosphere are decisive because it leads to …

Modeling of ionospheric time delay using anisotropic IDW with jackknife technique

VS Srinivas, AD Sarma… - IEEE Transactions on …, 2015 - ieeexplore.ieee.org
Transionospheric signals are affected due to the existence of anisotropic plasma in the
ionosphere. The precise estimation of ionospheric time delay will play a major role in …

Improved phase center estimation for GNSS patch antenna

A Kumar, AD Sarma, E Ansari… - IEEE transactions on …, 2013 - ieeexplore.ieee.org
Precise positioning in Global Navigation Satellite System requires the exact location of
antenna phase center. Various published methods are quite complex and difficult to …

[HTML][HTML] National BDS augmentation service system (NBASS) of China: progress and assessment

C Shi, F Zheng, Y Lou, S Gu, W Zhang, X Dai, X Li… - Remote Sensing, 2017 - mdpi.com
In this contribution, the processing strategies of real-time BeiDou System (BDS) precise
orbits, clocks, and ionospheric corrections in the National BDS Augmentation Service …

Modeling of ionospheric time delays based on a multishell spherical harmonics function approach

DV Ratnam, JRKK Dabbakuti… - IEEE Journal of Selected …, 2017 - ieeexplore.ieee.org
Ionospheric delay is the primary source of error in the functional performance of global
navigation satellite system (GNSS) receiver position and time determination. An accurate …

Accuracy evaluation of estimated ionospheric delay of GPS signals based on Klobuchar and IRI-2007 models in low latitude region

KCT Swamy, AD Sarma, VS Srinivas… - … and Remote Sensing …, 2013 - ieeexplore.ieee.org
The required positional accuracy of GPS is limited by several error sources. Among these,
the predominant error source is the ionosphere, which introduces error in range …

Case study: performance observation of NavIC ionodelay and positioning accuracy

MV Desai, SN Shah - IETE Technical Review, 2021 - Taylor & Francis
The NavIC is an Indian satellite based navigation system uses the L5 and S-band signals to
provide 10 m (metres) and 0.1 m positioning accuracy services for civilian and military users …