Accuracy evaluation of ionospheric delay from multi-scale reference networks and its application for fast PPP ambiguity resolution

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025615%3A_____%2F21%3AN0000040" target="_blank" >RIV/00025615:_____/21:N0000040 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.31490/9788024845050-14" target="_blank" >https://doi.org/10.31490/9788024845050-14</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.31490/9788024845050-14" target="_blank" >10.31490/9788024845050-14</a>

Result language

angličtina

Original language name

Accuracy evaluation of ionospheric delay from multi-scale reference networks and its application for fast PPP ambiguity resolution

Original language description

The Precise Point Positioning (PPP) can achieve a fast ambiguity resolution (PPP-RTK) when augmented with precise ionospheric delays derived from regional GNSS networks. In this study, the accuracy of the ionospheric delay derived from multi-scale networks are assessed and used for the GPS and Galileo PPP-RTK demonstration. First, the convergence time of the GPS-only PPP are evaluated based on the GFZ final and CNES real-time products. Results indicated that an average convergence time of 30 min and 20 min is needed for the CNES and GFZ float solutions, respectively, in order to achieve a decimetre level horizontal position accuracy. After applying the ambiguity resolution method, 20% and 35% improvements are observed reaching 24min and 13min, respectively. Then, the accuracy of ionospheric delays derived from the ambiguity-fixed PPP and the CODE global products are assessed. A short-baseline comparison indicated that the mean bias and standard deviation of the derived multi-day ionospheric errors are within 0.15 TECU and 0.06 TECU, respectively, with a presence of a daily periodic term. The accuracy of the interpolated ionospheric delay from global models are more related to the location of the stations, ranging from 1 TECU to 3 TECU. Finally, precise ionospheric delays derived from the EUREF permanent network with the inter-station distance larger than 73 km are selected for ionospheric modelling at the user location. Results indicated that the PPP ambiguity resolution can be achieved within a minute. After enlarging the inter-station distance to 209 km, ambiguity resolution can be achieved within several epochs with improved fixing rate as well.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10500 - Earth and related environmental sciences

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Symposium GIS Ostrava 2021 Advances in Localization and Navigation

ISBN

978-80-248-4505-0

ISSN

1213-239X

e-ISSN

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Number of pages

12

Pages from-to

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Publisher name

VYSOKÁ ŠKOLA BÁŇSKÁ-TECHNICKÁ UNIVERZITA OSTRAVA

Place of publication

Ostrava

Event location

Ostrava

Event date

Mar 17, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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