Assisted code point positioning at sub-meter accuracy level with ionospheric corrections estimated in a local GNSS permanent network

It is well know that GNSS permanent networks for real-time positioning with stations spaced at few tens of kilometers in the average were mainly designed to generate and transmit products for RTK (or Network-RTK) positioning. In this context, RTK products are restricted to users equipped with geodet...

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Detalles Bibliográficos
Autores principales: Crespi, Mattia, Mazzoni, Augusto, Brunini, Claudio Antonio
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2009
Materias:
Geología
Física
Ionospheric Delay
Ionospheric Model
Differential Code Bias
Ionospheric Correction
Total Electron Content Unit
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127242
https://link.springer.com/chapter/10.1007%2F978-3-642-20338-1_95
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127242
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Física
Ionospheric Delay
Ionospheric Model
Differential Code Bias
Ionospheric Correction
Total Electron Content Unit
spellingShingle Geología
Física
Ionospheric Delay
Ionospheric Model
Differential Code Bias
Ionospheric Correction
Total Electron Content Unit
Crespi, Mattia
Mazzoni, Augusto
Brunini, Claudio Antonio
Assisted code point positioning at sub-meter accuracy level with ionospheric corrections estimated in a local GNSS permanent network
topic_facet Geología
Física
Ionospheric Delay
Ionospheric Model
Differential Code Bias
Ionospheric Correction
Total Electron Content Unit
description It is well know that GNSS permanent networks for real-time positioning with stations spaced at few tens of kilometers in the average were mainly designed to generate and transmit products for RTK (or Network-RTK) positioning. In this context, RTK products are restricted to users equipped with geodetic-class receivers which are continuously linked to the network processing center through Internet plus mobile phone. This work is a first step toward using a local network of permanent GNSS stations to generate and make available products devoted to ionospheric delay correction that could remarkably improve positioning accuracy for C/A receiver users, without forcing them to keep a continuous link with the network. A simple experiment was carried out based on data from the RESNAP-GPS network (w3.uniroma1.it/resnap-gps), located in the Lazio Region (Central Italy) and managed by DITS-Area di Geodesia e Geomatica, University of Rome “Sapienza”. C/A raw observations were processed with Bernese 5.0 CODSPP module (single point positioning based on code measurements) using IGS precise ephemeris and clocks. Further, the RINEX files were corrected for the Differential Code Biases (DCBs) according to IGS recommendations. One position per epoch (every 30 s) was estimated from C/A code; the vertical coordinate errors showed a typical signature due to the ionospheric activity: higher errors for day-time (up to 5 m) and smaller ones for night-time (around 1.5 m). In order to improve the accuracy of the solution, ionospheric corrections were estimated using the La Plata Ionospheric Model, based on the dual-frequency observations from the RESNAP-GPS network. This procedure allowed to reduce horizontal and vertical errors within 0.5 m (CE95) and 1 m (LE95) respectively. Finally, the possibility to predict the ionospheric model for few hours was preliminary checked. Our approach shows the possibility of a novel use of the measurements collected by GNSS permanent networks designed for real-time positioning services, which can assist and remarkably improve the C/A code real-time positioning supplying off-line predicted ionospheric corrections, acting as a local Ground Based Augmentation System.
format Objeto de conferencia
Objeto de conferencia
author Crespi, Mattia
Mazzoni, Augusto
Brunini, Claudio Antonio
author_facet Crespi, Mattia
Mazzoni, Augusto
Brunini, Claudio Antonio
author_sort Crespi, Mattia
title Assisted code point positioning at sub-meter accuracy level with ionospheric corrections estimated in a local GNSS permanent network
title_short Assisted code point positioning at sub-meter accuracy level with ionospheric corrections estimated in a local GNSS permanent network
title_full Assisted code point positioning at sub-meter accuracy level with ionospheric corrections estimated in a local GNSS permanent network
title_fullStr Assisted code point positioning at sub-meter accuracy level with ionospheric corrections estimated in a local GNSS permanent network
title_full_unstemmed Assisted code point positioning at sub-meter accuracy level with ionospheric corrections estimated in a local GNSS permanent network
title_sort assisted code point positioning at sub-meter accuracy level with ionospheric corrections estimated in a local gnss permanent network
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/127242
https://link.springer.com/chapter/10.1007%2F978-3-642-20338-1_95
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