Precise estimation of absolute ionospheric delay based on GPS active network

Wu Chen; Congwei Hu; Shan Gao; Yongqi Chen; Xiaoli Ding; null Simon; Chi Wo Kowk

Precise estimation of absolute ionospheric delay based on GPS active network

Wu Chen, Congwei Hu, Shan Gao, Yongqi Chen, Xiaoli Ding, Simon, Chi Wo Kowk

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

1 Citation (Scopus)

Abstract

A new algorithm for absolute GPS ionospheric delay estimation is proposed in this paper. This algorithm is mainly based on GPS carrier phase observation. Instead of using geometry-free code or carrier phase observation directly, we first determine single difference (SD) ambiguity N1 and N2 by using ionosphere-free ambiguity obtained at one station with the precise point positioning (PPP) techniques and wide lane (WL) ambiguity. Thus only one geometry-free ambiguity bias is remained in all observations for one station. If a GPS network is used, the double difference (DD) ambiguity can be taken as an additional constraint. In our method, the information between different satellites and between stations are considered thus not only the number of constant parameters are reduced but also the stability of absolute ionosphere modeling and the accuracy of the estimation are improved. 24-hours GPS data from a GPS network are used to evaluate the models presented in the paper.

Original language	English
Title of host publication	Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004
Pages	420-427
Number of pages	8
Publication status	Published - 1 Dec 2004
Event	17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004 - Long Beach, CA, United States Duration: 21 Sept 2004 → 24 Sept 2004

Conference

Conference	17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004
Country/Territory	United States
City	Long Beach, CA
Period	21/09/04 → 24/09/04

ASJC Scopus subject areas

General Engineering

Cite this

@inproceedings{ed8a5276e03a4aa282934886d1a3dc6d,

title = "Precise estimation of absolute ionospheric delay based on GPS active network",

abstract = "A new algorithm for absolute GPS ionospheric delay estimation is proposed in this paper. This algorithm is mainly based on GPS carrier phase observation. Instead of using geometry-free code or carrier phase observation directly, we first determine single difference (SD) ambiguity N1 and N2 by using ionosphere-free ambiguity obtained at one station with the precise point positioning (PPP) techniques and wide lane (WL) ambiguity. Thus only one geometry-free ambiguity bias is remained in all observations for one station. If a GPS network is used, the double difference (DD) ambiguity can be taken as an additional constraint. In our method, the information between different satellites and between stations are considered thus not only the number of constant parameters are reduced but also the stability of absolute ionosphere modeling and the accuracy of the estimation are improved. 24-hours GPS data from a GPS network are used to evaluate the models presented in the paper.",

author = "Wu Chen and Congwei Hu and Shan Gao and Yongqi Chen and Xiaoli Ding and Simon and Kowk, {Chi Wo}",

year = "2004",

month = dec,

day = "1",

language = "English",

pages = "420--427",

booktitle = "Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004",

note = "17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004 ; Conference date: 21-09-2004 Through 24-09-2004",

}

Chen, W, Hu, C, Gao, S, Chen, Y, Ding, X, Simon & Kowk, CW 2004, Precise estimation of absolute ionospheric delay based on GPS active network. in Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004. pp. 420-427, 17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004, Long Beach, CA, United States, 21/09/04.

Precise estimation of absolute ionospheric delay based on GPS active network. / Chen, Wu; Hu, Congwei; Gao, Shan et al.
Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004. 2004. p. 420-427.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

TY - GEN

T1 - Precise estimation of absolute ionospheric delay based on GPS active network

AU - Chen, Wu

AU - Hu, Congwei

AU - Gao, Shan

AU - Chen, Yongqi

AU - Ding, Xiaoli

AU - Simon, null

AU - Kowk, Chi Wo

PY - 2004/12/1

Y1 - 2004/12/1

N2 - A new algorithm for absolute GPS ionospheric delay estimation is proposed in this paper. This algorithm is mainly based on GPS carrier phase observation. Instead of using geometry-free code or carrier phase observation directly, we first determine single difference (SD) ambiguity N1 and N2 by using ionosphere-free ambiguity obtained at one station with the precise point positioning (PPP) techniques and wide lane (WL) ambiguity. Thus only one geometry-free ambiguity bias is remained in all observations for one station. If a GPS network is used, the double difference (DD) ambiguity can be taken as an additional constraint. In our method, the information between different satellites and between stations are considered thus not only the number of constant parameters are reduced but also the stability of absolute ionosphere modeling and the accuracy of the estimation are improved. 24-hours GPS data from a GPS network are used to evaluate the models presented in the paper.

AB - A new algorithm for absolute GPS ionospheric delay estimation is proposed in this paper. This algorithm is mainly based on GPS carrier phase observation. Instead of using geometry-free code or carrier phase observation directly, we first determine single difference (SD) ambiguity N1 and N2 by using ionosphere-free ambiguity obtained at one station with the precise point positioning (PPP) techniques and wide lane (WL) ambiguity. Thus only one geometry-free ambiguity bias is remained in all observations for one station. If a GPS network is used, the double difference (DD) ambiguity can be taken as an additional constraint. In our method, the information between different satellites and between stations are considered thus not only the number of constant parameters are reduced but also the stability of absolute ionosphere modeling and the accuracy of the estimation are improved. 24-hours GPS data from a GPS network are used to evaluate the models presented in the paper.

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M3 - Conference article published in proceeding or book

SP - 420

EP - 427

BT - Proceedings of the 17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004

T2 - 17th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2004

Y2 - 21 September 2004 through 24 September 2004

ER -

Precise estimation of absolute ionospheric delay based on GPS active network

Abstract

Conference

ASJC Scopus subject areas

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